2020
A substance has half of 3 min. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?
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2020 JAMB UTME Physics Past Questions
2020
Which of the following pairs ispart of the electromagnetic spectrum?I. Radio wavesII. sound wavesIII. Gamma raysIV. water waves
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2020
In which of the following diagrams is the length of the tube equal to one wavelength?
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2020
Which of the following instruments consumes the highest current?I. Electric ironII. Television setIII. Torch lightIV. Immersion heater250v220v6v110v1kW110W30W500W
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2020
In the figure, the value of R is
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2020
In an experiment in which molten naphthaleneis allowed to cool, the cooling curve i n the figure was obtained. The temperature 80\(^o\)C is known as the
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2020
The fiqure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40\(^o\), then the value of W is
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2020
Two divers G and H are at depths 20m and 40m, respectively below the water surface in a lake. The pressure on G is p\(_1\) while the pressure on H is P\(_2\), If the atmospheric pressure is equivalent to 10mof water, the…
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2020
Heat is supplied uniformly at the rate of 100W to 1.0 x 10\(^{-2}\)kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5\(^o\)C, then the specific heat capacity of the liquid is
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2020
The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mmabove the lower fixed point in a room. What is the temperature of the room in de…
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2020
The linear expansivityof brass is 2 x 10\(^{-5}\) \(^oC^{-1}\). If the volume of piece of brass is 10cm\(^3\) at 0\(^o\)C. What will be its volume at 100\(^o\)C?
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2020
Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media?I. Light is passing from optical denser medium to optically less dense…
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2020
Which of the following statements about defects of vision is/are CORRECT?I. Fora long sighted person, close objects appear blurredII. For a short sighted person, distant objects appear blurredIII. Short sight is correcte…
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2020
A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms-1, h…
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2020
The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10\(^8ms^{-1}\), the velocity of light in the liquid is
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2020
Consider the three forces acting at O and in equilibrium as shown in the figure. Which of the following equations is/are CORRECT?I.P\(_1\) cos\(\theta_1\) = p\(_1\) cos \(\theta_2\)II. P\(_3\) = P\(_1\) cos \(\theta_4\)…
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2020
A hydrometer is an instrument formeasuring the
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2020
A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are
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2020
Two mirrors of the same length are arranged as shown in the diagram. A ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through
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2020
A convex mirror is used as a driving mirror becauseI. its image is erect II. It has a large field of viewIII. It has a long focal lengthIdentify the CORRECT statement(s)
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