Current Electricity | Practice MCQs Physics for Mdcat | mosaicbro.com

Current Electricity | Practice MCQs Physics for Mdcat

7 of 85 questions (Page 9 of 13)

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57 Power dissipated in the form of ‘V’ and ‘R’ can be determined as:
Correct Answer: B
Explanation: Power can be expressed as $P = \frac{V^2}{R}$.
58 Unit of power, Joule/second is called:
Correct Answer: C
Explanation: Watt (W) is the unit of power ($1W = 1J/s$).
59 If one ampere current flows through a resistor against potential difference of one volt, this is called:
Correct Answer: B
Explanation: Power = Voltage × Current = $1V × 1A = 1W$.
60 Watt is equal to:
Correct Answer: C
Explanation: $1W = 1J/s$.
61 The practical unit of power is:
Correct Answer: B
Explanation: Kilowatt (kW) is commonly used for practical power measurements.
62 One kilowatt is equal to:
Correct Answer: A
Explanation: $1kW = 1000W = 10^3W$ (Note: The provided key may have an error; $10^5$ is incorrect. Correct answer is $10^3W$.)
63 Heat energy dissipated in resistors is defined as:
Correct Answer: C
Explanation: Heat energy can be expressed as $Vit$ or $I^2Rt$ (since $V = IR$).
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