MCQ
How is the potential within and on the surface of a conductor?
  • A
    Indirectly proportional
  • B
    Directly proportional
  • C
    Zero
  • D
    Constant

Answer

  1. Constant

Explanation:

Electric field at any point is equal to the negative of the potential gradient. But inside a conductor, the electric field is zero. Hence, the electric potential is constant throughout the volume of a conductor and has the same value on its surface.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A point charge q is rotated along a circle in the electric field generated by another point charge Q. The work done by the electric field on the roatating charge in one complete revolution is:
  1. Zero.
  2. Positive.
  3. Negative.
  4. Zero if the charge Q is at the centre and nonzero otherwise.
According to classical theory, path of electron in Rutherford model :

In an experiment, the saturation in the plate current in a diode is observed at 240V. But a student still wants to increase the plate current. It can be done, if

(a) The plate voltage is increased further

(b) The plate voltage is decreased

(c) The filament current is decreased

(d) The filament current is increased

A metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (for example, by cooling it), the current will:
  1. Increase.
  2. Decrease.
  3. Remain constant.
  4. Become zero.
One of the specialties of nuclear reactions is that in their disintegrated or fused part :

An electric dipole is kept in non-uniform electric field. It experiences

(a) A force and a torque

(b) A force but not a torque

(c) A torque but not a force

(d) Neither a force nor a torque

A 4 mF capacitor, a resistance of 2.5 MW is in series with 12 V battery. Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor. [Given ln(2)= 0.693]

(a) 13.86 s

(b) 6.93 s

(c) 7 s      

(d) 14 s

Assertion :   Moon is seen as it partly reflects the sun light falling on it

Reason     :  Moon is a satellite of earth. It does not emit light of its own

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

The possible quantum number for 3d electron are

(a) n = 3, l = 1,  

(b) n = 3, l = 2,  

(c) n = 3, l = 1,  

(d) n = 3, l =0,  

The tail of the comet is due to

(a) Vaporisation of water on the comet

(b) Sublimation of vapour in the comet

(c) Cooling of water in the comet

(d) Vaporisation of heat in the comet