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Common Questions Ask in Post UTME Physics Exams Day8
Physics
Chima Sunday (Tutor)
27-06-2016 13:36:00 +0000Try your best to solve these questions. Show working on paper when necessary and include a picture of your hand written Solution in your response. Wish you the best!
1. Two positive point charge of 12 micro Coulomb and 8 micro Coulomb respectively are 10cm apart. The work done in bringing them 4cm closer is
(K = 9 × 109Nm2C-2)
A. 600J
B. 300J
C. 6.8J
D. 518J
(LAUTECH)2. An electric heater is used to melt a block of ice, mass 1.5kg. If the heater is powered by a 12V battery, and a current of 20A flows through the coil, calculate the time take to melt the block of ice at 0oC. (specific latent heat of fusion of ice = 336 × 103J/kg)
A. 76.0min
B. 35.0min
C. 21.0min
D. 2.9min
(UNN)3. A body is projected from the earth surface with the hope of letting it escape from the earths gravitational field. What is the minimum escape velocity?[Earths radius = 6.4×103km; g = 10ms-2]
(OAU)
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