Q1 It is possible to have a positively charged body at
- Zero potential
- Negative potential
- Positive potential
- All of these
- All of these
Q2 Electric potential of Earth is taken as zero because Earth is a good......
- Insulator
- Conductor
- Semiconductor
- Dielectric
- Conductor
Q3 In bringing an electron towards another electron, the electrostatic potential energy of the system –
- Increases
- Decreases
- Remains unchanged
- Becomes zero
- Increases
Q4 Two equal and opposite charges +q and –q are situated at x distance from each other, the value of potential at very far point will depend on
- Only on q
- Only on x
- On qx
- On q/x
- On qx
Q5 1 eV = 1.6 x `10^{-19}` (T/F)
- True
- False
- True
Q6 The potential within and on the surface of a conductor is
- Zero
- Constant
- Can be zero or constant
- None of these
- Constant
Electric field at any point is equal to the negative of potential gradient. But inside a conductor , Electric field is zero . Hence, electric potential is constant throughout the volume of conductor and has same value on its surface
Q7 The phenomenon of making a region free from any electric field is .
- Gauss theorem
- Corona discharge
- Electrostatic shielding
- Faraday’s cage
Electrostatic shielding
The phenomenon of making a region free from any electric field is called electrostatic shielding . It is based on the fact that the electric field vanishes inside the cavity of a hollow conductor
Q8 Which of the following quantity is measured in kelvin?
- Time
- Mass
- distance
- temperature
temperature
Q9 Which of the following is not a fundamental quantity?
- Time
- Mass
- velocity
- temperature
Velocity
Q10 The SI unit of luminous intensity is
- Second
- Candela
- mole
- m/s
Candela
