Physics – Class 12 Practice Test 5

1. Both magnetization and magnetic intensity have the same unit.

False

True

2. Identify the expression for magnetic induction from the following.

B = μ_o(H+I)

B = μ_o(\(\frac {H}{I}\))

B = μ_o(H×I)

B = μ_o(H-I)

3. Which of the following is a unit of magnetic flux?

Maxwell

Ampere

Gauss

Tesla

4. At a given place on the Earth’s surface, the horizontal component of Earth’s magnetic field is 9 × 10^-5 T and the resultant magnetic field is 180 × 10^-6. Calculate the angle of dip at this place.

60^o

45^o

0^o

30^o

5. The induced emf persists only as long as the change in magnetic flux continues.

False

True

6. Which among the following is denoted by δ?

Magnetic declination

Magnetic inclination

Horizontal component

Magnetic meridian

7. Calculate the magnetic flux when the magnetic field is perpendicular to the surface area.

Maximum

Depends on the surface area

Zero

Minimum

8. Voltage sensitivity and current sensitivity are related.

False

True

9. Pick out the material that cannot be used to make permanent magnets.

Zinc

Steel

Aluminum

Copper

10. The line of force in a magnetic field represents the direction at each point that a magnetic needle placed at the point takes up. Do they also represent the direction of the force on a moving charge at each point?

Not possible

Represents translatory motion

Represent circular motion

Represent tangential motion