A chemical cell of internal resistance 1Ω supplies electric current to an external resistor of resistance 3Ω. Calculate the efficiency of the cell.
A. 75% B. 50% C. 33% D. 25% Correct Answer: Option A A. 75% Explanation R = r1+ R = 1+3 = 4Ω ¾×100 = 75%A ray of light is incident normally on a plan mirror. If the incident ray is kept fixed while the mirror is rotated through an angle of 30°, determine the initial and final angles of reflection respectively
A. 0° and 60° B. 90° and 30° C. 0° and 30° D. 90° and 60° Correct Answer: Option D D. 90° and 60°Which of the following optical instruments does not depend on the use of plane mirrors?
A. kaleidoscope B. simple microscope C. sextant D. simple periscope Correct Answer: Option B B. simple microscopeThe amplitude of a wave is the?
A. distance traveled by the wave in a complete cycle of its motion B. maximum displacement of the wave-particle from the equilibrium position C. separation of two adjacent particles vibrating in a phase D. distance between two successive troughs of the wave Correct...The distance between two points in phase on a progressive wave is 5cm. If the sped of the wave is 0.2ms-1, calculate its period.
A. 4.00s B. 2.50s C. 0.25s D. 0.04s Correct Answer: Option C C. 0.25sProducts
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Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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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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