Zener Diode

Q.
The circuit above works as a $12\text{V}$ dc regulated voltage source. The power dissipated (in $\text{mW}$) in each diode is (considering both Zener diodes as identical and operating in breakdown mode)

Q. A Zener diode:

1. is a battery.
2. has a constant voltage in the breakdown region.
3. has a barrier potential of 1 V.
4. is forward biased.

Q. In the case of p-n junction diode at a high value of reverse bias voltage, the current rises sharply. The value of reverse bias voltage is known as

1. cut-off voltage
2. inverse voltage
3. zener voltage
4. critical voltage

Q.

In the circuit shown, A and B represent two inputs and C represents the output. The circuit represents

1. OR gate

2. NAND gate

3. NOR gate

4. AND gate

Q.

In the following, which one of the diodes is reverse biased?

1. 

2. 

3. 

4. 

Q. A zener diode having breakdown voltage equal to $15V$, is in a voltage regulator circuit as shown in figure. The current through the diode is

1. $5mA$
2. $10mA$
3. $15mA$
4. $20mA$

Q. A Zener diode, having breakdown voltage equal to $15V$, is used in a voltage regulator circuit shown in figure. The current through the diode is:

1. $5mA$
2. $15mA$
3. $10mA$
4. $20mA$

Q. A zener diode having breakdown voltage equal to $15V$, is in a voltage regulator circuit as shown in figure. The current through the diode is

1. $5mA$
2. $10mA$
3. $15mA$
4. $20mA$

Q. Find the minimum and maximum load currents for which the zener diode as shown in figure will maintain regulation. Given, $V_Z=10V,R_Z=0\Omega ,R=450\Omega ,I_Z\left(min\right)=2mA$ and $I_Z\left(max\right)=60mA$

1. $0mA,33.3mA$
2. $31.3mA,0mA$
3. $2mA,31.3mA$
4. $31.3mA,31.3mA$

Q. A Zener diode is connected to a battery and a load as shown below: The current $I,I_Z$ and $I_L$ are respectively :

1. $12.5mA,735mA,5mA$
2. $12.5mA,5mA,7.5mA$
3. $15mA,7.5mA,7.5mA$
4. $15mA,5mA,10mA$