Electrical Measuring Instrument – 1

General . May 24, 2022 . By Biswas J

1. A piece of aluminum wire is stretched to reduce its diameter to half of its original value. Its resistance will become

  1. two times
  2. four times
  3. eight times
  4. sixteen times

 [bg_collapse view=”button-green” color=”#4a4949″ icon=”arrow” expand_text=”Answer” collapse_text=”Close” ]sixteen times[/bg_collapse]

31. Semiconductors have …….. temperature coefficient of resistance

  1. zero
  2. negative
  3. positive
  4. none of the above

32. The thermal speed of electrons is of the order

of

(1) lms(ii) 10oms

(ii) 10-ms(iv) 3 x 10oms

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