by Sunday | Nov 16 | Physics JAMB
A. 24 years B. 20 years C. 10 years D. 2 years Correct Answer: Option B – 20 years Explanation 1/64 is the usual fraction left of any radio active material after 4 half-lives, since 1/64 = (1/2)6 This implies that 6 half-lives have elapsed. Thus 6 half lives =...
by Sunday | Nov 16 | Physics JAMB
A. 80.0W B. 40.0W C. 10.0W D. 0.1W Correct Answer: Option A = 80.0W Explanation Power input = 3KW = 3000W Voltage = 1.5KV = 1500V Current (I) = P/V = 3000/1500 = 2Amps. ∴ Power loss in the cables = I²R = 2 x 2 x 20 =...
by Sunday | Nov 16 | Physics JAMB
A. reduced pressure and high current B. increased magnetic field C. reduced pressure and reduced potential D. exposure to visible light Correct Answer: Option A – reduced pressure and high current Explanation In general, gases conduct electricity under reduced...
by Sunday | Nov 16 | Physics JAMB
A. less than the number of holes in the valence band B. equal to the number of holes in the valence band C. greater than the number of holes in the valence band D. twice the number of holes in the valence band Correct Answer: Option B – equal to the number of...
by Sunday | Nov 16 | Physics JAMB
A. Compound microscope B. Galileo’s telescope C. Terrestrial telescope D. Astronomical telescope Correct Answer: Option D – Astronomical telescope
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