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(a) For given transistor circuit, the base current is 10muA and the collector current is 5.2 mA. Can this transistor circuit be used as an amplifier. Your answer must be supported with proper explanation. (b). For a common emitter amplifier, current gain is 69. if the emitter current is 7 mA then calculate the base current and collector current.

In a series L-R circuit (L=35 mH and R=11 Omega) , a variable emf source (V=V_(0) sin omega t) of V_(rms)=220V and frequency 50 Hz is applied. Find the current amplitude in the circuit and phase of current with respect to voltage. Draw current-time graph on given graph (pi=22/7) .

A long solenoid has 200 turns per cm and carries a current of 2.5 amps. The magnetic field at its centre is (mu_(0)=4pixx10^(-7)"weber"//amp-m)

A 35% solution of LiCl was electrolyzed by using a 2.5 A current for 0.8 h. Assuming the current efficiency of 90% , find the mass of LiOH produced at the end of electrolysis. ( Atomic mass of Li=7)

The current gain for common emitter amplifier is 69. If the emitter current is 7.0 mA , find (i) base current and (ii) collector current.