The conductivity of an n-type semiconductor whose density of conduction electrons is , Density of holes is , Mobility of conduction electrons is and Mobility of holes is will be
1.
2.
3.
4.
The current through an ideal p-n junction diode shown in the circuit will be -
1. 5 A
2. 0.2 A
3. 0.6 A
4. Zero
In a common-emitter transistor, the phase difference between input and output is:
1. Zero
2. /2
3. /3
4.
A semiconductor is known to have an electron concentration of cm-3 and a hole concentration of cm-3. The semiconductor is:
1. n-type
2. p-type
3. intrinsic
4. insulator
In semiconductors, which of the following gives the law of mass action?
(where symbols have their usual meanings.)
1. \(n_i=n_e=n_h\)
2. \(n_i^2=n_en_h\)
3. \(n_h>> n_e\)
4. \(n_h<<n_e\)
In a common emitter transistor amplifier, the audio signal voltage across resistance of 1 k is 2V. If the base resistance is 200 and the current amplification factor is 50, the input signal voltage will be
(1) 4 mV
(2) 8 mV
(3) 16 mV
(4) 32 mV
The given electrical network is equivalent to
1. AND gate
2. OR gate
3. NOR gate
4. NOT gate
In a common-emitter transistor amplifier, the audio signal voltage across the collector is 3 V. The resistance of the collector is 3 k. If the current gain is 100 and the base resistance is 2 k, the voltage and power gain of the amplifier are:
1. 200 and 1000
2. 15 and 200
3. 150 and 15000
4. 20 and 2000