Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 2 µNm.
 1 µNm.
  200 µNm.
 100 µNm.

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Measurement and Instrumentation
Which of following is not correct?

 A shunt should have a very low resistance.
 Voltmeter should have very high resistance.
  An electronic voltmeter draw appreciable current from the source.
 An ammeter should have a very low resitance.

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