Question

If negative probe of a multimeter is placed n the base of a p–n–p transistor, then ohm meter reading, with other probe placed on one of the other pins, will show

(1) a low resistance

(2) a high resistance 

(3) zero resistance

(4) (1–) reading

Answer 1

Correct option: (1) a low resistance

Explanation: 

When the negative probe of a multimeter (adjusted to work as an ohm meter) is placed on the base of a p–n–p transistor, and the other probe is placed on the of the other pins, it will show a ‘low resistance’ reading. This is so because this way, of connecting the multimeter probes, corresponds to a forward biasing of the (p–n junction) being investigated.