Current Electricity - ConceptEra

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Current Electricity

Q- Is Joule heating a reversible effect?

Chapter: Current Electricity

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Q- Name the factors on which the heat produced in a wire depends when current is passed in it, and state how does it depend on those factors.

Chapter: Current Electricity

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Q- Why is the metallic filament of an incandescent bulb placed in an evacuated glass bulb?

Chapter: Current Electricity

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Q- Why is an electric incandescent bulb filled with argon gas? State any disadvantage of the practice.

Chapter: Current Electricity

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Q- When current flows through a wire continuously, the wire is not heated continuously. Why?

Chapter: Current Electricity

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Q- What will happen if the mica strips in an electric iron develop holes in them?

Chapter: Current Electricity

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Q- Which material is used to prepare fuse wire?

Chapter: Current Electricity

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Q- Which metal is generally used to prepare filament of an incandescent bulb?

Chapter: Current Electricity

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Q- How does the heat produced in a conductor due to passage of current depend on the current strength?

Chapter: Current Electricity

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Q- I-V graph for parallel andseriescombination of two metallic resistors are shown in Fig. Which graph represents parallel combination? Justify.

Chapter: Current Electricity

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