PHYSICS Chapter No. 01 ELECTROSTATICS 2nd Year Online MCQs MDCAT & ECAT Preparation Test No.2

PHYSICS
Chapter Name : ELECTROSTATICS
Chapter No. 01 [Test No.2]
2st Year
Multiple Choice Questions

Book Name : PHYSICS
Chapter No. 01 (Test No.2)
Chapter Name : ELECTROSTATICS
Total MCQ from Text Book : 96
Book Version : 2020
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 12 ( F.Sc. Intermediate)
Total Marks : 96
Total Time : 48 minutes

GRADE 12 - PHYSICS CHAPTER NO.1 ELECTROSTATICS Test No.2

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

GRADE 12 - PHYSICS CHAPTER NO.1 ELECTROSTATICS Test No.2

Start

Congratulations - you have completed GRADE 12 - PHYSICS CHAPTER NO.1 ELECTROSTATICS Test No.2. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Relative permittivity for air is:

A	1.6
B	1.0006
C	1.06
D	1.006

Question 2

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. Which of the following quantity remain unchanged?

A	Potential
B	Energy
C	Charge
D	Capacity

Question 3

Due to polarization, electric field E

A	Decreases
B	Remains same
C	Increases
D	First increase then decrease

Question 4

The product of resistance and capacitance is

A	Acceleration
B	Force
C	Time
D	Velocity

Question 5

4 x 10²⁰ eV energy is required to move a charge of 0.25 C from A to B the potential difference between A and B is

A	256 V
B	400 V
C	178 V
D	356 V

Question 6

If potential difference across two plates of a parallel plates capacitor is doubled then the energy stored in it will be

A	4-times
B	2-times
C	Remain same
D	8-times

Question 7

A metallic ball having charge 10^-8C moves from a point A at potential 600V to a point B at zero potential. Which of the following is the change in its K.E.

A	-6 x 10⁶ J
B	6 x 10⁶ J
C	6 x 10^-6 erg
D	6 x 10^-6 J

Question 8

If a metal plate is placed between two point charges then electrostatic force between them.

A	Decrease
B	Become zero
C	Remain constant
D	Increase

Question 9

The toner of the printer is given

A	Negative charge
B	Positive charge
C	First positive then negative
D	Neutral

Question 10

A charge Q is enclosed in a dielectric of strength K the maximum number of electric lines of force are

A	Q/ε₀
B	Q/Kε₀
C	Infinite
D	Zero

Question 11

The electric flux through closed surface depends upon.

A	Geometry
B	Medium
C	Charge
D	Charge and medium

Question 12

The capacitance of a capacitor can be increased by

A	Increasing the area of the plates
B	Placing dielectric between them
C	Both a & b
D	Increasing the distance between plates

Question 13

Electric field and electric potential inside hollow charged conducting sphere are respectively.

A	0, 1/4π ε_ο q/r²
B	Non zero, zero
C	Zero, non zero
D	1/4π ε_ο q/r², 1/4π ε_ο q/r

Question 14

Capacitance of parallel plate capacitor is:

A	6.25 x 10^-18 eV
B	1.6 x 10¹⁹ eV
C	6.25 x 10¹⁸ eV
D	1.6 x 10^-19 eV

Question 15

The number of electrons in one coulomb charge is equal to:

A	6.25 x 10¹⁹
B	6.25 x 10^-19
C	6.25 x 10¹⁸
D	1.6 x 10^-19

Question 16

If f₁ and ₂ are forces acting on ?-particle and electron respectively, when

A	F_{1_{> F₂}}
B	F_{1_{= F₂}}
C	F_{1_{< F₂}}
D	F_{1_{= 4F₂}}

Question 17

A 1?F capacitor is subjected to 4000V potential difference the energy stored in capacitor is:

A	4 x 10^-3/sup>J
B	12 x 10^3/sup>J
C	16J
D	8J

Question 18

The electrostatic force of repulsion between two electrons at a distance 1m is:

A	2.3 x 10^-28N
B	2.3 x 10^-30N
C	2.3 x 10^-24N
D	2.3 x 10^-26N

Question 19

For computation of electric flux, the surface area should be

A	Spherical
B	Parallel
C	Curved
D	Flat

Question 20

The unit of Electric intensity other than NC^-1 is:

A	V/C
B	N/V
C	V/A
D	V/m

Question 21

A charged conductor has charge on its:

