Question 3 a) A coil consist of 2000 turns of copper wire having a cross sectional...

Question 3
a) A coil consist of 2000 turns of copper wire having a cross sectional area of 0.8mm2. The mean length per turn is 80 cm and the resistivity of copper is 0.02μΩ-m. Find the resistance of the coil and power absorbed by the coil when connected across 110V D.C supply. AN [8marks]
b) A circuit consist of four 100W lamps connected in parallel across a 230V supply. Inadvertently, a voltmeter has been connected in series with the lamps. The resistance of the voltmeter is 1500Ω and that of the lamps under the conditions stated is six times their value when burning normally. What will be the reading of the voltmeter?
CR[8marks]
c) Explain why a capacitor has a high reactance for a direct current. EV[4marks]

Expert Solution

Simply apply the ohms law and applied the power formula.

Manojponduru answered 3 hours ago

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