by Sunday | Nov 10 | Physics JAMB
A. 3.47 x 1018 B. 6.93 x 1020 C. 3.47 x 1020 D. 6.93 x 1018 Correct Answer: Option A – 3.47 x 1018 Explanation The number of disintegration,∆N in time interval At, is given by – ∆N = N∆t Where N is the number of atoms present at the time t But ^ =...
by Sunday | Nov 10 | Physics JAMB
A. 3.00 s B. 0.12 s C. 0.33 s D. 1.50 s Correct Answer: Option A = 3.00 s Explanation Half-life, T ½ = (0.693)/∆ = (0.693)/ 0.231 = 3.0sec
by Sunday | Nov 10 | Physics JAMB
A. ultraviolet rays B. alpha particles C. x – rays D. infrared rays Correct Answer: Option C = x-rays Explanation Canorous cells can be destroyed with a high penetrating radiation which is x – rays
by Sunday | Nov 10 | Physics JAMB
A. 5.60 v B. 24.00 v C. 0.24 v D. 2.40 v Correct Answer: Option D = 2.40 v Explanation Number of tunes, n = 500 Area, A = 0.2m + 0.2m = 0.4m² change of flux density A B = 1.0 – 0.4 = 0.6T Tune, t = 5 su Induced emf, ξ = (AB AN)/AT (0.6 x 0. 04 x 500)/5 =...
by Sunday | Nov 10 | Physics JAMB
A. 3.86 x 105J B. 3.56 x 105J C. 1.80 x 104J D. 2.16 x 105J Correct Answer: Option D = 2.16 x 105J Explanation Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000J = 2.16 x 105J
by Sunday | Nov 10 | Physics JAMB
A. close up B. become positively charged C. becomes negatively charged D. open further Correct Answer: Option A = close up Explanation The leaves collapse as the positive charges on the rod neutralizes the negative charges on the...
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