Question

A bulb of resistance 400 ohms is connected to 200v mains calculate magnitude of current

Answer 1

Answer:

0.5 Amp

Explanation:

According to the given question,

R = resistance = 400 ohm

V = Voltage = 200 V

I = Current

And we are asked to find the magnitude of electric current.

From ohm's law,

• V = IR

Putting the values we get,

• 200 = I × 400

• I = 200/400

• I = 2/4

• I = 1/2

• I = 0.5 amp

Thus magnitude of electric current passing through the bulb is 0.5 amp.

Answer 2

R=400 ohms

V=200 V

as we know that

V=IR

I=V/R

=200/400

=0.5 A

hope this helps.