Question

A metal wire of resistance 5 ohm was connected to a battery of 10 volt. Then the current through the wire and the power spent on the wire are?

Answer 1

Answer:

R = 5 ohm

potential diffrence: 10v

I =?

p=?

I =v/R

I = 10/5 = 2 ampere

P =vI

P =10 × 2 = 20 watts

Answer 2

Answer:

Current through the wire = 2 Ampere

Power spent on the wire = 20 Watts

Explanation:

As per the question,

Given data:

Resistance = R = 5 ohm

Voltage = 10 volt

As we know that according to Ohm's law: Voltage is directly proportional to current,that is

V = IR

Now using this formula,

10 = I × 5

⇒ I = 2 Ampere

∴ Current through the wire = 2 Ampere

Also,

Power = Voltage × current = V × I

⇒Power = 10 volt × 2 ampere

⇒Power = 20 Watt

∴ Power spent on the wire = 20 Watts