(A) The resistance of the bulbs are given by $R_1 = \frac{V^2}{P_1}$ and $R_2 = \frac{V^2}{P_2}$.When connected in parallel,the total power $P_p$ cons

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(A) The resistance of the bulbs are given by $R_1 = \frac{V^2}{P_1}$ and $R_2 = \frac{V^2}{P_2}$.When connected in parallel,the total power $P_p$ consumed by the circuit is given by $P_p = \frac{V^2}{R_{eq}}$.For parallel connection,the equivalent resistance $R_{eq}$ is given by $\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2}$.Substituting the values,we get $\frac{P_p}{V^2} = \frac{P_1}{V^2} + \frac{P_2}{V^2}$.Therefore,$P_p = P_1 + P_2$.

Class 12 Physics Current Electricity Electrical Energy and Power

Easy

Two electric bulbs have ratings $P_1 \text{ watt}, V \text{ volt}$ and $P_2 \text{ watt}, V \text{ volt}$. If they are connected in parallel to a $V \text{ volt}$ supply,the total power consumed will be:

A
$P_1 + P_2 \text{ watt}$
B
$\sqrt{P_1 P_2} \text{ watt}$
C
$\frac{P_1 P_2}{P_1 + P_2} \text{ watt}$
D
$\frac{P_1 + P_2}{P_1 P_2} \text{ watt}$

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Class 12

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Current Electricity

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Electrical Energy and Power

In the figure shown,the power generated in $y$ is maximum when $y = 5\,\Omega$. Then $R$ is

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An electric heater of resistance $6 \, \Omega$ is run for $10 \, \text{minutes}$ on a $120 \, \text{V}$ line. The energy liberated in this period of time is:

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If a $2\, kW$ boiler is used everyday for $1$ hour, then the electrical energy consumed by the boiler in thirty days is .......... $units$.

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What amount of heat will be generated in a coil of resistance $R$ due to a charge $q$ passing through it if the current in the coil decreases to zero uniformly during a time interval $\Delta t$?

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Two electric bulbs have ratings $P_1 \text{ watt}, V \text{ volt}$ and $P_2 \text{ watt}, V \text{ volt}$. If they are connected in parallel to a $V \text{ volt}$ supply,the total power consumed will be:

Similar Questions

In the figure shown,the power generated in $y$ is maximum when $y = 5\,\Omega$. Then $R$ is

Power $P$ is to be delivered to a device via transmission cables having resistance $R_C$. If $V$ is the voltage across the device and $I$ is the current through it,find the power wasted and how can it be reduced.

An electric heater of resistance $6 \, \Omega$ is run for $10 \, \text{minutes}$ on a $120 \, \text{V}$ line. The energy liberated in this period of time is:

If a $2\, kW$ boiler is used everyday for $1$ hour, then the electrical energy consumed by the boiler in thirty days is .......... $units$.

What amount of heat will be generated in a coil of resistance $R$ due to a charge $q$ passing through it if the current in the coil decreases to zero uniformly during a time interval $\Delta t$?

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