Chapter 12 Electricity – Page 5 – HI MCQ!

Read The Following Sentences Carefully, And Choose The Incorrect One?

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Nichrome alloy is used for making the heating elements of electrical appliances.
The heating elements of electrical heating appliances such as electric iron and toaster are made of an alloy rather than a pure metal.
Alloy of nickel, chromium, manganese and iron having a resistivity of about 60 times more than that of copper.
Nichrome undergoes oxidation very easily at a high temperature.

The resistivity of a wire depends on?

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The resistance of a wire of length 300 m and cross-section area 1.0 msq made of material of resistivity 1.0 × 10?7 ohm-m is:?

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An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

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When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is?

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What is the commercial unit of electrical energy?

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Four cells each of e.m.f E are joined in parallel to form a battery. The equivalent e.m.f of the battery will be?

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Two resistors are connected in series gives an equivalent resistance of 10 ohm. When connected in parallel, gives 2.4 ohm. Then the individual resistance are?

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Which of the following represents voltage?

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A Current of 1 a is drawn by a filament of an electric bulb. number of electrons passing through a cross section of the filament in 16 seconds would be roughly?

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