Question

an electric heater draws a current of 5A when connected from. source of 220V. what current will it draw when connected to a source of 60V
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Answer 1

Answer:

Hence, the electric heater with voltage 220 v and resistance of the heat coil 100 v will draw 2.2 A of current.

Answer 2

$\;\;\underline{\textbf{\textsf{ Given:-}}}$

• I₁= 5A

• V₁ = 220V

$\;\;\underline{\textbf{\textsf{ To Find :-}}}$

• R = ?

$\;\;\underline{\textbf{\textsf{ Solution :-}}}$

$\underline{\:\textsf{ Using Ohm's Law :}}$

$\sf V = IR \\\\ \sf \dashrightarrow R = \dfrac{V}{I} \\\\ \sf \dashrightarrow R = \dfrac{V_{1}}{I_{1}} \\\\ \sf \dashrightarrow R = \dfrac{220}{5} \\\\ \sf \dashrightarrow R = 44 \Omega$

Hence,

• The resistance of the heater is 44Ω.

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Again , we are asked to find the required current drawn by the heater.

Given that,

• The heater is connected with a source of 60V.

Then,

$\sf \dashrightarrow I_{2} = \dfrac{V_{2}}{R} \\\\ \sf \dashrightarrow I_{2} = \dfrac{60}{44} \\\\ \sf \dashrightarrow I_{2} = \dfrac{15}{11} \\\\ \sf \dashrightarrow I_{2} = 1.36 A$

$\;\;\underline{\textbf{\textsf{ Hence-}}}$

$\therefore \underline{ \textsf{The required current drawn by the heater is 1.36 A}}$

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