Question

2A current flows through an electrical heating device of resistance 100 Ω.Calculate the time required to produce 50000 J heat energy


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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Given:-

Current (I) = 2A.

Resistance (R) = 100 Ω.

Heat energy (H) = 50000 J.

To Find:-

We need to find the time (t).

Solution:-

We have to use the heat energy formula, i.e.,

$H=I^{2} Rt$

Where t is time. Substitute the values in the equation.

⇒ $5000=2^{2} × t\\t= \frac{5000}{4*100} t= 125 seconds$

∴TIME TAKEN TO PRODUCE 50000 J OF HEAT ENERGY IS 125 SECONDS.

When current flows through a conductor, heat is produced. In other words, some electrical energy is converted into heat energy.

It is used in electric irons, bulbs, Electric heaters, Electric fuses.

Factors affecting heat energy:

⇒Resistance ∝ Heat energy.

⇒Time ∝ Heat energy

⇒Current ∝ Heat energy.

Sometimes this heat energy is undesirable because it converts useful electrical energy into heat.

Explanation: