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Answer :

Given, Potential difference (V) = 50V,

Charge (Q) = 96000 coulomb

Time, t = 1 hour = 60 X 60 s = 3600 s

Heat generated, H = VQ = 50Vx 96,000 C = 48,00,000 J = 4.8 x \(10^6\) J

- What does an electric circuit mean?
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- Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 \(\Omega \) resistor, an 8 \(\Omega \) resistor, and a 12\(\Omega \) resistor, and a plug key, all connected in series.
- Redraw the circuit of Question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 \(\Omega \) resistor. What would be the readings in the ammeter and the voltmeter?
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- What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series ?
- How can three resistors of resistances 2\(\Omega \), 3\(\Omega \) , and 6\(\Omega \) be connected to give a total resistance of (a) 4\(\Omega \), (b) 1\(\Omega \)?
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- Why does the cord of an electric heater not glow while the heating element does ?
- What determines the rate at which energy is delivered by a current ?
- An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

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