Measurement and Instrumentation
When testing a coil having a resistance of 10 ohms, resonance occurred when the oscillator frequency was 10 MHz and rotating capacitor was set at 500/2π pF. The effective value of the Q of the coil is

 20.
 54.2.
 25.4.
 31.4.

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Measurement and Instrumentation
Which of following is not correct?

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

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