Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1.34 V.
 1.7 V.
 1 V.
 1.5 V.

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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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