The necessary condition in making of a junction transistor
The necessary condition in making of a junction transistor (E- emitter, B- base and C- collector)
Options
(a) E and B are lightly doped and C is heavily doped (b) E is heavily […]
Electronic Devices
An amplifier has a voltage gain Av=1000. The voltage gain in dB is
An amplifier has a voltage gain Av=1000. The voltage gain in dB is
Options
(a) 30 dB (b) 60 dB (c) 3 dB (d) 20 dB
Correct Answer:
60 dB
Explanation:
No explanation […]
A Zenor diode has a contact potential of 1 V in the absence of biasing. It undergoes
A Zenor diode has a contact potential of 1 V in the absence of biasing. It undergoes Zenor breakdown for an electric field of 10⁶ V/m at the depletion region of p-n junction. If the […]
A n-p-n transistor is connected in common emitter configuration in a given amplifier.
A n-p-n transistor is connected in common emitter configuration in a given amplifier. A load resistance of 800Ω is connected in the collector circuit and the voltage drop across it is 0.8 V. If the […]
A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz
A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz for the amplitude modulation. The value of √LC is
Options
(a) 1/2πx10⁶ (b) 1/2×10⁶ (c) 1/3πx10⁶ (d) 1/4πx10⁶
Correct […]
A common emitter amplifier is designed with n-p-n transistor (α=0.99).
A common emitter amplifier is designed with n-p-n transistor (α=0.99). The input impedence is 1kΩ and load is 10kΩ. The voltage gain will be
Options
(a) 9900 (b) 99 (c) 9.9 (d) 990
Correct […]
Pure Si at 300 k has equal electrons (nₑ) and hole (nh) concentrations
Pure Si at 300 k has equal electrons (nₑ) and hole (nh) concentrations of 1.5×10⁺¹⁶ m⁻³. Dopping by indium, nh increases to 3×10²² m⁻³. What is nₑ in doped Si?
Options
(a) 2.5×10⁹ […]
Which gate can be obtained by shorting both the input terminals of a NOR gate?
Which gate can be obtained by shorting both the input terminals of a NOR gate?
Options
(a) NOT (b) OR (c) AND (d) NAND
Correct Answer:
NOT
Explanation:
No explanation available. Be the […]
A common emitter amplifier gives an output of 3 V for an input of 0.01 V.
A common emitter amplifier gives an output of 3 V for an input of 0.01 V. If β of the transistor is 100 and the input resistance is 1 kΩ, then the collector resistance is […]
A Si and a Ge diode has identical physical dimensions. The bandgap in Si is larger
A Si and a Ge diode has identical physical dimensions. The bandgap in Si is larger than that in Ge. An identical reverse bias is applied across the diodes
Options
(a) The reverse […]