1) At 2 MHz, the resonance is obtained with a resonating capacitance value of 12 pF and at 400 kHz, the resonance is obtained with resonating capacitance value of 320 pF. Then the self capacitance of the coil is
a. 0.62 pF
b. 0.83 pF
c. 1.2 pF
d. 1.5 pF
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Answer
Explanation
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ANSWER: 0.62 pF
Explanation:
No explanation is available for this question!
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2) In AC bridges, the Wagner earth devices are used to
a. Remove all the earth capacitances from the bridge circuit
b. Remove harmonics
c. Reduce error caused by stray electric field
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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3) Shielding of the capacitor is done to
a. Make the value of capacitor definite
b. Balance the bridge without any problem
c. Both (a) and (b)
d. None of these
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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4) If a capacitor is connected across a portion of resistance of multiplier of the wattmeter then the pressure coil of the circuit becomes
a. Inductive
b. Non inductive
c. Capacitive
d. Non capacitive
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Answer
Explanation
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ANSWER: Non inductive
Explanation:
No explanation is available for this question!
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5) For the measurement of unknown inductance in terms of known capacitance, the suitable ac bridges are
a. Maxwell and Schering bridge
b. Maxwell and Wien’s bridge
c. Maxwell and Hay’s bridge
d. Hay’s and Wien’s bridge
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Answer
Explanation
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ANSWER: Maxwell and Hay’s bridge
Explanation:
No explanation is available for this question!
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6) The Wien’s bridges is suitable for the measurement of frequency of the range of
a. Less than 100 Hz
b. 100 Hz to 100 kHz
c. 1 kHz to 100 MHz
d. More than 100 MHz
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Answer
Explanation
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ANSWER: 100 Hz to 100 kHz
Explanation:
No explanation is available for this question!
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7) The AC Bridge which is used for the measurement of frequency is
a. Schering bridge
b. Wien bridge
c. Hay’s bridge
d. Anderson bridge
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Answer
Explanation
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ANSWER: Wien bridge
Explanation:
No explanation is available for this question!
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8) Schering bridges are used for the measurement of
a. Unknown capacitance
b. Dielectric loss
c. Power factor
d. All of these
e. None of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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9) The bridge suitable for the measurement of capacitance is / are
a. Anderson’s bridge
b. Hay’s bridge
c. Owen’s bridge
d. None of these
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Answer
Explanation
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ANSWER: None of these
Explanation:
No explanation is available for this question!
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10) The Schering bridges can be used at
a. low voltage
b. high voltage
c. medium voltage
d. both (a) and (b)
e. all the above
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Answer
Explanation
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ANSWER: both (a) and (b)
Explanation:
No explanation is available for this question!
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