![A string of length 5cm is extended by 0.04m when a load of 0.8kg is suspended at the end. How far will it extend if a force of 16N is applied? [g = 10ms−2]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
by Sunday | Nov 4 | Physics JAMB
A. 0.04m B. 0.12m C. 0.01m D. 0.08m Correct Answer: Option D – 0.08m Explanation From Hoke’s Law, F = ke, K = Constant of Force For the first case, Force = mg, = 0.8 × 10 = 8N ∴ 8 = k × 0.04 k = 8/0.04 = 200Nm−¹ Since K is constant For the second case, F =...
by Sunday | Nov 4 | Physics JAMB
A. 0.1 m B. 0.2 m C. 2.0 m D. 2.5 m Correct Answer: Option B – 0.2 m Explanation Power of a lens = 1/f f = focal length f = 1/p = 1/5 = 0.2m
by Sunday | Nov 4 | Physics JAMB
A. Tension B. Weight C. Impulse D. Mass Correct Answer: Option D – Mass Explanation Scalar quantity is a quantity with only magnitude, it has no direction. Tension, weight, impulse are vector quantities because they have direction. Mass is the only scalar...
by Sunday | Nov 4 | Physics JAMB
A. 2.20 × 10³m B. 5.0 × 10²m C. 5.0 × 10^5m D. 11.8 × 1011¹¹m Correct Answer: Option B – 5.0 × 10²m Explanation V = f/λ λ = v/f = 3×10^8/600×10³ = 500m = 5 × 10²m N.B 600KHz Frequency = 600 ×...
by Sunday | Nov 4 | Physics JAMB
A. 100w B. 200w C. 400w D. 500w Correct Answer: Option D – 500w Explanation Power is the time rate of doing work i.e power = energy/time Since energy = mgH ∴ power = mgH/t = 50×10×5/t =...
by Sunday | Nov 4 | Physics JAMB
A. barometer B. thermometer C. hygrometer D. manometer Correct Answer: Option D – manometer Explanation Barometer is used to measure atmospheric pressure Thermometer is used to measure temperature Hygrometer is used to measure the relative density of a liquid...
by Sunday | Nov 4 | Physics JAMB
A. 80µF B. 6.0µF C. 4.0µF D. 2.0µF Correct Answer: Option D – 2.0µF Explanation For capacitance i n parallel, 2µF and 2µF are in parallel, their equivalence is 2µF and 2µF = 4µF The 4µF generated is now in series with the remaining 4µF. The net...
by Sunday | Nov 4 | Physics JAMB
A. number of turns in the coil is increased B. strength of the field magnet is increased C. slip rings are replaced with split ring commutator D. coil is wound on a soft iron armature Correct Answer: Option C – slip rings are replaced with split ring commutator...
by Sunday | Nov 4 | Physics JAMB
A. 240v B. 340v C. 480v D. 57600v Correct Answer: Option B – 340v Explanation The relationship between the peak value and r.m.s value of electricity supply is given as Vr.m.s = Vo/√2 where Vo = peak voltage ∴ Vo = Vr.m.s × √2 = 240 × √2 = 339.5v =...
by Sunday | Nov 4 | Physics JAMB
When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity pf P to Q is A. 1:4 B. 4:1 C. 1:1 D. 2:1 Correct Answer:...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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