Electrical engineering Quiz 6

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1. Insulating materials have the function of

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(a) preventing a short circuit between conducting wires

(b) preventing an open circuit between the voltage source and the load

(d) storing very high currents

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2. The rating of a fuse wire is always expressed in

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(a) ampere-hours

(b) ampere-volts

(d) amperes

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3. The minimum charge on an ion is

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(a) equal to the atomic number of the atom

(b) equal to the charge of an electron

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4. In a series circuit with unequal resistances

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(a) the highest resistance has the most of the current through it

(b) the lowest resistance has the highest voltage drop

(d) the highest resistance has the highest voltage drop

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5. The filament of an electric bulb is made of

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(a) carbon

(b) aluminium

(d) nicke

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6. A 3 ohm resistor having 2 A current will dissipate the power of

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(a) 2 watts

(b) 4 watts

(d) 12 watts

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7. Which of the following statement is true?

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(a) A galvanometer with low resistance in parallel is a voltmeter

(b) A galvanometer with high resistance in parallel is a voltmeter

(d) A galvanometer with high resistance in series is an voltmeter

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8. The resistance of a few metres of wire conductor in closed electrical circuit is

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(a) practically zero

(b) low

(d) very high

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9. If a parallel circuit is opened in the main line, the current

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(a) increases in the branch of the lowest resistance

(b) increases in each branch

(d) is zero in the highest resistive branch

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10. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes

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(a) 0.4 ohm

(b) 0.6 ohm

(d) 1.0 ohm

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