Electrical Engineering Quiz 5

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1. Two resistors are said to be connected in series when

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(a) same current passes in turn through both

(b) both carry the same value of current

(d) sum of IR drops equals the applied e.m.f.

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2. Which of the following statement is true both for a series and a parallel D.C. circuit?

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(a) Elements have individual currents

(b) Currents are additive

(d) Power are additive

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3. Which of the following materials has a negative temperature co-efficient of resistance?

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(a) Copper

(b) Aluminum

(d) Brass

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4. Ohm's law is not applicable to

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(a) vacuum tubes

(b) carbon resistors

(d) circuits with low current densities

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5. Which is the best conductor of electricity ?

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(a) Iron

(b) Silver

(d) Carbon

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6. For which of the following 'ampere second' could be the unit ?

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(a) Reluctance

(b) Charge

(d) Energy

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7. All of the following are equivalent to watt except

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(a) amperes square ohm

(b) joules/sec.

(d) amperes/volt

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8. A resistance having rating 10 ohms, 10W is likely to be a

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(a) metallic resistor

(b) carbon resistor

(d) variable resistor

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9. Which one of the following does not have negative temperature co-efficient ?

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(a) Aluminium

(b) Paper

(d) Mica

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10. Varistors are

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(a) insulators

(b) non-linear resistors

(d) resistors with zero temperature coefficient

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