Magnetism and Matter Class 12 Physics MCQs
Magnetism and Matter Class 12 Physics MCQs 1. The earth behaves as a magnet with magnetic field pointing approximately from the geographic (a) North to South (b) South to North (c) East to West (d) West to East Answer: b 2. The strength of the earth’s magnetic field is (a) constant everywhere. (b) zero everywhere. (c) having very high value. (d) vary from place to place on the earths surface. Answer Answer: d 3. Which of the following is responsible for the earth’s magnetic field? (а) Convective currents in earth’s core (б) Diversive current in earth’s core. (c) Rotational motion of earth. (d) Translational motion of earth. Answer Answer: a 4. Which of the following independent quantities is not used to specify the earth’s magnetic field? (a) Magnetic declination (θ). (b) Magnetic dip (δ). (c) Horizontal component of earth’s field (B H ). (d) Vertical component of earth’s field (B V ). Answer Answer: d 5. Let the magnetic field on earth be modelled by that of a point magnetic dipole a
