MCQ
Which among the following is false?
  • A
    Coulomb force is a central force.
  • B
    The force between two charges depend on the medium between them.
  • C
    Coulomb force is a weak force.
  • D
    The net force on a charge is the vector sum of the forces acting on it due to several other charges.

Answer

  1. Coulomb force is a weak force.

Explanation:

Coulomb force is a strong force. It can be shown that the Coulomb force between two electrons is 1043 times than gravitational force. All the other options are basic properties of Coulomb’s Law.

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

Two long parallel wires carrying equal current separated by 1m, exert a force of 2   on one another. The current flowing through them is

(a) 2.0 A 

(b) 2.0  

(c) 1.0 A  

(d) 1.0  

A convex lens has a focal length f.  It is cut into two parts along the dotted line as shown in the figure.  The focal length of each part will be

(a)  

(b) f

(c)  

(d) 2f

A ray of light transmits from glass (refractive index $=$ $3 / 2$ ) to water (refractive index $=4 / 3$ ). The value of critical angle will be :
A blackbody does not:
  1. Emit radiation.
  2. Absorb radiation.
  3. Reflect radiation.
  4. Refract radiation.

Two electric lamps of 40 watt each are connected in parallel. The power consumed by the combination will be

(a) 20 watt

(b) 60 watt

 

(c) 80 watt

(d) 100 watt

The binding energy of a nucleus is equivalent to:
A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be:
  1. A straight line.
  2. A circle.
  3. A helix with uniform pitch.
  4. A helix with nonuniform pitch.

A steady current i is flowing through a conductor of uniform cross-section. Any segment of the conductor has

(a) Zero charge

(b) Only positive charge

(c) Only negative charge

(d) Charge proportional to current i

A and B are two conductors carrying a current i in the same direction. x and y are two electron beams moving in the same direction

(a) There will be repulsion between A and B attraction between x and y

(b) There will be attraction between A and B, repulsion between x and y

(c) There will be repulsion between A and B and also x and y

(d) There will be attraction between A and B and also x and y

If an electric dipole is placed in an electric field, then the value of the torque acting on it will be: