HARD

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What is the resistance between A and B in the following circuit?

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Important Questions on Electricity

EASY

Science>Physics>Electricity>Circuit Diagram

Define potential difference.

EASY

Science>Physics>Electricity>Circuit Diagram

Write the circuit symbol of p-n-p transistor.

MEDIUM

Science>Physics>Electricity>Circuit Diagram

What is the meaning of the statement “The potential difference between two points is

1 V

” ? Name the device used to measure potential difference. What is resistance of a conductor? What is electric power? Write three formulae used to find electric power.

EASY

Science>Physics>Electricity>Circuit Diagram

Two cells of emf $2 E$ and $E$ with internal resistance $r_{1}$ and $r_{2}$ respectively are connected in series to an external resistor $R$ (see figure). The value of $R,$ at which the potential difference across the terminals of the first cell becomes zero is

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MEDIUM

Science>Physics>Electricity>Circuit Diagram

Several lamps of

50 W

and

100 V

rating are available. How many of them can be connected in parallel across a battery of a

120 V

of internal resistance

10 Ω

, so that all bulbs glow in full power?

EASY

Science>Physics>Electricity>Circuit Diagram

How much work is done in moving a charge of

5 C

across two points having a potential difference

15 V ?

EASY

Science>Physics>Electricity>Circuit Diagram

In the given circuit diagram, identify the objects marked as $1, 2, 3$ .

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EASY

Science>Physics>Electricity>Circuit Diagram

$15$ cells each of emf $2$ volt are connected in series but $2$ of them are connected wrongly. Calculate the emf of the combination.

EASY

Science>Physics>Electricity>Circuit Diagram

How much work is done in moving a charge of

3 C

across two points having a potential difference

15 V

EASY

Science>Physics>Electricity>Circuit Diagram

How can a continuous flow of current be obtained? What are the sources of energy and name of the devices required for continuous flow of current?

HARD

Science>Physics>Electricity>Circuit Diagram

The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of

2 Ω

. The value of internal resistance of each cell is

EASY

Science>Physics>Electricity>Circuit Diagram

Four bulbs

B_{1}

B_{2}

B_{3}

and

B_{4}

100 W

each are connected to

220 V

main as shown in the figure. The reading in an ideal ammeter will be

EASY

Science>Physics>Electricity>Circuit Diagram

How much work is done in moving a charge of $2 C$ across two points having a potential difference $10 V$ ?

EASY

Science>Physics>Electricity>Circuit Diagram

How much energy is given to each coulomb of charge passing through a

6 V

battery?

EASY

Science>Physics>Electricity>Circuit Diagram

In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW. The voltage of the electric mains is 220 V. The minimum capacity of the main fuse of the building will be:

EASY

Science>Physics>Electricity>Circuit Diagram

Electric current is flowing from _____.

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