1) Moving iron power factor meter are suitable for 3 phase balanced circuits. It consists of
a. One control spring
b. Two control spring
c. Three control spring
d. No control spring
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Answer
Explanation
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ANSWER: No control spring
Explanation:
No explanation is available for this question!
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2) If the frequency of electrodynamic power factor meter is doubled then its reading will become
a. Twice of the original reading
b. Half of the original reading
c. Four times of the original reading
d. Remains unaffected
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Answer
Explanation
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ANSWER: Remains unaffected
Explanation:
No explanation is available for this question!
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3) A moving iron frequency meter consists of
a. Two inductive circuits connected in parallel
b. One inductive and one non inductive circuit connected in parallel
c. Two non inductive circuits connected in parallel
d. One inductive and one non inductive circuit connected in series
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Answer
Explanation
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ANSWER: One inductive and one non inductive circuit connected in parallel
Explanation:
No explanation is available for this question!
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4) The electrodynamic frequency meters have
a. Linear scale and their readings does not depends on voltage
b. Linear scale and their readings depends on voltage
c. Non linear scale and their readings does not depends on voltage
d. Non linear scale and their readings depends on voltage
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Answer
Explanation
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ANSWER: Linear scale and their readings does not depends on voltage
Explanation:
No explanation is available for this question!
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5) The meter of a vibrating reed frequency meter depends for its indications on the
a. Electrical resonance of thin flat steel reeds
b. Mechanical resonance of thin flat steel reeds
c. Mechanical resonance of thick flat steel reeds
d. Electrical resonance of thick flat steel reeds
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Answer
Explanation
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ANSWER: Mechanical resonance of thin flat steel reeds
Explanation:
No explanation is available for this question!
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6) Vibration galvanometer are generally used
a. For measuring electric charges
b. As null - point detectors in ac bridges
c. As null - point detectors in dc bridges
d. For measuring power
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Answer
Explanation
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ANSWER: As null - point detectors in ac bridges
Explanation:
No explanation is available for this question!
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7) Ballistic galvanometer are principally used for the measurement of
a. Current
b. Voltage
c. Power
d. Electric charges
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Answer
Explanation
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ANSWER: Electric charges
Explanation:
No explanation is available for this question!
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