Question
A large nonconducting sheet M is given a uniform charge density. Two uncharged small metal rods A and B are placed near the sheet as shown in figure:
  1. M attracts A.
  2. M attracts B.
  3. A attracts B.
  4. B attracts A.

Answer

  1. B attracts A.

Explanation:

Charge distribution or M, A & B

So, we can say that M attracts A, M attracts B, A attracts B and 'B' attracts A.

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

For skywave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere

(a) ~ 1.2  

(b) ~  

(c) ~  

(d) ~  

Ultraviolet rays coming from sun are absorbed by:

Speed of light is maximum in

(a) Water 

(b) Air

(c) Glass 

(d) Diamond

A radioactive nucleus undergoes a-emission to form a stable element. What will be the recoil velocity of the daughter nucleus if V is the velocity of a-emission and A is the atomic mass of radioactive nucleus

(a)     

(b)  

(c)   

(d)  

A varying current in a coil change from 10A to 0 in 0.5sec. If the average emf induced in the coil is 220V, the self inductance of the coil is:
A sphere is rolled on a rough horizontal surface. It gradually slows down and stops. The force of friction tries to:
  1. Decrease the linear velocity.
  2. Increase the angular velocity.
  3. Increase the linear momentum.
  4. Decrease the angular velocity.

A potentiometer consists of a wire of length 4 m and resistance 10Ω. It is connected to a cell of e.m.f. 2 V. The potential difference per unit length of the wire will be

(a) 0.5 V/m

(b)  2 V/m

(c)  5 V/m

(d) 10 V/m

A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5 . The magnetic dipole moment of the coil is

(a) 0.15  

(b) 0.3

(c) 0.45

(d) 0.6

Work done in moving a positive charge on an equipotential surface is

(a) Finite, positive but not zero

(b) Finite, negative but not zero

(c) Zero

(d) Infinite

A coil of inductance L is carrying a steady current i. What is the nature of its stored energy

(a)  Magnetic

(b)  Electrical

(c)  Both magnetic and electrical

(d)  Heat