Electrical Engineering Quiz 4

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1. Electric pressure is also called

5 points

a. resistance

b. power

c. voltage

d. energy

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2 The substances which have a large number of free electrons and offer a low resistance are called

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a. insulators

b. inductors

c. semi-conductors

d. conductors

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3. Out of the following which is not a poor conductor ?

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a. Cast iron

b. Copper

c. Carbon

d. Tungsten

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4. Out of the following which is an insulating material ?

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a. Copper

b. Gold

c. Silver

d. Paper

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5. The property of a conductor due to which it passes current is called

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a. resistance

b. reluctance

c. conductance

d. inductance

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6 . Conductance is reciprocal of

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(a) resistance

(b) inductance

(d) capacitance

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7. The resistance of a conductor varies inversely as

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(a) length

(b) area of cross-section

(d) resistivity

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8. With rise in temperature the resistance of pure metals

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(a) Increases

(b) decreases

(d) remains constant

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9. With rise in temperature the resistance of semi-conductors

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(a) decreases

(b) increases

(d) remains constant

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10. The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around

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(a) 1.2 x 10~8 Q-m

(b) 1.4 x 10~8 Q-m

(d) 1.8 x 10"8 Q-m

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