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Standard X
Physics
Practical applications of heating effect
Question

Assertion :In a circuit, surface of the bulb becomes warmer than the connecting wires when the same current flows through them. Reason: A thin and long wire has higher resistance than a thick and short wire.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  3. Assertion is correct but Reason is incorrect
  4. Assertion is incorrect but Reason is correct

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Assertion is incorrect but Reason is correct
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Solution
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The filament of the electric bulb is made of a very thin and coiled tungsten wire which offers a large resistance and heat is produced when a current passes through it. On the other hand, connecting wires are thicker than the filament of the bulb so, it has lower resistance. The higher the resistance, the greater is the heat produced.

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