by Sunday | Nov 15 | Physics JAMB
A. 51.9Ω B. 52.9Ω C. 55.9Ω D. 57.6Ω Correct Answer: Option B = 52.9Ω Explanation Electric Power = IV = I2R = V2/R thus for a device rated 1000 W, 230V, from the relation P = V2/R, 1000 = (230)2/R => R = (230)2/1000 = 52900/1000 =...
by Sunday | Nov 15 | Physics JAMB
A. cornea B. iris C. retina D. optic nerve Correct Answer: Option B – iris Explanation The iris controls the amount of light by limiting the volume of light admitted. The lens then focuses the light onto the retina, forming an inverted image. The lens changes...
by Sunday | Nov 15 | Physics JAMB
A. 2 A B. 3 A C. 4 A D. 5 A Correct Answer: Option C = 4 A Explanation 1 KW = 1000 watts, power P = IV, thus for a mains of 250 V, the maximum permissible Current I = 1/V = 1000/250 = 4 A Thus the fuse rating in the plug should be 4...
by Sunday | Nov 15 | Physics JAMB
A. 5 x 104 J B. 4 x 102 J C. 4 x 10-3 J D. 5 x 10-4 J Correct Answer: Option D = 5 x 10-4 J Explanation The energy stored in a given capacitor is given by E = 1/2 CV2 = 1/2 QV = 1/2Q2/C Where C = the capacitance of the capacitor Q = charge carried by the capacitor V =...
by Sunday | Nov 15 | Physics JAMB
A. stationary waves B. transverse waves C. longitudinal waves D. mechanical waves Correct Answer: Option C – longitudinal waves Explanation In longitudinal waves, such as sound waves in a liquid or gas, the displacement of the particles in the oscillation is...
by Sunday | Nov 15 | Physics JAMB
A. 2.49 x 105 Nm-2 B. 7.47 x 105 Nm-2 C. 2.49 x 106 Nm-2 D. 7.47 x 106 Nm-2 Correct Answer: Option D = 7.47 x 106 Nm-2 Explanation From the relation PV = nRT V = 10-3; n = 3 moles; T = 27 + 273 = 300k R = 8.3 j mol-1 K-1 => P = nRT/V = 3 X 8.3 X 300/10-3 = 7.47 X...
by Sunday | Nov 15 | Physics JAMB
A. acoustic vibration B. rarefaction C. echo D. reverberation Correct Answer: Option D – reverberation
by Sunday | Nov 15 | Physics JAMB
A. increasing its surface area B. decreasing its vapour pressure C. increasing its temperature D. decreasing its density Correct Answer: Option B – decreasing its vapour pressure Explanation if you blow-dry air over the glass you blow away this extra water...
by Sunday | Nov 15 | Physics JAMB
A. undeviated and undisplaced at a lower speed B. deviated and undisplaced at a lower speed C. deviated and displaced at a lower speed D. undeviated and displaced at a faster speed Correct Answer: Option A – undeviated and undisplaced at a lower speed...
by Sunday | Nov 15 | Physics JAMB
A. is opaque B. is a poor conductor C. wets glass D. has low vapour pressure Correct Answer: Option B – is a poor conductor
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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