A	Outer-surface
B	Inner-surface
C	Surrounding space
D	Middle point

Question 22

1 ohm x 1 farad is equal to

A	1 second
B	1 ampere
C	1 coulomb
D	1 joule

Question 23

Two equal and opposite equal charges separated by small distance are said to make a :

A	Super conductor
B	Dipole
C	LED
D	Insulator

Question 24

The Electrostatic force between two charges is 42 N. If we place a dielectric of er.=2.1 between the charges, then the force become equal to:

A	20 N
B	88.2 N
C	2 N
D	42 N

Question 25

The product of resistance and capacitance is called

A	Force
B	Velocity
C	Time
D	Current

Question 26

Selenium is a:

A	Conductor
B	Insulator
C	Photoconductor
D	First insulator then Conductor

Question 27

Which of the following is the dielectric constant of metals?

A	Infinity
B	Zero
C	One
D	Greater than one but finite

Question 28

The work done in bringing a unit positive charge from infinity to that point in an electric field is called:

A	All of these
B	Absolute potential
C	Potential difference
D	Potential

Question 29

The value of Coulomb's constant (K) in SI units is

A	9 x 10⁹Nm²C²
B	9 x 10⁹N^-1m²C²
C	9 x 10⁹NC²m^-2
D	9 x 10⁹Nm²C^-2

Question 30

An alpha particle is accelerated through potential difference of 10⁶V.Which of the following is its K.E?

A	4 MeV
B	1 MeV
C	8 MeV
D	2 MeV

Question 31

Which one of the following relations for the energy stored in capacitor is not correct?

A	1/2 QV
B	1/2 CV²
C	None of these
D	1/2 Q² / C

Question 32

If an insulating material called dielectric is introduced between the plates, the capacitance of capacitor is:

A	Aε_οε_r / 2d
B	2Aε_οε_r / d
C	Ad / ε_οε_r
D	Aε_οε_r / d

Question 33

Which of the following is not the energy stored between the plates of a condenser?

A	U = qV/2
B	U = CV²/2
C	U = 2qV
D	U = q²/2C

Question 34

Due to polarization of the dielectric, the capacitance of the capacitor:

A	Remain constant
B	Increases
C	Becomes zero
D	Decreases

Question 35

A charge Q is divided into two parts q₁ and q₂. The maximum coulomb repulsion between the two parts is obtained when ratio q₁/q₂ is.

A	1/4
B	1
C	2/3
D	1/2

Question 36

The force between two similar unit charges placed one meter apart in air is:

A	9 x 10⁹ N
B	One Newton
C	Zero
D	9 x 10^-9 N

Question 37

The energy stored in a charged capacitor is given by:

A	1/2 C²V
B	1/2 CV²
C	1/2 Q²V
D	1/2 QV²

Question 38

Charge on electron is:

A	1.6 x 10¹⁹ C
B	1.6 x 10^-19 C
C	1.6 x 10¹⁷ C
D	1.6 x 10^-17 C

Question 39

A Particle carrying a charge of 2e falls through a potential difference of 3V. The energy acquired by it will be:

A	6 eV
B	1.5 eV
C	0.66 eV
D	3 eV

Question 40

Doubling the distance between the plates of a capacitor, the capacitance:

A	Increases to double
B	Remains constant
C	Decreases to one - fourth
D	Decreases to half

Question 41

Three capacitor of 4?F each are to be connected in such a way that the net capacitance is 6?F. Then

A	All the these three be in series
B	Connect two in series and one in parallel
C	All the these three be in parallel
D	Connect two in parallel and one in series

Question 42

One electron volt is equal to

A	1.6 x 10^-19 Coulomb
B	1.6 x 10^-18 Joul
C	1.6 x 10^-19 N
D	1.6 x 10^-19 Joul

Question 43

The magnitude of an electric field E, such that an electron placed in it would be experience an electric force equal to its weight, is given by

A	mge
B	e/mg
C	mg/e
D	me/g

Question 44

The electric field lines are closer where the field is:

A	Strong
B	Uniform
C	Weak
D	Variable

Question 45

Photocopier and inkjet printer are the application of:

A	Electricity
B	Electronics
C	Electrostatics
D	Magnetism

Question 46

Special organ called Ampullae of lorenzini that are very sensitive to electric field are found in

A	Doges
B	Bats
C	Cats
D	Sharks

Question 47

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid-way between them is:

