Question

A heating appliance has a resistance a 115 resistance of 2 A current flows through it what is the power of the appliance?

Answer 1

Answer:

Given:

A heating Appliance has a Resistance of 115 ohm.

If 2 A Current flows through it .

Time = 10 Minutes ( Convert into Second - 10 × 60 = 600 Second)

To find:

The Heat Developed in the Appliance .

Formula used :

Heat=(current)^2×resistance ×Time

Solution:

Firstly, We know About Joule's Law of Heating :

This Law Define that When a Current (I) Passes through a Conductor of Resistance (R) For Time (t) then the heat produced in the Conductor is Equal  to the Product of the Square of the Current , Resistance and Time.

Now Solve this Question with the Help of this Law :

Therefore,

276,000 Joules of Heat Energy Developed in the Appliance.

Explanation:

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Answer 2

Power = Voltage * Current


Voltage = Current * Resistance


Power = Current * Resistance * Current


Power = 2 * 115 * 2


Power = 4 * 115


Power = 460 Watt.