by Sunday | Nov 10 | Physics JAMB
A. β – rays are produced B. holes are produced C. x – rays are produced D. electrons leave a hot element Correct Answer: Option D – electrons leave a hot element Explanation Thermionic emission is ejection of an electron from a metal surface as a...
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 =...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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