A	V/2
B	1V
C	Zero
D	2 V

Question 48

If 2?F and 4?F capacitors are connected in series, the resultant capacitance is

A	1.3μF
B	0.5μF
C	8μF
D	6μF

Question 49

The electron volt is the unit of

A	Electric energy
B	Electric current
C	Potential
D	Potential difference

Question 50

A capacitor is charged to store energy U. the charging battery is disconnected. An identical capacitor is now connected in parallel to the first capacitor. The energy in each capacitor is

A	U
B	3U/2
C	U/2
D	U/4

Question 51

Photocopier and inkjet printer are the application of:

A	Electro-magnetism
B	Electrostatics
C	Electricity
D	Magnetism

Question 52

The electric field created by positive charge is:

A	Radially inward
B	Zero
C	Circular
D	Radially Outward

Question 53

Charge on an electron is:

A	9.1 x 10^-19 C
B	1.6 x 10^-19 C
C	1.6 x 10⁺¹⁹ C
D	9.1 x 10^-27 C

Question 54

Which one of the following can be taken as measure of electric field intensity:

A	qA/ε_o
B	φ ε_o/A
C	F/A
D	φe/A

Question 55

Dielectric constant ?_r can be defined as

A	C_vac/C_med
B	C_vac + C_med
C	C_med - C_vac
D	C_med/C_vac

Question 56

If the potential difference across the two plates of a parallel plate capacitor is double then its energy stored in it will be:

A	16 times
B	Remain same
C	2 times
D	4 times

Question 57

A parallel plate capacitor with oil between the plate(?_r = 2) has a capacitance "C". If oil is removed then capacitance of capacitor becomes.

A	C/√2
B	C
C	√2C
D	C/2

Question 58

If the separation between the plates of a capacitor is doubled then its capacitance become

A	Three times
B	One fourth
C	Half
D	Double

Question 59

If a charged body is moved against the electric field, it will gain:

A	P.E
B	Mechincal energy
C	Electrical potential energy
D	K.E

Question 60

SI unit of electric flux is:

A	Nm² c^-1
B	Nm³ c²
C	Nmc^-1
D	Nm^-1 c^-1

Question 61

Electric intensity inside the hollow sphere is:

A	1/ε₀
B	σ/ε₀
C	σ/2ε₀
D	Zero

Question 62

The value of ?_o permittivity for free space is:

A	8.85 x 10^-12NmC^-2
B	8.85 x 10^-12C² N^-1 m^-2
C	8.85 x 10^-12m²N^-1 C²
D	8.85 x 10^-12Nm²C^-2

Question 63

Two charges q₁ and q₂ are placed in vacuum at distance d and force between them is F. If a mentioned of relative permittivity 4 is introduced between them then new force will be:

A	F/2
B	2F
C	F/4
D	4F

Question 64

Two point charges are +2C and +6C repel each other with a force of 12N. If a charge of -4C is given to each of these charges, the force now is

A	12N attractive
B	Zero
C	4N repulsion
D	4N atttactive

Question 65

Capacitance of a Capacitor in Vacuum is given by

A	A/ε_οd
B	Ad/ε_ο
C	Aε₀/d
D	Aε_r /d

Question 66

The number of electrons in one coulomb charge is equal to

A	6.25 x 10^-18
B	1.6 x 10^-19
C	1.6 x 10¹⁹
D	6.25 x 10¹⁸

Question 67

Due to polarization of the dielectric, the electric intensity between the plates of a capacitor:

A	Decreases
B	Remain constant
C	Increases
D	Becomes zero

Question 68

If a charged capacitor is connected to earth its charge.

A	Decrease
B	None of above
C	Increase
D	Remain same

Question 69

The product of resistance and capacitance is

A	Force
B	Acceleration
C	Velocity
D	Time

Question 70

The product of resistance and capacitance is equal to

A	Velocity
B	Current
C	Force
D	Time

Question 71

Which material sheet should be placed between the plates of a parallel plate capacitor in order to increase its capacitance?

A	Iron
B	Tin
C	Mica
D	Copper

Question 72

For computation of electric flux, the surface area should be

A	Parallel
B	Spherical
C	Flat
D	Curved

Question 73

The force between two point charges separated by air is 4 N. When separated by a medium of relative permittivity 2, the force between them becomes;

A	4N
B	2N
C	1/2 N
D	8N

Question 74

Electron volt is the unit of

A	Potential
B	Electric current
C	Electric energy
D	Potential difference

Question 75

When 10¹⁴ electron are removed from a neutral metal sphere then which of the following is the charge on sphere?

