In common base circuit of a transistor, current amplification factor is 0.95. Calculate the emitter current, if base current is 0.2 mA.
Options
(a) 2 mA (b) 4 mA (c) 6 mA (d) […]
Zenor diode is used for
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(a) amplification (b) rectification (c) voltage regulation (d) produce oscillation in an oscillator
Correct Answer:
voltage regulation
Explanation:
No explanation available. Be the first to write the […]
The output of OR gate is 1(one)
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(a) If both inputs are zero (b) If either or both inputs are one (c) Only if both inputs are one (d) If either input […]
In semiconductor at a room temperature
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(a) The valence band is partially empty and the connection band is partially filled (b) The valence band is completely filled and the conduction band is […]
Identify the wrong statement with reference to solar cell
Options
(a) it is a p-n junction diode with no external bias (b) It uses materials of high optical absorption (c) It uses materials […]
In n-type semiconductor, electrons are majority charge carriers but it does not show any negative charge. The reason is
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(a) electrons are stationary (b) electrons neutralise with holes (c) mobility of electrons […]
The manifestation of band structure in solids is due to
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(a) Heisenberg’s uncertainty principle (b) Pauli’s exclusion principle (c) Bohr’s correspondence principle (d) Boltzmann’s law
Correct Answer:
Pauli’s exclusion principle
Explanation:
No […]
If the band gap between valence band and conduction band in a material is 5.0 eV, then the material is
Options
(a) semiconductor (b) good conductor (c) superconductor (d) insulator
Correct Answer:
insulator
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
Options
(a) Variation of scattering mechanism with temperature (b) Crystal […]
On adjusting the P-N junction diode in forward bias,
Options
(a) Depletion layer increases (b) Resistance increases (c) Both decreases (d) none of these
Correct Answer:
Both decreases
Explanation:
In forward bias arrangement of […]
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