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A lamp is rated 240V, 60W. Determine the resistance of the lamp when lit?

by Sunday | Jan 9 | Physics WAEC

A. 120Ω B. 240Ω C. 540Ω D. 960Ω Correct Answer: Option D = 960Ω
One major reason why electrical appliances in homes are normally earthed is that the?

One major reason why electrical appliances in homes are normally earthed is that the?

by Sunday | Jan 9 | Physics WAEC

A. person touching the appliance is safe from electric shock B. appliances are maintained at a higher p.d. than the earth C. appliances are maintained at a lower p.d. than the earth D. appliances are maintained at the same p.d. with that of the earth Correct Answer:...

Three cells each of emf, 1.0 V, and internal resistance, 2 Ω, are connected in parallel across a 3Ω resistor. Determine the current in the resistor.

by Sunday | Jan 9 | Physics WAEC

A. 0.90A B. 0.39A C. 0.30A D. 0.01A Correct Answer: Option C = 0.30A
One major reason why electrical appliances in homes are normally earthed is that the?

In a series R-L-C circuit at resonance; impedance is?

by Sunday | Jan 9 | Physics WAEC

A. maximum B. minimum C. capacitive D. inductive Correct Answer: Option A – maximum Explanation Since the current flowing through a parallel resonance circuit is the product of voltage divided by impedance, at resonance the impedance, Z is at its maximum value....
One major reason why electrical appliances in homes are normally earthed is that the?

An inductor of inductance 10 H is connected across an a.c circuit source of 50 V, 100 Hz. What is the current in the circuit? [π = 3.14]

by Sunday | Jan 9 | Physics WAEC

A. 0.200A B. 0.070A C. 0.050A D. 0.008A Correct Answer: Option D = 0.008A
One major reason why electrical appliances in homes are normally earthed is that the?

The speed of fast-moving neutrons in a nuclear reactor can be reduced by using?

by Sunday | Jan 9 | Physics WAEC

A. graphite rods B. concrete shield C. iron rods D. boron rods Correct Answer: Option A – graphite rods Explanation Moderation is the process of the reduction of the initial high speed (high kinetic energy) of the free neutron. Since energy is conserved, this...
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