by Sunday | Nov 15 | Physics JAMB
A. 45° B. 0° C. 90° D. 180° Correct Answer: Option B = 0° Explanation The angle of dip is the angle which the resultant earth’s magnetic field makes with the horizontal. At the magnetic equator, which is entirely along the horizontal this angle is...
by Sunday | Nov 15 | Physics JAMB
A. 5.76 x 104J B. 1.60 x 104J C. 3.60 x 103J D. 1.60 x 102J Correct Answer: Option A – 5.76 x 104J Explanation Electrical Energy = IVt = 4 x 240 x (1 x 60) = 57600J = 5.76 x 104J
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
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