Electric motor primarily converts?
A. electrical energy into chemical energy B. electrical energy into heat energy C. kinetic energy into potential energy D. electrical energy into mechanical energy E. mechanical energy into light energy Correct Answer: Option D – electrical energy into...
Which of the following is not a conductor of electricity?
A. Human body B. Glass C. Silver D. Earth E. Copper Correct Answer: Option B – Glass
In the diagram below, three identical lamps each of 100 W are connected in parallel across a potential difference of 250 V. Calculate the reading of the ammeter.
A. 7.5A B. 2.5A C. 1.2A D. 0.8A E. O.4A Correct Answer: Option C – 1.2A Explanation P = VI ; I = P/V = 100/250 = 0.4A each Total current 3 x 0.4 = 1.2A
Electrical resistance is the property of an electrical conductor that causes electrical energy to be converted into?
A. mechanical energy B. solar energy C. heat energy D. magnetic energy E. chemical energy. Correct Answer: Option C – heat energy
The function of the magnanese (IV) oxide in a leclanche cell is to?
A. decrease the e.m.f. of the cell B. prevent local action in the cell C. prevent polarization in the cell D. increase the density of the electrolyte E. increase the resistance of the cell. Correct Answer: Option C – prevent polarization in the...Products
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