MCQ
Unit of mobility is __________ .
  • A
    $m ^2 V^{-1} S^{-1}$
  • B
    $m ^2 \Omega^* C ^{-1}$
  • C
    $kg ^{-1} Cs$
  • All of the above

Answer

Correct option: D.
All of the above
D

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 step up transformer connected to a 220 V AC line is to supply 22 kV for a neon sign in secondary circuit. In primary circuit a fuse wire is connected which is to blow when the current in the secondary circuit exceeds 10 mA. The turn ratio of the transformer is

(a) 50

(b) 100

(c) 150

(d)  200

An electron is accelerated through a p.d. of 45.5 volt. The velocity acquired by it is (in ms-1)

(a) 4  

(b) 4  

(c)     

(d) Zero

Two thin lenses whose powers are +2D and –4D respectively combine, then the power of combination is

(a) – 2D

(b) + 2D

(c) – 4D   

(d) + 4D

A modified discharge tube is used as a ________:
When an electron strikes the target in a Coolidge tube, its entire kinetic energy:
  1. Is converted into a photon.
  2. May be converted into a photon.
  3. Is converted into heat.
  4. May be converted into heat.
Photons are ________ electrically.
Internal resistance of the cell is:
When the charged particles move in a combined magnetic and electric field, then the force acting is known as _________.

Assertion  :   Annihilation of electron and positron is an example of decay of charges.

Reason      : In the process of annihilation an electron and a positron combine to give a gamma particle.

(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 assertion is false but reason is true.

Potential due to charge q at its own location is: