When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will___________?
Correct answer: B. increase
- A. decrease
- B. increase
- C. remain constant
- D. none of the above
Explanation
Removing part of the heater wire reduces its length and therefore its resistance. With the supply voltage unchanged, P = V²/R, so the lower resistance causes the heater power to increase.
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