First slide

Electrical power

Question

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

Easy

A

doubled
B

four times
C

one-fourth
D

halved

Solution

$\frac{V^{2}}{R} = H a s R d e c r e a s e s b y t w o t i m e s H i n c r e a s e s b y t w o t i m e s$

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