Question

What is the power produced by an appliance marked “ 240 V, 2A” ?
A) 8.3MW
B) 60W
C) 120W
D) 480W

Answer 1

The power ($P$) produces by an appliance is given by $P = IV$.Where ($I$) is the current drawn and ($V$) is the voltage at which the appliance is operating, putting the values in the equation and solving we get our required result.
Formula used:- The power ($P$) produced by an appliance is given by $P = IV$.
Where ($I$) is the current drawn and ($V$) is the voltage at which the appliance is operating.

Complete step by step answer:
The energy liberated per second in a device is called its power. If the current enters the higher potential point of the device then power is consumed by it & if the current enters the lower potential point then the device supplies power.
The power ($P$) produced by an appliance is given by $P = IV$.
Where ($I$) is the current drawn and ($V$) is the voltage at which the appliance is operating.
Current drawn is $2A$, & Voltage at which appliance is operating is $240 V$.
Putting the values in $P = IV$, we get
$\Rightarrow P = 2 \times 240W$
On simplification, we get
$\Rightarrow P = 480W$

Since, the power produced by an appliance marked “ $240 V, 2A$” is $480 W$.

Hence option (D) is the correct answer.

Note:
If the device is consuming the power we call this device as Load & if the device is producing power then we call it as source.
When a current is passed through a resistor energy is wasted in overcoming the resistances of the wire, this energy is converted into heat.