A gaussian sphere encloses an electric dipole within it. The total flux
A gaussian sphere encloses an electric dipole within it. The total flux across the sphere is
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(a) zero (b) half that due to a single charge (c) double that due to a […]
Physics
A capacitor is used to store 24 watt hour of energy at 1200 volt.
A capacitor is used to store 24 watt hour of energy at 1200 volt. What should be the capacitance of the capacitor?
Options
(a) 120 mF (b) 120 μF (c) 24 μF (d) […]
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)
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(a) E and B are lightly doped and C is heavily doped (b) E is heavily […]
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 […]
Electromagnetic induction is not used in
Electromagnetic induction is not used in
Options
(a) speedometer (b) transformer (c) AC generator (d) room heater
Correct Answer:
room heater
Explanation:
No explanation available. Be the first to write the explanation for […]
A solenoid of length l metre has self inductance L henry. If number of turns
A solenoid of length l metre has self inductance L henry. If number of turns are doubled, its self inductance
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(a) Becomes 2 L henry (b) Becomes 4 L henry (c) Remains […]
A light of wavelength 5000Å falls on a sensitive plate with photoelectric work
A light of wavelength 5000Å falls on a sensitive plate with photoelectric work function 1.90 eV. Kinetic energy of the emitted photoelectrons will be (given, h=6.62×10⁻³⁴ Js)
Options
(a) 0.1 eV (b) 2 […]
Bragg’s law for X-rays is
Bragg’s law for X-rays is
Options
(a) d sin θ = 2nλ (b) 2d sin θ = nλ (c) n sin θ = 2λd (d) None of these
Correct Answer:
2d sin θ […]
A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes
A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted into a 10 A ammeter, the shunt resistance is
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(a) […]
A DC ammeter has resistance 0.1Ω and its current ranges 0-100A. If the range
A DC ammeter has resistance 0.1Ω and its current ranges 0-100A. If the range is to be extended to 1-500, then the following shunt resistance will be required
Options
(a) 0.010Ω (b) 0.011Ω […]