In a common emitter transistor amplifier β= 60, R_o= 5000 Ω and internal resistance of a transistor is 500 Ω. The voltage amplification of amplifier will be

A transistor has a base current of 1 mA and emitter current 90 mA. The collector current will be

A transistor has b= 40. A change in base current of 100 μA, produces change in collector current

Current gain of a transistor in common base mode is 0.95.Its value in common emitter mode is

If the forward voltage in a semiconductor diode is changed from 0.5V to 0.7 V,then the forward current changes by 1.0 mA. The forward resistance of diode junction will be

Distance between body centred atom & a corner atom in sodium(a = 4.225 Å) is

In a full wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

In the half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

The ratio of electron and hole currents in a semiconductor is 7/4 and the ratio of drift velocities of electrons and holes is 5/4, then the ratio of concentrations of electrons and holes will be

On doping germanium with donor atoms of density 10¹⁷cm^–3 its conductivity in mho/cm will be[Given :μ_e= 3800 cm²/V–s and n_i= 2.5× 10¹³ cm^–13]