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Power Electronics
Power Electronics Multiple Choice
Quiz 1
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Q.1
A diode rectifier with a C filter will have average output voltage _______ than that obtained by a rectifier without the C filter.
a) lower than
b) higher than
c) same as
d) none of the mentioned
Q.2
An inductor filter connected in series with a resistive load provides a
a) smoothing of the output voltage waveform
b) smoothing of the input voltage waveform
c) smoothing of the output current waveform
d) smoothing of the input current waveform
Q.3
In the below given configuration, L is connected as a filter across the R load.
a) 2Vm/R
b) 2Vm/πR
c) Vm/πR
d) Vm/R
Q.4
The current ripple factor (CRF) is the ratio of
a) Average value/RMS value
b) RMS value/Average value
c) Average value/Maximum value
d) Maximum value/RMS value
Q.5
In case of an L filter, the ripple current increases with
a) increase in Load
b) decrease in Load
c) increase in the value of L
d) ripple current never increases
Q.6
In case of a C filter, if R (load resistance) is increased
a) ripple factor is reduced
b) ripple factor is increased
c) ripple factor is not affected
d) increases noise in the circuit
Q.7
When a certain type of filter is connected across the R load, of a full wave bridge diode biased rectifier the following output current waveform is obtained.
a) L filter
b) C filter
c) LC filter
d) None of the above mentioned
Q.8
C filters are suitable for ___________ load resistances and L filters are suitable for _____________ load resistances.
a) low, low
b) high, high
c) high, low
d) low, high
Q.9
An LC filter will have ripple factor value___________ (For the same value of L & C)
a) lower than that obtained by L filter but higher than that obtained by C filter
b) lower than that obtained by C filter but higher than that obtained by L filter
c) lower than that obtained by either L or C filter
d) higher than that obtained by either L or C filter
Q.10
In a single-phase full wave rectifier ___________ order harmonics are the most dominant
a) first
b) second
c) third
d) fourth
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