Q1. The Q-meter works on the principle of
(A) parallel resonance circuit
(B) mutual inductance
(C) series resonance circuit
(D) self inductance

Q2. The rectifier amplifiers meter are used at...... frequency
(A) audio
(B) power
(C) high
(D) none of these

Q3. the secondary emissions of electrons is due to
(A) electric field
(B) solar radiation
(C) thermal excitation
(D) kinetic energy of striking electrons

Q4. multimeter can be used to measure
(A) AC and DC voltage only
(B) AC and DC current only
(C) resistance value only
(D) all

Q5. Ionic wind voltmeter is used for measuring
(A) high voltage
(B) interwinding capacitance
(C) leakage inductance
(D) low voltage

Q6. the input impedance of an ideal voltmeter is....
(A) zero
(B) unity
(C) infinity
(D) none of these

Q7. sawtooth voltage in CRO is produced in
(A) sweep generator
(B) Hartley oscillator
(C) colpitts oscillator
(D) none of above

Q8. A dual beam CRO has which of the following?
(A) two vertical amplifiers
(B) two trigger circuit
(C) two horizontal amplifiers
(D) all

Q9. The CRO can directly measure
(A) average value of ac voltage
(B) peak value of ac voltage
(C) RMS value of ac voltage
(D) all

Q10. In a CRO the time base signal is a
(A) high frequency sinusoidal waveform
(B) high frequency sawtooth waveform
(C) rectangular waveform
(D) square waveform

Q11. the nature of calibration signal in a CRO is
(A) triangular
(B) square
(C) sinusoidal
(D) sawtooth

Q12. the phosphorus used on CRO screen are basically
(A) electrically changed particles
(B) insulator
(C) semiconductor
(D) conductor

Q13. ....... bridge is preferred for the measurements of inductance having high Q-factor
(A) de santy
(B) hay
(C) maxwell
(D) owen

Q14. In a CRT the magnitude of the beam current can be adjusted by a front panel control marked
(A) intensity
(B) time/div
(C) focus
(D) any of the above

Q15. The pointer of an indicating instrument is generally made of
(A) Copper
(B) Silver
(C) Aluminium
(D) Soft Steel

Q16. A dynamometer wattmeter can be used for
(A) both DC and AC
(B) DC only
(C) AC only
(D) None of these

Q17. The function of shunt in an ammeter is to
(A) by pass the current
(B) increase the sensitivity of the ammeter
(C) increase the resistance of ammeter
(D) none of the above

Q18. The internal resistance of an ammeter should be
(A) Very high
(B) Very small
(C) Medium
(D) Infinity

Q19. To avoid the effect of stray magnetic field in A.C. bridges uses
(A) magnetic screening
(B) Wagner earthing device
(C) wave filters
(D) Any of these

Q20. For measurement of mutual inductance we can use
(A) Anderson bridge
(B) Maxwells bridge
(C) Heaviside bridge
(D) Any of these

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