Calculation Of Electrical Energy! Trivia Questions Quiz

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| By MOHAMAD ZAMRI
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MOHAMAD ZAMRI
Community Contributor
Quizzes Created: 11 | Total Attempts: 15,543
| Attempts: 333
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  • 1/5 Questions

    What is electrical energy converted as heat by a 240 V light bulb that is switched on for 300 seconds? A current of 5A is moving through the bulb.

    • 360000 J
    • 72000 J
    • 1500 J
    • 14400 J
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About This Quiz

Dive into the fundamentals of electrical energy with this trivia quiz! Explore calculations involving voltage, power, and charge through practical scenarios. Perfect for learners aiming to understand energy dissipation and power calculations in electrical circuits.

Calculation Of Electrical Energy! Trivia Questions Quiz - Quiz

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  • 2. 

    What is the e.m.f of a cell if it uses 4.2 joules of energy as it pushes 6 coulombs of charge around a circuit?

    • 0.7 V

    • 25.2 V

    • 1.43 V

    • 4.8 V

    Correct Answer
    A. 0.7 V
    Explanation
    The electromotive force (e.m.f) of a cell is a measure of the energy provided by the cell to each unit of charge that passes through it. In this question, the cell uses 4.2 joules of energy to push 6 coulombs of charge around the circuit. To find the e.m.f, we divide the energy (4.2 J) by the charge (6 C), which gives us 0.7 V. Therefore, the correct answer is 0.7 V.

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  • 3. 

    The e.m.f of a cell is 1.5V. What energy is dissipated by the cell if it drives 0.4C of charge round the circuit?

    • 0.6 J

    • 0.6 W

    • 3.75 J

    • 3.75 W

    Correct Answer
    A. 0.6 J
    Explanation
    The energy dissipated by the cell can be calculated using the formula E = QV, where E is the energy, Q is the charge, and V is the voltage. In this case, the charge is 0.4C and the voltage is 1.5V. Plugging these values into the formula, we get E = 0.4C * 1.5V = 0.6 J. Therefore, the correct answer is 0.6 J.

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  • 4. 

    How much charge flows through an appliance rated 240V, 60W when it is used for 5 mins?

    • 75.0 C

    • 0.25 C

    • 40.0 C

    • 1.25 C

    Correct Answer
    A. 75.0 C
    Explanation
    The correct answer is 75.0 C. Charge is calculated by multiplying the current (I) by the time (t). In this case, the power (P) is given as 60W, and since P = IV, we can calculate the current as I = P/V. Plugging in the values, I = 60W/240V = 0.25A. Given that the time is 5 minutes (or 300 seconds), we can calculate the charge as Q = It = 0.25A * 300s = 75.0 C.

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  • 5. 

    What is the power of a light bulb if a 240 V light bulb is switched on for 2 minutes? A current of 3 A is moving through the bulb.

    • 720 Watts

    • 1440 Watts

    • 86400 Watts

    • 840 Watts

    Correct Answer
    A. 720 Watts
    Explanation
    The power of a light bulb can be calculated using the formula P = VI, where P is power, V is voltage, and I is current. In this case, the voltage is given as 240 V and the current is given as 3 A. By substituting these values into the formula, we get P = 240 V * 3 A = 720 Watts. Therefore, the power of the light bulb is 720 Watts.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 10, 2015
    Quiz Created by
    MOHAMAD ZAMRI
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