Question

A bulb is rated 40 watt and the potential difference is 220v Find the current drawn by it when it is connected to 220v supply .​

Answer 1

Answer:

2/11 ampere is the required answer .

Explanation:

According to the Question

It is given that ,

• Power of bulb ,P = 40W
• Potential Difference ,V = 220v

we need to calculate the current drawn by the bulb .

As we know the relationship between Power, Current and Potential Difference .

• P = VI

where,

P denote Power

V denote potential difference

I denote Current

Substitute the value we get

➻ 40 = 220×I

➻ I = 40/220

➻ I = 4/22

➻ I = 2/11 A

• Hence, the current drawn by the bulb is 2/11 ampere.

Answer 2

QuesTion

• A bulb is rated 40 watt and the potential difference is 220v Find the current drawn by it when it is connected to 220v supply.

AnsweR

• Current drawn by the given bulb is 2/11 A.

Step By Step Explanation

Given that

• Power of bulb = 40 W
• Potential difference = 220v

To Find

• Current drawn by bulb?

Solution

• Here, we have power of bulb and potential difference, we have to find out current drawn by bulb. So, here we will use formula of power.

We know that,

$\pmb{\footnotesize{\boxed{\bf{Power = Potential\:difference\:\times\:Current}}}}$

❏ Putting all values in formula :

↦ $\sf 40 = 220 \:\times\:Current$

↦ $\sf \dfrac{4\cancel{0}}{22\cancel{0}} = Current$

↦ $\sf \dfrac{\cancel{4}}{\cancel{22}} = Current$

➦ $\pmb{\underline{\boxed{\bf{Current = \dfrac{2}{11}\:A}}}}$

∴ Hence, current drawn by it when it is connected to 220v supply is 2/11 A.

$\clubsuit$ Some important definitions :

• Current

Current is group of charged particles moving through electric conductor or electric circuit.

• Power

Rate of doing work is known as power.

• Potential difference

Potential difference between two points is the amount of work done in moving unit positive charge from one point to another point.

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