If the current flowing through an electric heater increases from 6 to 12 amp while the voltage remains the same, the heat produced by the heater will be
a. reduced one-half.
c. two times the original heat.
b. unchanged.
d. four times the original heat.

Explanation:

It is given that,

Current,

Heat produced, ............(1)      

Where

R is the resistance

t is the time taken

So,

Current,

Heat produced,      

So, .............(2)

From equation (1) and (2), it is clear that

So, If the current flowing through an electric heater increases from 6 to 12 amp while the voltage remains the same, the heat produced by the heater will be four times the original heat.

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a, c, d, e are all applying about success strategies.