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The current I flowing through an electric circuit of resistance 10 ohm is 5 amp. What is the heat generated per second?
Question

The current I flowing through an electric circuit of resistance 10 ohm is 5 amp. What is the heat generated per second?

A.

250 calorie

B.

250 joule

C.

50 joule

D.

50 calorie

Correct option is B

The correct answer is (b) 250 joule.

Explanation:

The heat generated per second in an electric circuit due to current flowing through a resistance is given by Joule's Law. The formula for the heat generated is:

H= I2 Rt 

Where:

  • H is the heat generated (in joules),
  • I is the current in amperes,
  • R is the resistance in ohms,
  • t is the time in seconds.

Substituting the given values into the formula:

H= (5)2x 10 = 250 Joules

Thus, the heat generated per second is 250 joules.

Information Booster:

  • Joule's Law: The heat generated in a resistor is directly proportional to the square of the current and the resistance. This is why increasing either the current or the resistance results in more heat being produced.

Units:

  1. Joule is the SI unit of energy and is used to measure heat energy.
  2. In some cases, you might encounter heat energy being measured in calories. The conversion between joules and calories is:1calorie=4.18 Joules
  3. Therefore, 250 Joules is equivalent to approximately 59.8calories but since the answer options are in joules, the correct answer is 250 joules.250joules250 \, \text{joules}


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