by Sunday | Nov 15 | Physics JAMB
A. π/800 Hz B. 800/π Hz C. 200π Hz D. 2000π Hz Correct Answer: Option B – 800/π Hz Explanation Capacitive Reactance = 1 2π + C => 250 = 1 2 x π x f x 2.5 x 106 ∴ 250/1 = 106/5.0xf => F = 106 250 x 5.0 x π = 106 1250π...
by Sunday | Nov 15 | Physics JAMB
A. inductance B. resistance C. capacitance D. voltage Correct Answer: Option B – resistance
by Sunday | Nov 15 | Physics JAMB
A. controls the flow of current B. consumes a lot of power C. allows doping D. contains electron and hole carriers Correct Answer: Option A – controls the flow of current
by Sunday | Nov 15 | Physics JAMB
A. neutron B. prton C. electron D. photon Correct Answer: Option A – neutron Explanation In a nuclear reaction, neutron is used as a bullet fired into 23592U, to trigger off nuclear chain reaction, which of course is...
by Sunday | Nov 15 | Physics JAMB
A. hysteresis loss B. eddy current loss C. magnetic flux leakage D. heating in the cells Correct Answer: Option B – eddy current loss
by Sunday | Nov 15 | Physics JAMB
A. 8% B. 5% C. 3% D. 1% Correct Answer: Option C = 3% Explanation After 5 half-lives, the fraction of any radio-active substance left = (1/2)5 = 1/32 Thus the percentage of the original nuclie = 1/32/1 x 100/1 assuming the original amount is unity percentage left...
by Sunday | Nov 15 | Physics JAMB
A. 2.00 x 10-28J B. 1.30 x 10-28J C. 2.00 x 10-29J D. 1.30 x 10-28J Correct Answer: Option A Explanation A photon of energy E = hf = 6.63 x 10-34 x 3 x 105 = 19.89 x 10-29 = 2.0 x 10-28J
by Sunday | Nov 15 | Physics JAMB
A. trivalent atoms B. tetravalent atoms C. pentavalent atoms D. hexavalent atoms Correct Answer: Option A – trivalent atoms
by Sunday | Nov 15 | Physics JAMB
A. 1Ω B. 2Ω C. 3Ω D. 4Ω Correct Answer: Option C = 3Ω Explanation I = V/R = 0.6E/3 = 0.2E Again, I = E / (R+ϒ) = E / (3+ϒ) Divide eqn (2) by eqn (1) I/I = E / (3+ϒ) x I / 0.2E => 0.2(3+ϒ) = 1 0.6 x 0.2ϒ = 1 ∴0.2ϒ = -0.6 => ϒ = 0.6 / 0.2 = 3Ω ϒ =...
by Sunday | Nov 15 | Physics JAMB
A. x -rays B. ultraviolet rays C. infrared rays D. gamma rays Correct Answer: Option B – ultraviolet rays
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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