Question

- A small nichrome wire is connected to a 6 v
dissipated
is
wire.
battery for 10 minutes. If the energy
21600 J, find the resistance of nichrome​

Answer 1

Answer:

Energy (power×time) is measured in Joules and by including time (t) in the power formulae, the energy dissipated by a component or circuit can be calculated.

Energy dissipated = Pt or VI×tasP=VI.

It can also be written as I

2

×RtasV=IR.

Hence, the expression for Power in terms of current is given as P=I

2

RtJ.

It is given that resistance is 25 ohms and current is 2.0 A. The time taken is 1 minute, that is 1×60=60seconds.

Therefore, P=2

2

×25×60J=6000J.

Hence, the heat energy developed by the electrical appliance in 1 minute is 6000 J.

Explanation:

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