A lamp marked 100W, 250V is lit for 10 hours. If it operates normally and 1KWh of electrical energy costs 2k, what is the cost of lighting the lamp?
A. 1k B. 2k C. 5k D. 10k E. 20k Correct Answer: Option B – 2k Explanation 100W X 10h = 1000Wh = 1KWh thus cost is 2k
A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field of strength B in the direction of the field. The force on the particle is?
A. qvB B. mqvB C. qvB/m D. mvB/q Correct Answer: Option A – qvB
The electrical energy supplied by a Leclanche cell is obtained from the?
A. Nuclear energy B. Magnetic energy C. Solar energy D. Chemical energy E. Mechanical energy Correct Answer: Option D – Chemical energy
Which of the following has the shortest wavelength?
A. Infrared rays B. Gamma rays C. Ultraviolet rays D. Radio waves E. Visible light Correct Answer: Option B – Gamma rays
Which of the following are transverse waves?
I. Ripples on water II. Sound waves in air III. Light waves from the sun A. II only B. I and II only C. II and III only D. I and II only E. I, II and III Correct Answer: Option D – I and II onlyProducts
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Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.
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Co-Ownership Structures and Land Acquisition Methods in Nigeria
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Rights in Community Land and Fundamental Land Concepts in Nigeria
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Customary Land Control and the Origins of Nigeria's Land Use Act
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Land Ownership Principles and Transaction Laws in Nigeria
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