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WorksheetsM3 - QUIZ NO. 3
Total questions: 14
Worksheet time: 10mins
An e.m.f. of 1.5 kV is induced in a
coil when a current of 4 A collapses uniformly to
zero in 8ms. Determine the inductance of the coil.
3 H
6H
8.25 H
9 H
The ability of a conductor to induce voltage in itself when the current changes is:
CAPACITANCE
INDUCTANCE
RESISTANCE
REACTANCE
FIND THE TOTAL INDUCTANCE:
0.5 H
2 H
4.5 H
9 H
Letter symbol for inductance is:
I
R
C
L
An e.m.f. of 2 kV is induced in a coil when
a current of 5A collapses uniformly to zero
in 10ms. Determine the inductance of the
coil.
4 H
10 H
2 mH
20 H
Formula in total inductance when inductor is in SERIES:
LT = L1 +L2 +L3
1/LT = L1 + L2+ L3
1/LT = 1/L1 + 1/L2 + 1/L3
LT = (L1 + L2) / (L1 X L2)
Unit for inductance is:
Ohms
Henry
Hertz
Farad
What is the self-induced voltage VL across a 4h inductance produced by a current change of 12 A per second?
48 V
3 V
24 V
56 V
Formula in total inductance when TWO inductor is in PARALLEL:
LT = L1 +L2
1/LT = L1 + L2
LT = (L1 x L2) / (L1 + L2)
LT = (L1 + L2) / (L1 X L2)
The current in a 0.4-H inductor is changing at the rate of 200 A/s. What is
the voltage across it?
240 V
50 V
80 V
500 V
Inductance is the characteristic of an electrical circuit that opposes the change of:
CURRENT
VOLTAGE
RESISTANCE
REACTANCE
What is the equivalent inductance of 0.010 H, 22 mH, 86 mH, and
12000 μH connected in series?
0.22 H
0.2092 H
130 H
12108.01 H
Formula in total inductance when inductor is inPARALLEL:
LT = L1 +L2 +L3
1/LT = L1 + L2+ L3
1/LT = 1/L1 + 1/L2 + 1/L3
LT = (L1 + L2) / (L1 X L2)
The self-induced voltage across an inductance L is produced by change in:
CURRENT
VOLTAGE
RESISTANCE
POWER
