Calculate the current flowing through 1.5 kW-250 V electric heater and also find its resistance. [3 MARKS]

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Solution

Each point: 1.5 Mark

1. Given:
Power P= 1.5 kW= 1500W
Voltage V= 250 V

We know $P = V \times I$ , By substituting
$1500 = 250 \times I, I = \frac{1500}{250}$
Therefore I = 6A
2.
We know $V = I \times R$
Given:
Voltage V= 250 V
I = 6A from previous answer
By substituting, R= $\frac{V}{I}$ = $\frac{250}{6}$
Therefore Resistance R = 41.67 $Ω$

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Calculate the current flowing through 1.5 kW-250 V electric heater and also find its resistance. [3 MARKS]

Each point: 1.5 Mark 1. Given: Power P= 1.5 kW= 1500W Voltage V= 250 V We know P=V×I , By substituting 1500=250×I,I=1500250 Therefore I = 6A 2. We know V=I×R Given: Voltage V= 250 V I = 6A from previous answer By substituting, R=VI = 2506 Therefore Resistance R = 41.67 Ω