Measurement and Instrumentation
A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 V it is standardised by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wires is 1000 ohm, then the value of the working current will be

 100 mA.
 10 mA.
 1mA.
 0.5 mA.

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Measurement and Instrumentation
Which of following is not correct?

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

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