An electric heater produces thermal energy at a rate of 1000 W when operated under the standard conditions.
What is the resistance of this heater?
Note: household outlets provide the potential difference of 120 V.

0.07 k ohms

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8.33 k ohms

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0.12 ohm

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8.33 ohm

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14.4 ohm

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Solution

The correct option is E 14.4 ohm
Given : $P = 1000$ W $V = 120$ volts
$∴$ Resistance of the heater $R = \frac{V^{2}}{P} = \frac{(120)^{2}}{1000} = 14.4$ ohms

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An electric heater produces thermal energy at a rate of 1000 W when operated under the standard conditions.What is the resistance of this heater?Note: household outlets provide the potential difference of 120 V.

The correct option is E 14.4 ohmGiven : P=1000 W V=120 volts∴ Resistance of the heater R=V2P=(120)21000=14.4 ohms

An electric heater produces thermal energy at a rate of 1000 W when operated under the standard conditions.
What is the resistance of this heater?
Note: household outlets provide the potential difference of 120 V.

The correct option is E 14.4 ohm
Given : $P = 1000$ W $V = 120$ volts
$∴$ Resistance of the heater $R = \frac{V^{2}}{P} = \frac{(120)^{2}}{1000} = 14.4$ ohms