2nd Year Physics Chapter 13 MCQs with Answers Current Electricity

If you want to prepare for the 2nd Year Physics Chapter 13 MCQs with Answers Current Electricity then this is the place. It’s the opposite of electrostatics and in Current Electricity, we study the changes that are in motion. For this, first, you need to know what Electric Current is. Then it is also important to know the sources of Electric Current and its effects. Ohm’s law defines the relationships between current, potential difference, and resistance. Then there is some importance of resistance and emf that is the energy supplied to unit charge by the cell. After this, there are Kirchhoff’s rules that are very important. You can now move towards the MCQs section where you will be given four choices. Select the right one. Through this, you will be able to prepare for your entrance test.

2nd Year Physics Chapter 13 MCQs with Answers Current Electricity

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Physics Chapter 13

1 / 20

Rheostat connected in parallel with a battery acts as a

Variable resistor

Potential divider

Both A and B

Bridge

2 / 20

If a potentiometer of length 4 meters is connected to a supply of 3 V and balancing length is 2.0-meter then-unknown emf of the cell is

1.0 V

2.0 V

1.5 V

2.5 V

3 / 20

If resistances in the successive arms of a balanced Wheatstone bridge are 3 ohms respectively, then unknown resistance in the fourth arm is

6 ohm

2 ohm

3 ohm

4 ohm

4 / 20

A person has five resistances each of value 1/5 ohm. The minimum resistance he can obtain by combining them is

1/50 Ω

1/25 Ω

1/10 Ω

1/5 Ω

5 / 20

A wire has a resistance of 12 Ω. It is bent in the form of a circle. The effective resistance between two points across a diameter is

3 Ω

12 Ω

6 Ω

254 Ω

6 / 20

Which material has a negative temperature coefficient of resistivity?

Steel

Iron

Tungsten

Silicon

7 / 20

In short circuit, resistance is _______ and in open circuit, resistance is ______.

Zero,∞

1, zero

∞, zero

Variable, zero

8 / 20

If the balancing length is one-sixth of the length of the potentiometer and a cell of emf 1.5 V is connected across it then the voltage of the accumulator (driver cell) is

6 V

9 V

3 V

4 V

9 / 20

If a wire is cut into two equal halves then the resistivity of each half

In doubled

Is halved

Remains the same

In increased by 4 times

10 / 20

A cell having pure emf of 2.0 V with an internal resistance of 0.5 Ω. When short-circuited its current would be

2 A

8 A

4 A

Infinite

11 / 20

Electromotive force can be _________ terminal potential difference.

Less than

Greater than

Equal to

All is possible

12 / 20

The potential difference between the terminal of a battery in an open circuit is 2.2 V when it is connected across a resistance of 6 Ω, the potential falls to 1.8 V. The internal resistance of the battery is

33 Ω

1.11 Ω

1 Ω

1.2 Ω

13 / 20

When maximum power is dissipated in the external circuit then the terminal potential difference would be

Half than emf

Double than emf

Equal to an internal potential drop

Both A and C

14 / 20

The slope of I-V graph for an ohmic substance gives

Conductance

Resistance

Conductivity

Temperature coefficient of resistance

15 / 20

In the case of tungsten filament, the deviation of the I-V graph from a straight line is due to

Increase in potential difference

Increase in current

Increase in resistance

All of these

16 / 20

Siemen m^–1 are the units of

1/ Conductivity

1/ Resistivity

Conductance

Resistance

17 / 20

A piece of a certain material has a resistance of 100 Ω at 0^o C and 10 Ω at 18^o C. The material is of

Carbon

Germanium

Silicon

None of these

18 / 20

The working of an electric iron is based upon:

Ohm’s Law

Joule’s Law

Faraday’s Law

Ampere’s Law

19 / 20

All of the following statements are incorrect except

Silver is the best conductor followed by aluminum and then copper

Copper is the best conductor followed by silver and then aluminum

Copper is the best conductor followed by aluminum and then silver

Silver is the best conductor followed by copper and then aluminum

20 / 20

If 1.6 A of current flows through a copper wire of a cross-sectional area of 1 mm² and if the free electron density in copper is 8 x 10²⁸ per m³ then the drift velocity of electrons in ms^-1

12.5 x 10^–4

1.25 x 10^–4

2.5 x 10^–5

12.5 x 10^–5

Your score is

2nd Year Physics Chapter 13 MCQs with Answers Current Electricity

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