A	16μC
B	32μC
C	-32μC
D	-16μC

Question 76

When electron is brought near a - vely charged plate then its electrical P.E.

A	Become zero
B	Increase
C	Remain same
D	Decrease

Question 77

Selenium is a:

A	Photoconductor
B	Conductor
C	Semiconductor
D	Insulator

Question 78

The energy stored in the capacitor is:

A	Gravitational P.E
B	K.E
C	Electric K.E
D	Electric P.E

Question 79

If a dielectric is placed between the plates of a capacitor, its capacitance

A	Remains constant
B	Increases
C	None of these
D	Decreases

Question 80

The constant of proportionality "K" depend upon:

A	Nature of medium between two charges and system of units
B	The system of units
C	Nature of medium between two charges
D	Nature of charge bodies

Question 81

When air is replaced by a dielectric medium of relative permittivity ?r, the maximum capacity of the condenser_____

A	Remains unchanged
B	Increase ε² _r times
C	increase ε_r times
D	Decrease ε_r times

Question 82

The concept of electric field theory was introduced by

A	Coulomb
B	Joseph-Henry
C	Faraday
D	Einstein

Question 83

When dielectric is placed between the plates of capacitor, The value of E between the plates

A	Decrease
B	Zero
C	Infinite
D	Increase

Question 84

If 2?F and 4?F capacitors are connected in parallel, the resultant capacitance is

A	8μF
B	6μF
C	0.5μF
D	1.3μF

Question 85

Selenium is:

A	Semiconductor in dark
B	Insulator in dark
C	Conductor in dark
D	Insulator in light

Question 86

Time constant is defined as the time during which a capacitor charges to_____ of its equilibrium value.

A	0.63%
B	37%
C	Both a and b
D	63%

Question 87

One Joule is equal to

A	6.25 x 10^-18 eV
B	6.25 x 10¹⁹ eV
C	6.25 x 10¹⁸ eV
D	6.25 x 10^-19 eV

Question 88

Two copper spheres of same radii one hollow and other solid are charged to the same potential then.

A	Both will hold same charge
B	Hollow can not be charged
C	Hollow will hold more charge
D	Solid will hold more charge

Question 89

In a charged capacitor, the energy resides in:

A	The negative plate
B	The field between the plates
C	Both the negative and positive plates
D	The positive plate

Question 90

Capacitance of a capacitor does not depend upon:

A	Medium between plates
B	Area of plates
C	Electric field between plates
D	Distance between plates

Question 91

If time constant in RC circuit is small, the capacitor is charged or discharged

A	None of these
B	At constant Rate
C	Rapidly
D	Slowly

Question 92

The relation "-?V/?r" represents

A	Electric intensity
B	Potential difference
C	Electric flux
D	Gauss's Law

Question 93

Two charges 1 ?c and 5?c separated by 20cm, the ratio of electrical forces acting on them will be:

A	1 : 2
B	1 : 5
C	5 : 1
D	1 : 1

Question 94

An ECG records the_______between points on human skin generated by electric process in the heart:

A	Hert Beat
B	Pressure
C	Voltage
D	Pulse Rate

Question 95

If the medium between plates of a capacitor be air or vacuum, then the capacitance of capacitor is:

A	Aε_ο / 2d
B	2Aε_ο / d
C	Aε_ο / d
D	Ad / ε_ο

Question 96

SI unit of permittivity of free space are:

A	C²N^-1m^-1
B	N^-1m²C^-1
C	C²N^-1m^-2
D	Nm²C^-2

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 96 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
51	52	53	54	55
56	57	58	59	60
61	62	63	64	65
66	67	68	69	70
71	72	73	74	75
76	77	78	79	80
81	82	83	84	85
86	87	88	89	90
91	92	93	94	95
96	End

Return

Dear Student If you feel any error in any MCQ then contact us on this Email : 786times.com@gmail.com (administrator) OR Write in Comments….

Features:

*Simple and easiest way to display MCQs.
*on refresh website page,each question and Answer shuffle in MCQs.
*Time Limit is display for each test.
*no login and password required for test.
*each query entertained online via email or WhatsApp.
*score card Display.
*correct answer display at end of each question(if you wrong answered).
*Complete list of Question numbers in cells(blocks) e.g. 1, 2 , 3 ….
*Red cells show your wrong answers.
*Green cells shows correct Answers.
*Your obtained RESULT Percentage show after each Questions.
*Use your computer LAB & Internet to increase ability of STUDENTS.