Zener Diode

Q.

When a Zener diode is operated in forward biased then .

Q.

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

1. NOR gate

2. AND gate

3. NAND gate

4. OR gate

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.

The diode that is specially designed to work only in reverse breakdown region is

Q. Why is it necessary to swipe the credit card rather than holding it motionless in the card readers slot?​

Q.

The electrical power of an electrical appliance cannot be expressed by,

1. VI

2. I²R

3. I²/R

4. V²/R

Q. two bulbs with power and potential difference (60W, 220V) and (100W, 220V) are connected in series with a battery . which bulb will glow brighter and why

Q.

How is the emf across primary and secondary coils of a transformer related with the number of turns of coil in them?

Q. An ammeter is
(A) Used to measure current in circuit
(B) Used to measure potential difference
(C) Has low resistance and connected in series
(D) Has high resistance and connected in series
The true options(s) is/are

1. Only (A)
2. (A) and (D)
3. (B) and (D)
4. (A) and (C)

Q. a given length of a wire is doubled on itself and this process is repeated once again by what factor does the resistance of the wire change

Q. Which one is false

1. all of the above are true
2. shift registers operate in serial fashion one bit at a time
3. parallel processing techniques are economically feasible
4. register with parallel load operate with all the bits of the word simultaneously