Magnetic Flux — Practice Quiz

Question 1

A circular loop of radius 0.1 m is placed in a uniform field B = 0.5 T at 60° to the area-normal. The flux is:

Accepted Answer

0.0078 Wb

Answer

0.0157 Wb

Answer

0.0314 Wb

Answer

0.0079 Wb

Question 2

Flux through a closed surface containing a bar magnet is:

Accepted Answer

Zero (no magnetic monopoles)

Answer

Positive

Answer

Negative

Answer

Depends on magnet strength

Question 3

A 20-turn coil of area 50 cm² is placed in B = 0.4 T parallel to the area-vector. Total flux linkage:

Accepted Answer

0.04 Wb

Answer

0.4 Wb

Answer

0.004 Wb

Answer

4 × 10⁻⁵ Wb

Question 4

Flux is MAXIMUM when:

Accepted Answer

B perpendicular to loop plane (parallel to n̂)

Answer

B in the loop plane

Answer

Coil rotates quickly

Answer

Loop is small

Question 5

Unit of magnetic flux can also be written as:

Accepted Answer

V·s

Answer

T·m

Answer

A·m

Answer

C·s