WorksheetsRectifiers and Power Supplies
Total questions: 20
Worksheet time: 7mins
Peak Inverse Voltage of a FWBR is
2Vm
Vm
3Vm
Vm2
The Resistance of an ideal diode in forward biased condition is....
infinity
High
Small
Zero
The ripple factor of a FWBR is..
0.48
0.84
1.21
12.1
A capacitor blocks --------------
ac
dc
both ac & dc
neither ac nor dc
A voltage doubler lowers its
Current
Power
Voltage
Neither of these
A Zener diode is said to be "On" when the applied voltage V is
V≤Vz
V<Vz
V≥Vz
All Of these
A Zener diode has -----------pn Junctions
1
2
3
4
In reverse biased condition a zener diode acts as a constant
Current Source
Power Source
Resistance Source
Voltage Source
A zener diode is destroyed if it
is forward biased
is reverse biased
Carries more than rated current
All Of the above
How many Diodes and Capacitors a Voltage doubler has ?
One each
Two Each
Three Each
As per the requirement
During the +ve Half Cycle ,no of diodes forward biased in a FWBR is
3
4
1
2
The voltage drop across a zener diode when it is forward biased is
zero
∞
Vz
0.7v
A half-wave rectifier circuit with a capacitive filter is connected to a 200 volts, 50 Hz ac line. The output voltage across the capacitor should be approximately------volts
280
480
380
180
The RMS value of a half wave rectifier current is 10 A. Its value for full wave rectification would be
210π A
102 A
2 A
220π A
For single phase supply frequency of 50 Hz, ripple frequency in full wave rectifier is
500
5
100
10
For full-wave rectified sine wave, mean value is
0.707 Im
0.5 Im
0.318 Im
0.6369 Im
Peak inverse voltage for a diode is the
maximum voltage that can be applied across the diode in the conducting direction
voltage corresponding to rated maximum voltage
maximum voltage that can be applied across the diode in the non conducting direction
none of the above.
When voltage applied to a diode is more than PIV, it is likely to result in
Conduction in both direction
Poor regulation
More distortion on output side
Breakdown at the junction
A rectifier is a-----------device
Bilateral
Linear
Non Linear
Passive
A Zener diode is always connected in-------biased condition
Reverse
Forward
Both
None of these
