Question

The resistance of the element of an electric heater is 44 W. How much current should be used by this heater when a potential difference is 220 V?

Answer 1

Correct Question !!

The resistance of the element of an electric heater is 44 ohm. How much current should be used by this heater when a potential difference is 220 V?

Solution :

According to the Question

It is given that ,

• Resistance of electric heater ,R = 44ohm
• Potential Difference ,V = 220v

we need to calculate the current used by electric heater .

So, we use here the ohm's law .

• V = IR

where,

V denote Potential Difference

I denote Current

R denote Resistance

Substitute the value we get

➺ 220 = I × 44

➺ I × 44 = 220

➺ I = 220/44

➺ I = 5 A

• Hence, the current used by this heater is 5 ampere.

Answer 2

Answer:

Question is slightly wrong.Resistance should be 44ohms

• Resistance=R=44ohms
• Potential difference=V=220V
• Current=I=?

Using ohms law

$\boxed{\sf \dfrac{V}{I}=R}$

$\\ \sf\longmapsto I=\dfrac{V}{R}$

$\\ \sf\longmapsto I=\dfrac{220}{44}$

$\\ \sf\longmapsto I=5A$