by Sunday | Nov 9 | Physics JAMB
A. 500.0J B. 250.0J C. 62.5J D. 50.0J E. no correct option Correct Answer: Option E = no correct option Explanation Total inductance,L = L¹ + L² = m 15 + 5 = 20mH = (20)H/1000 1 = 5A Energy of inductor, ½LI² = (1)/2 X (20)/1000 X 5‾² = 0.25...
by Sunday | Nov 9 | Physics JAMB
A. 1Ω B. 2Ω C. 5Ω D. 10Ω Correct Answer: Option D = 10Ω Explanation R = (Vg)/lg = G, where lg = current through galvanometer R = resistance of the multiplier G = resistance of the galvanometer ∴ G = (vg-R)/lg 5(1000/10) – 490 = 500 -490 =...
by Sunday | Nov 9 | Physics JAMB
A. make pass through the transformers B. increase the power supply C. make it travel fast D. prevent overheating of the coil Correct Answer: Option D – prevent overheating of the coil Explanation Heat generated in a wire carrying current, H = 1²Rt. So, when the...
by Sunday | Nov 9 | Physics JAMB
A. be induced B. converge C. diverge D. remain constant Correct Answer: Option C – diverge Explanation Since the charged rod is not in contact with the electroscope, the leaves divergence will be induced
by Sunday | Nov 9 | Physics JAMB
A. different hidden colours in the glass B. different speeds of the colour in the glass C. defects in the glass D. high density of the glass Correct Answer: Option B – different speeds of the colour in the glass Explanation Dispersion is the splitting of white...
by Sunday | Nov 9 | Physics JAMB
A. convex lens B. concave lens C. convex mirror D. concave mirror Correct Answer: Option B – concave lens Explanation Concave lens diverges parallel rays of light. A short-sighted person has the image formed before the retina, and the rays have to be diverged so...
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