Question

how much current will an electric bulb draw from 220V source if the resistance of the bulb is 1200 ohm ? if in place of bulb a heater of resistance 100 ohm is connected to the source calculate the current drown by it

Answer 1

I hope this is the answer

Answer 2

Answer:

• Current drawn by the bulb = 0.183 Amperes.

• Curent drawn by the heater = 2.20 Amperes.

Explanation:

According to Ohm's law, the current I flowing through an electrical element is directly proportional to the potential difference V applied across it.

$\rm I \propto V\\I=\kappa V\\V=\dfrac{1}{\kappa}\ I\\V=RI.\\\\where, \ R = \dfrac{1}{\kappa}.$

R is called resistance of the element.

For the electric bulb:

• V = 220 V.

• R = 1200 $\Omega.$

Using Ohm's law,

$\rm I = \dfrac VR = \dfrac{220}{1200}=0.183\ A.$

For the heater:

• R = 100 $\Omega.$

• V = 220 V.

Using Ohm's law,

$\rm I = \dfrac VR = \dfrac{220}{100}=2.20\ A.$