JAMB UTME - Physics - 1981
Tambaya 1 Rahoto
A closed coil of wire is placed near a magnet. The magnet lies along the axis of the coil. Under which of the following conditions would there be no current in the coil?
Tambaya 3 Rahoto
The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt?
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Tambaya 6 Rahoto
The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is
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Tambaya 8 Rahoto
The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?
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Tambaya 9 Rahoto
Heat was supplied to a block of ice at 0oC until half of it melted. Which of the following statements is true?
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Tambaya 11 Rahoto
a balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.
Tambaya 13 Rahoto
An aircraft travelled from calabar to kano as follows: it flew first to ilorin convering a distance of 300km, 30o west of North, and then flew 400km, 60o East of North to kano. What is the resultant displacement?
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Tambaya 14 Rahoto
The effect of closing the key K in the circuit shown above would be to
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Tambaya 15 Rahoto
The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is
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Tambaya 18 Rahoto
If I is the current passing through a metallic resistor and H is the rate of Heat generated in the resistor at a constant temperature, then
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Tambaya 21 Rahoto
Which of the following statements is CORRECT?
Tambaya 23 Rahoto
Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?
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Tambaya 26 Rahoto
The lack of power of accommodation which is mainly due to the hardening of the eye lens and is usual with onset of old age is called?
Tambaya 27 Rahoto
Two particles X and Y starting from rest cover the same distance. The acceleration of X is twice that of Y. the ratio of the time taken by X to that taken by Y is
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Tambaya 28 Rahoto
An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is
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Tambaya 29 Rahoto
The relationship between the period T and the length T of a smile pendulum is T = 2\( \pi \) \( ( \frac{I}{g}) ^{ \frac{1}{2} } \). From experiment data of T and I, one can obtain the following graphs, i. T vs.I ii. T vs I2 iii. T2 vs. I iv. T vs \( \sqrt{I} \) v. logT vs logI. Which of the following graphs, are linear?
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Tambaya 31 Rahoto
When fixed mass of an ideal gas expands at constant temperature, which property of the gas molecule increases?
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Tambaya 32 Rahoto
If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called
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Tambaya 33 Rahoto
Which type of radiation does not NOT originate within the nucleus?
Tambaya 35 Rahoto
Which of the following statements is applicable to a real image formed by a concave mirror? i. it can be observed on a screen ii. it is always inverted and in front of the mirror iii. it only seams to exist IV. it is formed by the actual converging of rays of light
Tambaya 37 Rahoto
The quantity (timbre) of sound depends on
Tambaya 38 Rahoto
A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is
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Tambaya 40 Rahoto
All of the following frequencies are overtones of 320 Hz EXCEPT
Tambaya 41 Rahoto
A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil.If the input voltage is 100 volts, the output voltage is
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Tambaya 42 Rahoto
Which of the following is NOT directly associated with direct current (DC)?
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Tambaya 44 Rahoto
Which of the following does NOT describe the image formed by a plane mirror?
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Tambaya 45 Rahoto
Which of the following is NOT an effect that can be produced by an electric current?
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Tambaya 46 Rahoto
The principle of transmissibility of pressure in a fluid at rest in all directions is known as
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Tambaya 47 Rahoto
Which of the following elements are real magnetic materials?
