by Sunday | Nov 11 | Physics JAMB
A. p- and n- types respectively B. n- en p- type respectively C. p- type semiconductor D. n- type semiconductors Correct Answer: Option A = p- and n- types respectively Explanation When silicon, a four valency element, is doped with aluminum, a three valency element,...
by Sunday | Nov 11 | Physics JAMB
A. covalent B. electrovalent C. ionic D. metallic Correct Answer: Option A = covalent
by Sunday | Nov 11 | Physics JAMB
A. 6.6 X 10-28 B. 1.99 X 10-27 C. 6.60 x 10-26 D. 1.99 x 10-25 Correct Answer: Option D = 1.99 x 10-25 Explanation E = HF = (hc)/λ Eλ = hc ∴ X = hc ==6.63 x 10-34 x 108 = 1.989 x 10-25 =1.99 x...
by Sunday | Nov 11 | Physics JAMB
A. 864 NC‾¹ B. 150 NC‾¹ C. 144 NC‾¹ D. 18 NC‾¹ Correct Answer: Option A Explanation In general, electric field strength E = (F)/q E = q/4πε0d² ⇒ 360 = 9×109×50×10-6/d² solving, we have d² = 1250 putting d² = 1250 into the second equation, E = 9×109×120×10-6 /1250 we...
by Sunday | Nov 11 | Physics JAMB
A. glass prism with a pin B. triangular prism with two convex lens C. triangular prism only D. triangular prism with two concave lenses Correct Answer: Option B = triangular prism with two convex lens
by Sunday | Nov 11 | Physics JAMB
A. Simple microscope B. refecting lens C. compound microscope D. projector Correct Answer: Option A – Simple microscope
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