10th Class Physics Important MCQs Chapter No.5 Current Electricity

An electric current in conductors is due to the flow of

Materials that obey Ohm's law and hence have a constant resistance over a wide range of voltages are;

In a dry cell which energy changes into electrical energy?

They are good conductors of electricity and offer less resistance.

The rate of flow of electric charge through any cross-sectional area is;

SI unit of current is;

Most of the electric charge around us is bound in...

After suitable modification galvanometer can be converted into;

If we double both the current and voltage in a circuit while keeping its resistance constant the power

As the charges move around the circuit the electrical potential energy;

In parallel combination of resistors which statement is incorrect?

Which equation is correct for Ohm's law?

Which wire have smaller resistance?

Dry human skin has a resistance of;

Conventional current flow from;

Which voltage is fatal?

Due to flow of charges, produces;

Which provides a safe route for the current to flow through, if the live wire touches the metal casing.

The electric power enter in our house through....

The property of a substance which offers opposition to the flow of current through it is;

In house wiring all appliances are connected with each other;

Power of washing machine is;

The time interval after which the a.c. voltage or current repeats its value is known as its;

The potential difference across a circuit component can be measured by;

The wire is maintained at zero potential is;

Materials having resistance that changes with voltage or current are;

Which very sensitive instrument can detect small current in a circuit?

Which statement is correct for the resistance?

Electric potential and e.m.f

Watt is unit of electric power which is equal to

The unit of e.m.f. which is equal to volt in SI system is;

If V = 1 volt and I = 1 ampere then the value of R is;

The amount of energy supplied by current in unit time is known as

Potential energy per unit charge is;

The conduction of current is only due to movement of free;

What is the voltage across a 6Ω resistor when 3A current passes through it?

The amount of energy delivered by a power of one kilowatt in one hour is called;

Why should be household appliances be connected in parallel with the voltage source?

SI unit of potential difference is;

The current changes direction after equal intervals of time is;

A source of e.m.f is;

Which is the source of current?

When we double the voltage in a simple electric circuit we double the

Which device is connected in series with the live wire in the circuit to protect the equipments when excess, current flows?

Ampere of current that passes through the bulb consumes energy;

Example of insulator is;

In series combination of resistors, the current passing through each resistor is;

The Current arrived from cell or battery is ?

The potential difference between the live wire and neutral wire is;

What happens to the intensity or brightness of the lamps connected in series as more and more lamps are added

In Pakistan, alternating current oscillates every second

What is the power rating of a lamp connected to a 12V source when it carries 2.5A?

The SI unit of resistance is ohm denoted by;

According to Ohm's law;

Which statement is correct about voltmeter?

In bulb current is transformed into;

Which runs generator to produce electrical energy?

Fan converts electrical energy into;

The combined resistance of two identical resistors connected in series is 8Ω.Their combined resistance in a parallel arrangement will be

In metals the current is produced due to flow of;

Power of electric stove is;

In equation V = IR the constant of proportionality and resistance of conductors is;

Which disconnect the supply automatically if current exceeds the normal value?

Which statement is incorrect for resistors connected in series?

A pipe offers less resistance to water flow is it.