Physics Past Questions and Answers

The d.c generator has essentially the same components as the a.c generator except the presence of?

A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer.

caesium has a work function of 3 x 10<sup style='font-size: smaller;'>-19</sup>J. the maximum energy of liberated electrons when it is illuminated by light of frequency 6.7 x 10<sup style='font-size: smaller;'>14</sup><br/>HZ is?<br/>[h = 6.6 x 1010<sup style='font-size: smaller;'>-34</sup>Js]

zener diode is used for?

When a pure semiconductor is heated, its resistance