(C) The resistance of an appliance is given by $R = \frac{V^2}{P}$.For the heater,the resistance is $R_h = \frac{(220)^2}{500} = \frac{48400}{500} = 9

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(C) The resistance of an appliance is given by $R = \frac{V^2}{P}$.For the heater,the resistance is $R_h = \frac{(220)^2}{500} = \frac{48400}{500} = 96.8\,\Omega$.For the bulb,the resistance is $R_b = \frac{(220)^2}{100} = \frac{48400}{100} = 484\,\Omega$.When connected in series,the total resistance of the circuit is $R_{eq} = R_h + R_b = 96.8 + 484 = 580.8\,\Omega$.The current in the series circuit is $I = \frac{V}{R_{eq}} = \frac{220}{580.8} \approx 0.3787\,A$,which rounds to $0.38\,A$.

Class 12 Physics Current Electricity Equivalent Resistance - Series and Parallel , Circuit

Medium

An electric heater and an electric bulb are rated $500\, W, 220\, V$ and $100\, W, 220\, V$ respectively. Both are connected in series to a $220\, V$ $a.c.$ mains. The current in the circuit when both are connected in series is ................ $A$.

A
$0.98$
B
$0.89$
C
$0.38$
D
$0.22$

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Equivalent Resistance - Series and Parallel , Circuit

Eight copper wires of length $l$ and diameter $d$ are joined in parallel to form a single composite conductor of resistance $R$. If a single copper wire of length $2\,l$ has the same resistance $R$,then its diameter will be $.....d$.

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$A$ wire is broken into four equal parts. $A$ packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the original wire will be:

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Find the equivalent resistance between points $A$ and $B$.

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Three identical resistances $A$,$B$,and $C$ are connected as shown in the given figure. The heat produced will be maximum in:

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The equivalent resistance of three unequal resistors connected in parallel is $1 \ \Omega$. If the ratio of two of them is $1:2$ and all resistance values are integers,what is the value of the largest resistor in ohms?

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An electric heater and an electric bulb are rated $500\, W, 220\, V$ and $100\, W, 220\, V$ respectively. Both are connected in series to a $220\, V$ $a.c.$ mains. The current in the circuit when both are connected in series is ................ $A$.

Similar Questions

Eight copper wires of length $l$ and diameter $d$ are joined in parallel to form a single composite conductor of resistance $R$. If a single copper wire of length $2\,l$ has the same resistance $R$,then its diameter will be $.....d$.

$A$ wire is broken into four equal parts. $A$ packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the original wire will be:

Find the equivalent resistance between points $A$ and $B$.

Three identical resistances $A$,$B$,and $C$ are connected as shown in the given figure. The heat produced will be maximum in:

The equivalent resistance of three unequal resistors connected in parallel is $1 \ \Omega$. If the ratio of two of them is $1:2$ and all resistance values are integers,what is the value of the largest resistor in ohms?

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