Questions
A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is
detailed solution
Correct option is A
P= V2R ⇒ P ∝ 1R and R ∝ l∴ P ∝ 1l ⇒ P1P2 = l2l1 = 21Talk to our academic expert!
Similar Questions
A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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