CLASS 10 / ELECTRICITY / WORKSHEET-2

Class 10 – Physics

 Ch 12 – Electricity

(WORKSHEET - 2)

Subtopic – (12.2) Potential difference

(12.3) Circuit diagram

MCQs

1.  One joule of work done by a unit charge is equivalent to :

(a) One Volt
(b) Six Volts
(c) Two Volt

(d) can’t be determined

2.  Which of the following units could be used to measure the potential difference? OR, what is the S.I. unit of potential difference?

(a) Ampere
(b) Joule
(c) Volt
(d) Coulomb

3.  Device used to measure potential difference in circuit across the terminals-

(a) Galvanometer
(b) Ammeter
(c) Voltmeter
(d) Barometer

4.  The resistance of Voltmeter should be-

(a) Small
(b) Large
(c) Very large
(d) Doesn’t matter

5.  In an electric circuit voltmeter should be connected in-

(a) Series
(b) Parallel
(c) both (a) and (b)
(d) neither (a) nor (b)

6.  Which of the following statements correctly defines a volt?

(a) a volt is a joule per ampere
(b) a volt is a joule per coulomb
(c) a volt is a joule per unit time
(d) a volt is a joule per ohm

Question / answers

1.   What do you understand by the term potential difference?

2.   Name the device used to maintain potential difference across a conductor.

3.   What is the S.I. unit of potential difference? Which device is used to measure it?

4.   State relationship between potential difference, work done and charge.

5.   What do you mean by saying that potential difference between two points is one volt?

6.   How Ammeter and Voltmeter is connected in a circuit? Explain with the help of a diagram.

7.   State whether a voltmeter or ammeter, which should have low and high resistance. Give reason for your answer.

8.   Draw the circuit symbols for – (a) fixed resistance (b) variable resistance (c) a cell  (d) a battery of 5 cells  (e) an open switch    (f) a closed switch.

9.   What is a circuit diagram? Draw a labeled diagram of a circuit comprising a cell, a resistance, an ammeter, a voltmeter and a closed switch.

10.      A student made an electric circuit shown here ,to measure the current across two lamps

a)    Are the lamps in series or parallel?

b)   The student has made a mistake in circuit, what is the mistake?

c)    Draw the correct circuit diagram.

NUMERICALS

11.      How much work is done when one coulomb of charge moves against the potential difference of one volt?

12.      Calculate the work done in moving a charge of 4 coulomb from a point at 220 volts to another point at 230 volts?

13.      How much energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit?

14.      What is the potential difference between the terminal of the battery if 250 joule of work is required to transfer 20 coulomb of charge from one terminal of battery to another?

15.      A potential difference of 10 volt causes a current of 2 A to flow for 1 minute, how much energy is transferred?

16.      A flash of lighting carries 10 C of charge which flows for 0.01 seconds. If the voltage is 10 MV, what is the energy?

17.      Draw a circuit of comprising an ammeter, a voltmeter, a battery of 3 cells, an open key and a resistance across which potential difference can be measured.

18.      Draw a circuit of comprising a variable resistance, a cell and a closed key.

19.      Draw a circuit of comprising a resistance, a battery of two cells and an open key.

20.      A potential difference across a lamp is 12 V. How many joules of energy are changed, when:

a)    A charge of 5 C passes through it?

b)   A current of 2A flows through it for 10 seconds?