by Sunday | Nov 14 | Physics JAMB
A. 15N B. 20N C. 30N D. 60N Correct Answer: Option B – 20N Explanation Since the lever is a uniform one, its center of gravity will be acting half way (i.e 45cm) ∴from the principle of moments, F x 45 = 30 x 30 ∴ F = (30 x 30) / 45 =...
by Sunday | Nov 14 | Physics JAMB
A. perpendicular to the circular path B. parallel to the circular path C. tangential to the circular path D. towards the center of the circle Correct Answer: Option C – tangential to the circular path Explanation AS the stone is whirled round and te string...
by Sunday | Nov 14 | Physics JAMB
A. 2.45 x 108 Nm-2 B. 3.45 x 108 Nm-2 C. 4.90 x 108 Nm-2 D. 2.42 x 108 Nm-2 Correct Answer: Option A = 2.45 x 108 Nm-2 Explanation Pressure P = F/A = F/πr2 = 7.7 x 10-2 π x (10-5)2 = 7.7 x 10-2 π x 10-10 = 2.45 x...
by Sunday | Nov 14 | Physics JAMB
A. capilarity B. osmotic pressure C. viscosity D. surface tension Correct Answer: Option D – surface tension Explanation Surface tension – The tendency of a liquid surface to behave as an elastic skin
by Sunday | Nov 14 | Physics JAMB
A. 250N B. 200N C. 100N D. 50N Correct Answer: Option A – 250N Explanation Original length = 20m first new length = 20.01m First increase in length = 20.01m – 20m = 0.01m Second new length = 20.05m Second increase in length = 20.05 – 20m = 0.05m From...
by Sunday | Nov 14 | Physics JAMB
A. 1.250V B. 2.000V C. 8.000V D. 0.125V Correct Answer: Option B = 2.000V Explanation E = V + v where E = emf of cell. V = terminal p.d v = loss voltage of the cell. But from ohm’s law V=IR ; v = Iv ⟹ lost voltage = V = Ir = 4 x 0.5 =...
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