WorksheetsFormative Assessment : Topic 5
Total questions: 10
Worksheet time: 8mins
A uniform 4.5 T magnetic field passes perpendicularly through the plane of wire loop 0.10 m2 in area. What flux passes through the loop?
5.00 Tm2
0.450 Tm2
0.250 Tm2
0.135 Tm2
A 0.200-m wire is moved parallel to a 0.500-T magnetic field at a speed of 1.50 m/s. What emf is induced across the ends of the wire?
2.25 V
1.00 V
0.600 V
zero
A circular coil of area 1.5 m2 and number of turns 200 is placed in a 1.4 T magnetic field which is perpendicular to the plane of the coil as shown in the diagram. If this magnetic field is reduced to 0.20 T in 0.01 s, what is the e.m.f. induced in the coil?
1.8 ×102 V
2.4 ×102 V
3.0 ×104 V
3.6 ×104 V
Self-induced EMF is sometimes also known as
induced EMF
deduce EMF
back EMF
both a and b
The magnetic flux density in a solenoidwhich has 200 turns and cross-sectional area 2 x 10-4 m2 is 5 x 10-5 T when the current in the solenoid is 4 A. What is the value of the
self-inductance of the solenoid?
A 0.5 µH
B 1.0 µH
C 2.0 µH
D 2.5 µH
When the current in a coil is reduced uniformly
from 20 A to zero in 0.50 s, an e.m.f. of 4.0 V is induced in a neighbouring coil. What is the value of the mutual inductance between the two coils?
A 0.10 H
B 0.40 H
C 2.5 H
D 40 H
An inductor of inductance 6.0 H and resistance 24 Ω is connected in series with a battery of e.m.f. 12 V and negligible resistance. What is the maximum energy stored in the inductor?
A 0.75 J
B 1.50 J
C 3.00 J
D 6.00 J
