Images formed by a convex mirror are always?
A. magnified B. behind the mirror C. real D. inverted Correct Answer: Option B B. behind the mirrorAt which position should an object be placed in front of a concave mirror in order to obtain an image which is of the same size as the object?
A. at the centre of curvature B. at the principal focus C. between the pole and principal focus D. between the centre of curvature and principal focus Correct Answer: Option A A. at the centre of curvatureWhen salt is dissolved in water, the freezing point of the water?
A. increases B. decreases C. remains the same D. increases and later decrease Correct Answer: Option B B. decreasesAn electric heater has a resistance of 50Ω. When it is immersed in water and connected to the mains source, it draws a current of 4.0A. Calculate the heat gained by the water if the heater is switched on for 2 minutes, assuming no heat losses to the surroundings
A. 400J B. 1600J C. 24000J D. 96000J Correct Answer: Option D D. 96000J Explanation Q = I²RT = 4² x 50 x 2 x 60 = 96000JProducts
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Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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