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Questions and Answers
What part of a heating equipment converts electric energy into heat energy?
What part of a heating equipment converts electric energy into heat energy?
Which substance is commonly used to make the heating coil of a heating appliance?
Which substance is commonly used to make the heating coil of a heating appliance?
What does the marking '100 W' on an incandescent lamp indicate?
What does the marking '100 W' on an incandescent lamp indicate?
What is the highest resistance that can be obtained using resistances of 4 Ω, 6 Ω, and 12 Ω?
What is the highest resistance that can be obtained using resistances of 4 Ω, 6 Ω, and 12 Ω?
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What is the lowest resistance that can be obtained using resistances of 6 Ω and 12 Ω?
What is the lowest resistance that can be obtained using resistances of 6 Ω and 12 Ω?
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What quantity of charge flows through the circuit in 5 minutes if a 2A current flows through an electric heating device connected to a 230V supply?
What quantity of charge flows through the circuit in 5 minutes if a 2A current flows through an electric heating device connected to a 230V supply?
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What is the purpose of using hydrogen or nitrogen at low pressure in incandescent lamps?
What is the purpose of using hydrogen or nitrogen at low pressure in incandescent lamps?
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If the intensity of electric current in a circuit is doubled, what happens to the heat energy developed in this circuit?
If the intensity of electric current in a circuit is doubled, what happens to the heat energy developed in this circuit?
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Which of the following light sources does not contain mercury?
Which of the following light sources does not contain mercury?
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What are two characteristic properties of the material used as a heating coil in heating devices?
What are two characteristic properties of the material used as a heating coil in heating devices?
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How is light energy produced in discharge lamps?
How is light energy produced in discharge lamps?
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(a) What material is used as the filament in incandescent lamps? (b) What are the characteristic properties of this material? (c) Why are these lamps filled with nitrogen?
(a) What material is used as the filament in incandescent lamps? (b) What are the characteristic properties of this material? (c) Why are these lamps filled with nitrogen?
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Why does a heater with a low resistant heating coil get heated more?
Why does a heater with a low resistant heating coil get heated more?
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