In the given circuit diagram, a voltmeter'V' is connected across a lam

1.	In the given circuit diagram, a voltmeter'V' is connected across a lamp 'L'. How would (i) the brightness of the lamp and (ii) voltmeter reading 'V' be affected, if the value of resistance 'K is decreased ? Justify your answer.
Answer» (i) Increase. As the value of the base current increases, the collector current will increases proportionally. (ii) Increases Due to the increase in collector current, voltage drop across lamp will increase.

In the given circuit diagram, a voltmeter'V' is connected across a lamp 'L'. How would (i) the brightness of the lamp and (ii) voltmeter reading 'V' be affected, if the value of resistance 'K is decreased ? Justify your answer.

Answer»

(i) Increase.

As the value of the base current increases, the collector current will increases proportionally.

(ii) Increases

Due to the increase in collector current, voltage drop across lamp will increase.