by Sunday | Nov 16 | Physics JAMB
A. 5 ms−¹ B. 20 ms−¹ C. 30 ms−¹ D. 40 ms−¹ Correct Answer: Option B = 20 ms−¹
by Sunday | Nov 16 | Physics JAMB
A. y = 0.15 sin 200π(x – 5.5t) B. y = 0.15 sin π(0.01x – 5.5t) C. y = 0.15 sin 5.5π(x – 200t) D. y = 0.15 sin π(550x – 0.01t) Correct Answer: Option A – y = 0.15 sin 200π(x – 5.5t) Explanation The general wave equation is given by Y...
by Sunday | Nov 16 | Physics JAMB
A. 60 ms−² B. 20 ms−² C. 15 ms−² D. 10 ms−² Correct Answer: Option B – 20 ms−² Explanation The velocity V = 10 + 2t² But acceleration, a = dv/dt thus if V = 10 + 2t² dv/dt = 4t And t = 5s then a = 4×5 = 20m/s² ∴a =...
by Sunday | Nov 16 | Physics JAMB
A. 1.7V B. 2.0V C. 8.0V D. 15.0V Correct Answer: Option B – 2.0V Explanation For a photoemitted electron, eV = K.E.max, where V = stopping potential and K.E. = maximum kinetic energy of the photo emitted electron given by K.E. = Energy of incident rad –...
by Sunday | Nov 16 | Physics JAMB
A. 0.2N B. 0.8N C. 3.2N D. 8.0N Correct Answer: Option B – 0.8N Explanation The force on the conductor is maximum when the conductor lies perpendicular to the field during which the maximum force is given as; F = ILB = 0.8 x 2 x 0.5 =...
by Sunday | Nov 16 | Physics JAMB
A. 25% B. 33% C. 50% D. 75% Correct Answer: Option D – 75% Explanation Efficiency = Output/input x 100/1 Efficiency = 3/(3+1) x 100/1 = 3/4 x 100/1 = 75%
by Sunday | Nov 16 | Physics JAMB
A. 200 Ω B. 50 Ω C. 100/π Ω D. 25/π Ω Correct Answer: Option A = 200 Ω Explanation Inductive reactance is given by XL = WL = 2πfL XL = 2 x π x (50/π) x 2 XL = 200Ω
by Sunday | Nov 16 | Physics JAMB
A. beta rays B. gamma rays C. x-rays D. ultra-violet rays Correct Answer: Option A – beta rays
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 =...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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