by Sunday | Nov 12 | Physics JAMB
A. 2.55 x 105 Ωm B. 2.55 x 102 Ωm C. 3.93 x 10-6 Ωm D. 3.93 x 10-8 Ωm Correct Answer: Option D – 3.93 x 10-8 Ωm Explanation R = (1)/a, P = (R.a)/1 = (0.1 x 3.14)/2 (10-3/2)3 ∴ P = (0.1 x 3.14 x 10-6)/2 x 4 = 0.3925 x 10-7 OR -3.930 X 10-8...
by Sunday | Nov 12 | Physics JAMB
A. 0.8 J B. 1.8 J C. 9.0 J D. 18.0 J Correct Answer: Option B = 0.8 J Explanation Work done = product of the charge Q, and the p.d V. (i)/e work done = Q.V = 600 x 10-6 x 3.0 x 10-3 = 1.8 J.
by Sunday | Nov 12 | Physics JAMB
A. 37.50 cm B. 75.00 cm C. 18.75 D. 25.00 cm Correct Answer: Option A – 37.50 cm Explanation The least distance of distinct vision required = 25 cm. ∴ for the person to see an object clearly at 25 cm from the eye, the image must be formed at 75 cm on the same...
by Sunday | Nov 12 | Physics JAMB
A. 33 cm B. 44 cm C. 22 cm D. 17 cm Correct Answer: Option B = 44 cm Explanation In a closed tube, the fundamental note occurs when the length of the tube l = (λ)/4, the first over tone occurs when the length of the tube l = (3)/4λ. λ = (4)/3 l = (4)/3 x (33)/T = 44...
by Sunday | Nov 12 | Physics JAMB
A. reflect light B. are near C. are polished D. emit light Correct Answer: Option A = reflect light
by Sunday | Nov 12 | Physics JAMB
A. 45 m B. 80 m C. 15 m D. 60 m Correct Answer: Option C – 15 m Explanation Refraction index (n)= (Real depth)/App. depth For 80 m Real depth: (4)/3 = (80)/App. depth App. dept = (80 x 3)/4 = 60 m For 60 m real depth; (4)/3 = (60)/ App. depth App. depth = (60 x...
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