Q 18.1 The current flowing into the base of a transistor is 100 micro Ampere. Find its collector current Ic. its emitter current Te and the ratio Ic/Ie, if the value of current gain β is 100.

Q 18.2 Fig.P.18.2 shows a transistor which operates a relay as the switch S is closed. The relay is energized by a current of 10m A. Calculate the value Rg which will just make the relay operate . The current gain β of the transistor is 200. When the transistor conducts, its Vbe can be …

Q 18.3 In circuit (fig.P.18.3), there is negligible potential drop between B and E, where is β is 100, calculate: (i) base current (ii) collector current (iii) potential drop across Rc

Q 18.4 Calculate the output of the op-amp circuit shown in Fig.18.4

Q 18.5 Calculate the gain of the non-inverting amplifier as in Fig. 18.5