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If one coulomb of charge is flowing in one minute, it is called ‘ampere’.

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Important Questions on Electric Current and Its Effects

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Define potential difference.

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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

MEDIUM

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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.

MEDIUM

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Conductivity of superconductors is

MEDIUM

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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>Electric Current and Its Effects>Symbols of Electronic Components

$15$ 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>Electric Current and Its Effects>Symbols of Electronic Components

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

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MEDIUM

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Draw any four symbols of the components used in electric circuit.

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

How much work is done in moving a charge of

3 C

across two points having a potential difference

15 V

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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?

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Write the conventional symbol of the following component used in electric circuit diagram-

A wire joint

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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>Electric Current and Its Effects>Symbols of Electronic Components

Write the conventional symbol of the following component used in electric circuit diagram-

Electric bulb

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

How much work is done in moving a charge of

5 C

across two points having a potential difference

15 V ?

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Write the conventional symbol of the following component used in electric circuit diagram-

An electric cell

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

Define the unit of current.

HARD

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

In a particle accelerator, a current of

500 μ A

is carried by a proton beam in which each proton has a speed of

3 \times 10^{7} m / s

. The cross-sectional area of the beam is

1.50 m m^{2} .

The charge density in this beam (in

C / m^{3})

is close to

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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

6 V

battery?

EASY

Science>Physics>Electric Current and Its Effects>Symbols of Electronic Components

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:

If one coulomb of charge is flowing in one minute, it is called ‘ampere’.

Important Questions on Electric Current and Its Effects

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