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प्रश्न
How much energy is consumed when a current of 5 amperes flows through the filament (or element) of a heater having resistance of 100 ohms for two hours? Express it in joules.
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उत्तर
Given:
I = 5 A
R = 100 Î
Power consumed, P= I2R
= (5)2 100 watt
= 2500 watts=2.5 kW
Energy consumed, E = P x time
= 2.5 x 2
= 5 kWh
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संबंधित प्रश्न
What will be the change in the current if the potential difference is kept constant and the resistance of the circuit is made four times?
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- It will become one-fourth.
- It will become half.
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Ohm's law gives a relationship between:
(a) current and resistance
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(d) current and potential difference
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Coulomb
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State the limitations of Ohm’s law.
What is non-ohmic resistor?
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Choose the correct alternative.
Which of the following is an ohmic conductor?
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State macroscopic form of Ohm’s law.
What is ohmic device?
Explain the equivalent resistance of a series resistor network.
Explain the equivalent resistance of a parallel resistor network.
Let the resistance of an electrical device remain constant, while the potential difference across its two ends decreases to one fourth of its initial value. What change will occur in the current through it? State the law which helps us in solving the above stated question.
Which of the following is an example of a Non-Ohmic material?
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