For transistor action: (1) Base, emitter and collector regions should have similar size and doping concentrations. (2) The base region must be vary thin and lightly doped. (3) The emitter-base junction is forward biased and […]
The device can act as a complete electronic circuit is
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(a) junction diode (b) integrated circuit (c) junction transistor (d) zener diode
Correct Answer:
integrated circuit
Explanation:
Integrated circuit can act as […]
Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?
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(a) metallic bonding (b) […]
Which one of the following statement is FALSE about semiconductors?
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(a) Pure Si doped with trivalent impurities gives a p-type semiconductor (b) Majority carriers in a n-type semiconductor are holes (c) Minority […]
A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω and an output impedance of 200Ω. The power gain of the amplifier is
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(a) 500 (b) 1000 […]
The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200 nm falls on it, must be:
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Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å. Another source S₂ is producing 1.02 x 10¹⁵ photons per second of wavelength 5100Å Then, (power of S₂) (power of S₁) is equal to: […]
A beam of cathode rays is subjected to crossed Electric(E) and Magnetic fields(B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by: (Where […]
The thermo e.m.f. E in volts of a certain thermocouple is found to vary with temperature difference θ in ⁰C between the two junctions according to the relation E = 30θ – θ² / 15 […]
Consider the following two statements: (a) Kirchhoff’s junction law follows from the conservation of charge (b) Kirchhoff’s loop law follows from the conservation of energy which is the following is correct?
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(a) […]
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