When a brick is taken from the earth’s surface to the moon; its mass?
A. remains constant B. reduces C. increases D. becomes zero Correct Answer: Option A – remains constant
When 210//82Pb decays to 206//80Pb; it emits?
A. two alpha and two beta particles B. an alpha particle C. one beta particle D. one alpha and one beta particle Correct Answer: Option B – an alpha particle
In a common emitter configuration; the output voltage is through the?
A. Resistor B. Base C. Collector D. Emitter Correct Answer: Option D – Emitter
Which gas produces a pink coloured light in a discharge tube?
A. Mercury B. Argon C. Air D. Neon Correct Answer: Option C – Air
Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3×10^7kgC−¹]
A. 2.9×10^5kg B. 9.5×10^-7kg C. 9.5×10^-3kg D. 2.9×10^4kg Correct Answer: Option C – 9.5×10^-3kg Explanation Mass = ZIT kg Mass = 3.3 x 10^-7 x 4 x 2 x 60 x 60 kg Mass = 9.5 x...Products
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