When a transistor is used as a switch it is in:
1. Active state
2. Cut off state
3. Saturation state
4. Both cut off state and saturation state are possible
Which of the following is correct for n-type semiconductor?
1. Electron is majority carriers and trivalent atoms are dopants.
2. Electrons are majority carriers and pentavalent atoms are dopants.
3. Holes are majority carriers and pentavalent atoms are dopants.
4. Holes are majority carriers and trivalent atoms are dopants.
4. All of these
In semiconductors, which of the following gives the law of mass action (where symbols have their usual meanings)-
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
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
1. 36 mW
2. 12 mW
3. 144 mW
4. 64 mW
A semiconductor is known to have an electron concentration of cm-3 and hole concentration of cm-3. The semiconductor is
When a p-n junction is forward biased:
1. Depletion region becomes thick
2. p-side is at a higher potential than n side
3. Current flowing is zero
4. Effective resistance is of the order of
A transistor is operated in common emitter configuration at When base current is changed from 10mA to 30mA, it produces a change in emitter current from 2A to 4A, the current amplification factor is