X MCQ based on Chapter Electricity

 MCQ OF ELECTRICITY 

1.The rate of flow of an electric charge is known as : 

(a) Electric potential (b)electric conductance (c)electric current (d)none of these 

Ans : (c) electric current

2.The SI unit of electric current is : 

(a)ohm (b)ampere (c)volt (d)faraday 

Ans :(b)ampere 

3.The instrument used for measuring electric current is : 

(a)ammeter (b)galvanometer  (c)voltmeter (d)potentiometer 

Ans :(a)ammeter 

4.The amount of work done in joules, when one unit electric charge moves from one point to another point in an electric circuit is called : 

(a)electric current (b)electric resistance  (c)electric conductance (d)potential difference 

Ans :(d)potential difference 

5.The unit of potential difference is : 

(a)volt (b)ohm (c)ampere (d)faraday 

Ans :(a)volt

 6.The relation between potential difference (V) and current (I) is :

(a)V α I2 (b) V α 1/I (c) V2 α I (d) V α I 

Ans :(d) V α I

7.The relation between potential difference (V) and current (I) was discovered by : 

(a)Newton (b) Ampere  (d) Volta 

 Ans :  (c) Ohm 

8.The obstruction offered by material of conductor to the passage of electric current is known as :

(a)Resistance (b) Conductance (c) Inductance (d) None of these 

 Ans : (a)Resistance 

9.The SI unit of resistance is :

(a) Newton (b) Ohm (c) Watt (d) Joule Ans : (b) Ohm 

17.Which of the following statement is not true, regarding the electrical set-up for the verification of Ohm’s law: 

(a) The voltmeter is connected in parallel with the known resistance 

(b) The ammeter is connected in series circuit
(c) The rheostat can only increase the resistance in electric circuit

(d)The single key is used to switch on/off the electric circuit 

 Ans : (c) The rheostat can only increase the resistance in electric circuit 

18. A voltmeter is used to find p.d. in any electrical circuit which of the statement given below is true :

(a) A voltmeter is a high resistance instrument and is connected in series circuit

(b) A voltmeter is a low resistance instrument and is connected in series circuit 

(c) A voltmeter is a high resistance instrument and is connected in parallel circuit 

(d)A voltmeter is a low resistance instrument and is connected in series circuit 

Ans : (c) A voltmeter is a high resistance instrument and is connected in parallel circuit  

19. A battery of 12V is connected in series with resisters of 0.2 ohm , 0.3 ohm,0.4 ohm,0.5 ohm and 12 ohm. How much current would flow through the 0.3 ohm resister

 (a) 0.895A (b) 1.11A (c) 0.5A (d)none of these 

Ans : (a) 0.895A
20.Among which of the following resistance does not depend :

(a) length of conductor (b) area of cross-

section (c) temperature (d)density Ans : (d)density 

10.In parallel combination of electrical appliances, total electrical power 

a. Increases b .Decreases  c. Does not change d. Remain same. 

11.The total work done by an electrical appliance during its operation, is called electrical 

a. Current b. Power c. Energy d. Potential 

12.The number of joules in 1kWh is a.3.6x107 b.3.6x106 c.3.6x105 d.3.6x104 

13.When electric current flows through a conductor, it 

a. Gains electrons b. Loose electrons 

c. Becomes hot d. No change is observed.

14.Heating of a current carrying conductor is due to 

a. Loss of kinetic energy by atoms 

b. Loss of kinetic energy by electrons 

c. Attraction between electrons 

D. Repulsion between electrons ; protons 

15.The correct relation between heat produced &electric current flowing

a. H µ I b. HµI2 c. Hµ1 /I d. Hµ1/ I2 

16.The relation between H ;I is called 

a. Newton’ s law b. Faraday’ s law 

c. Joule’s law d. Ohm’ s law 

17.In electric heating appliances, the material of heating element is 

a. Brass b. Nichrome c. Silver d. Copper. 

18. Formula for electric power is 

a. P= V2 I b .P=V I c .P=I/V d. P=V/I. 

19.Lamps of 40 watt&60 watt are connected in parallel, the total power of combination is 

a.40 watt b.60 watt c.24 watt d.100 watt

10.The resistance of a conductor is directly proportional to : 

(a) its area of cross-section (b) density (c) melting point (d) length 

Ans : (d) length

11.The resistance of a conductor is inversely proportional to its : 

(a) area of cross-section (b) length (c) specific resistance (d) density 

 Ans :  (a) area of cross-section 

12.A current of 2A flows trough a conductor whose ends are at a p.d of 4V. The resistance of the conductor is : 

(a) 8 Ω (b) 0.5 Ω (c) 6 Ω (d) 2 Ω 

Ans: (d) 2 Ω

13.The rheostat is used in the circuit to : 

(a) increase the magnitude of current only 

(b) decrease the magnitude of current only

(c) increase or decrease the magnitude of current 

(d) none of these 

Ans :  (c) increase or decrease the magnitude of current  

14.During the verification of Ohm’s law : 

(a) ammeter and voltmeter should be connected in series 

(b) ammeter should be connected in series and voltmeter in parallel 

(c)ammeter should be connected in parallel and voltmeter in series 

(d) ammeter and voltmeter should be connected in parallel 

Ans:  (b) ammeter should be connected in series and voltmeter in parallel
15.Which of the following laboratory apparatus is not used during the verification of Ohm’s law :
(a) Voltmeter (b) Ammeter (c) Galvanometer (d)Rheostat 

 Ans : (c) Galvanometer 

See for more : (Practice) MCQ of Electricity

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