Question

Diode is used as a/an

(a) Oscillator

(b) Amplifier

(c) Rectifier

(d) Modulator

Answer

(c) Rectifier

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Similar questions

A galvanometer having a resistance of 8 ohm is shunted by a wire of resistance 2 ohm. If the total current is 1 amp, the part of it passing through the shunt will be

(a) 0.25 amp

(b) 0.8 amp

(c) 0.2 amp

(d) 0.5 amp

Choose the wrong statement of the following:

The potential difference between point A & B is

(a)  

(b)  

(c)  

 (d) 0

In a junction diode, the holes are due to

(a) Protons

(b) Neutrons

(c) Extra electrons

(d) Missing of electrons

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(a) 100 Gauss

(b) 400 Gauss

(c) 50 Gauss

(d) 200 Gauss

A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if

(a) R = r

(b) R < r

(c) R > r

(d) R = r/2

Find the false statement.

Faraday's laws are consequence of conservation of

(a) Energy

(b) Energy and magnetic field

(c) Charge

(d) Magnetic field

The photoelectric effect was successfully explained by
A tank containing a liquid has turns of wire wrapped around it, causing it to act as an inductor. The liquid content of the tank can be measured by using its inductance to determine the height of the liquid level in the tank. The inductance of the tank changes from a value of Lo​ corresponding to a relative permeability of 1 when the tank is empty to value Lf​ corresponding to a relative permeability Xm​ (relative permeability of liquid) when the tank is full. The appropriate electronic circuit can determine the inductance correct upto 5 significant figures and thus the effective relative permeability of the combined air and liquid within the rectangular has height D. The height of the liquid level in the tank is d. Ignore the fringing effects. Assume tank is fitted with HgXHg ​= 2.9 × 105.
Express d as a function of L, inductance corresponding to a certain liquid height L0​,Lf​ and D.