A 60 V peak full wave rectified voltage is applied to a capacitor input filter. If f = 120Hz, RL=10Ω and C=10μF, the ripple voltage (V) is :
Peak to peak ripple voltage for capacitor input filter,
The correct answer is: 5
If a zener diode (Vz = 5V and lz = 10 mA) is connected in series with a resistance and 20V is applied across the combination, then the maximum resistance one can use without spoiling zener action (in kΩ) is :
The principal use of a zener diode is in a voltage regulator. In a voltage regulator, the voltage across the load remains constant over a range of current.
The correct answer is: 1.5
If the peak output voltage of a full-wave rectifier is 10V, its dc voltage (V) is :
The correct answer is: 6.36
For the rectifier circuit shown in figure, the sinusoidal voltage (V1 or V2) at the output transformer has a maximum value of 10 V. The load resistance RL is 1kΩ. What is the value of lav as a multiple of
The correct answer is: 20
What is the diode current (A) in the circuit:
Diode will be in conducting state, when forward biased voltage is applied to it and in non-conducting state, when reverse biased voltage is applied to it. Now, the two batteries may be replaced by a single battery of 2Vwhich will make the diode reverse biased and diode goes to non-conducting state and hence current is zero
The correct answer is: 0
A zener diode has a breakdown voltage of 9.1 V with maximum power dissipation of 364mW. What the maximum current A that the diode can withstand?
The correct answer is: 0.04
For a zener diode, Vz = 20 V and power rating of 0.2W. If the source battery provides a potential difference of 50 V. The minimum value of Rs in Ω that prevents zener diode from being destroyed is.
Maximum zener current
Minimum value of Rs=
The correct answer is: 3000
A silicon diode is in series with a 1.0kΩ resistor and a 5V battery. If the node is connected to the positive battery terminal, the cathode voltage with respect to the negative battery terminal is (in Volts)
The cathode voltage with respect to the negative battery terminal is
The correct answer is: 4.3
If RL = 1kΩ, find the maximum zener current (in mA).
Voltage developed across always.
For maximum current l (and hence also zener current lz),Vin = 25V.
Applying KVL across loop 1, we have
(25 -10 ) = 10 x 103 x l
Hence, maximum zener current.
lz = (15 - 10)
The correct answer is: 5
Find the voltage (V) across the 2kΩ resistance
We know that, zener diode acts as a dc voltage stabilizer, hence, the voltage developed across 2kΩ resistance is 10 V.
The correct answer is: 10