Electrostatics Test 01

Total Questions: 26

1 - A positive electric charge:

A ) Attracts other positive charge
B ) Repels other positive charge ✅
C ) Attracts a neutral charge
D ) Repels a neutral charge

2 - An object gains excess negative charge after being rubbed against another object, which is:

A ) neutral
B ) negatively charged ✅
C ) positively charged
D ) either a,b, or c

4 - When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?

A ) The rod and the paper are oppositely charged
B ) The rod acquires a positive charge
C ) The rod and the paper have the same charges
D ) The rod acquires a negative charge ✅

6 - The Coulomb's law is valid for the charges which are:

A ) moving and point charges
B ) moving and non -point charges
C ) stationary and point charges ✅
D ) stationary and large size charges

7 - A positive and a negative charge are initially 4cm apart. When they are moved closer together so that they are now only 1cm apart, the force between them is:

A ) 4 times smaller than before
B ) 4 times larger than before
C ) 8 times larger than before
D ) 16 times larger than before ✅

10 - Electric field lines:

A ) always cross each other
B ) never cross each other ✅
C ) cross each other in the region of strong field
D ) cross each other in the region of weak field

11 - Capacitance is defined as:

A ) VC
B ) Q/V ✅
C ) QV
D ) Q/V

12 - One micro coulomb charge is equal to:

A ) 10-³ C
B ) 10-³ C
C ) 10⁶ C
D ) 10-⁶ C ✅

13 - In SI the unit of charge is:

A ) Joule
B ) Volt
C ) Coulomb ✅
D ) Watt

14 - One coulomb is equal to charge of electrons:

A ) 6.25× 10-¹⁹
B ) 6.25 × 10¹⁹
C ) 6.25 × 10¹⁸ ✅
D ) 6.25 × 10-¹⁸

16 - The electrostatic force acting on two charges each of IC separated by 1m is about:

A ) 9× 10⁹ N ✅
B ) 9×10-⁹ N
C ) 9×10⁸ N
D ) 9× 10-⁸ N

17 - Value of 'K' depends upon:

A ) System of unit
B ) Nature of medium
C ) Both (a) and (b)
D ) None of these

18 - Electric field lines were introduced by:

A ) Faraday ✅
B ) Newton
C ) Coulomb
D ) Joule

19 - Positive charge in an electric field always tend to move:

A ) Does not move
B ) From lower to higher potential
C ) From higher to lower potential ✅
D ) All of these

20 - The unit of electrical energy is:

A ) Joule
B ) Watt
C ) Volt
D ) electron volt ✅

21 - The unit of capacitance is:

A ) Farad ✅
B ) Volt
C ) Watt
D ) Coulomb

22 - I nano Farad is equal to:

A ) 1× 10-¹² F
B ) 1×20-⁹ F
C ) 1×10-⁹ F ✅
D ) 1 ×10-⁶ F

23 - Pico Farad is equal to:

A ) 10-⁹ F
B ) 10¹² F
C ) 10-¹² F ✅
D ) 10-⁶ F

24 - SI unit of electric intensity is:

A ) watt
B ) NC-¹ ✅
C ) Ns-¹
D ) Nm

25 - Electric intensity is a quantity:

A ) Scalar
B ) Vector ✅
C ) Base
D ) None of these

26 - Electric potential is a quantity:

A ) Scalar ✅
B ) Vector
C ) Base
D ) All of these