by Sunday | Nov 15 | Physics JAMB
A. 40Hz, 80Hz, 120Hz B. 80Hz, 160Hz, 240Hz C. 180Hz, 360Hz, 540Hz D. 369Hz, 180Hz, 90Hz Correct Answer: Option A – 40Hz, 80Hz, 120Hz Explanation In vibrations in string, the fundamental frequency happens to be the first harmonic, and is given as f0 = V/2l. Where...
by Sunday | Nov 15 | Physics JAMB
A. proportional to both the magnitude of the charge and the velocity v B. independent of the magnitude of the charge C. proportional to the velocity v only D. proportional to the magnitude of the charge only Correct Answer: Option A – proportional to both the...
by Sunday | Nov 15 | Physics JAMB
A. I/16 H B. I/8 H C. I/64 H D. I/32 H Correct Answer: Option D Explanation Resonant, frequency in an a.c. circuit is given by F = I/2π√LC therefore 200 * 103 = I/2 * π√l * 20 * 10-12 therefore (2.0 * 105)2 = I/4 * π2 * L * 20 * 10-12 THEREFORE L = I/4.0 * 1010 * 4 *...
by Sunday | Nov 15 | Physics JAMB
A. low resistance wires B. insulated soft iron wires C. few turns of wires D. high resistance wires Correct Answer: Option B – insulated soft iron wires
by Sunday | Nov 15 | Physics JAMB
A. switch and amplifier B. rectifier and an amplifier C. charge storer and an amplifier D. charge storer and a switch Correct Answer: Option A – switch and amplifier
by Sunday | Nov 15 | Physics JAMB
A. conductor makes an angle of 60° with the field B. force is independent of the angles between the fields and the conductor C. conductor is parallel with the field D. conductor is at a right angle with the field Correct Answer: Option D = conductor is at a right...
by Sunday | Nov 15 | Physics JAMB
A. 90° B. 60° C. 0° D. 180° Correct Answer: Option C – 60° Explanation At resonance in an a.c. circuit, during which the capacitive reactance Xc is equal to the inductive reactance Xl, the phase angle Ø =...
by Sunday | Nov 15 | Physics JAMB
A. nuclear fission B. nuclear fusion C. electron collision D. radioactive decay Correct Answer: Option B – nuclear fusion Explanation The process of energy production in the sun is generally by nuclear fusion of hydrogen nuclei, the reaction of which takes place...
by Sunday | Nov 15 | Physics JAMB
A. Iron B. Manganese C. Alminium D. Lead Correct Answer: Option D – Lead
by Sunday | Nov 15 | Physics JAMB
A. 120 B. 100 C. 1000 D. 1200 Correct Answer: Option B = 100 Explanation For the transformer, V ∝ ∩ => V s ∝ ∩s; Vp ∝ ∩p => Vp/Vs = ∩p/∩s, therefore 120/1200 = ∩p/1000 therefore ∩p * 1200 = 120 * 1000 ∩p = 120*1000/1200 =...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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