MCQ
Magnetic field can be defined as the:
  • A
    Space surrounding the magnet in which magnetic force acts.
  • B
    Space surrounding the magnet in which electric force acts.
  • C
    Space surrounding the magnet in which no force acts.
  • D
    None.

Answer

  1. Space surrounding the magnet in which magnetic force acts.

Explanation:

A magnetic field is generated when electric charge carriers such as electrons move through space or within an electrical conductor. It is the space surrounding the magnet in which magnetic force acts. Its intensity is represented by magnetic lines of force.

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 metal sheet is placed in front of a strong magnetic pole. A force needed to:
  1. Hold the sheet there if the metal is magnetic.
  2. Hold the sheed there if the metal is nonmagnetic.
  3. Move the sheet away from the pole with uniform velocity if the metal is magnetic.
  4. Move the sheet away from the pole with uniform velocity if the metal is nonmagnetic. Negative any effect if oaramagnetism, diamagnetism and gravity.
A particle moves along the X-axis as x = u(t - 2s) + a(t - 2s)2.
  1. The initial velocity of the particle is u.
  2. The accelerati?n of the particle is a.
  3. The acceleration of the particle is 2a.
  4. At t = 2s particle is at the origin.

When the kinetic energy of an electron is increased, the wavelength of the associated wave will

(a) Increase

(b) Decrease

(c) Wavelength does not depend on the kinetic energy

(d) None of the above

Internal forces can change:
  1. The linear momentum but not the kinetic energy.
  2. The kinetic energy but not the linear momentum.
  3. Linear momentum as well as kinetic energy.
  4. Neither the linear momentum nor the kinetic energy.

A galaxy is observed to be moving with a velocity of 8600 km-sec–1. If it is at a distance of 430 million light year from us, Hubble constant and corresponding age of the universe are respectively

(a) 2 , 1.49

(b) 2 , 1.58

(c)

(d) None of these

An ammeter with internal resistance 90 Ω reads 1.85 A when connected in a circuit containing a battery and two resistors 700 Ω and  410 Ω  in series. Actual current will be

(a) 1.85 A

(b) Greater than 1.85 A

(c) Less than 1.85 A

(d) None of these

62.5  electrons per second are flowing through a wire of area of cross-section 0.1, the value of current flowing will be

(a) 1 A

(b) 0.1 A

(c) 10 A

(d) 0.11 A

An EM wave radiates outwards from a dipole antenna, with E0 as the amplitude of its electric field vector. The electric field E0 which transports significant energy from the source falls off as:

Masses of three wires of copper are in the ratio of 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are

(a) 1 : 3 : 5

(b) 5 : 3 : 1

(c) 1 : 15 : 125

(d) 125 : 15 : 1

A star emits light of 5500 Å wavelength. Its appears blue to an observer on the earth, it means

(a) Star is going away from the earth

(b) Star is stationary

(c) Star is coming towards earth

(d) None of the above