1979
Which of the following is the correct definition of 'half-life'?
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1979 JAMB UTME Physics Past Questions
1979
An electric cell has an internal resistance of 2 ohms. A current of 0.5A is found to flow when a resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell?
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1979
Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by
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1979
An air bubble rises from the bottom to the top of a water dam which is 40m deep. The volume of the bubble just below the surface is 2.5cm3. Find its volume at the bottom of the dam, if atmospheric pressure is equivalent…
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1979
Which of the following statements is true? The frequency of a vibrating string is
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1979
A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is
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1979
Consider a thick glass tumbler and a thin glass tumbler which are made of the same kind of glass. Some hot liquid is poured into them. Which of the following statements is correct?
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1979
Which of the following statements about radioactivity are true? i. alpha particle is positively charged ii. Beta particle is negatively charged iii. Gamma ray is neutral iv. Beta particle has the same mass as helium atom…
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1979
A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is
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1979
On which of the following is the operation of a moving coil galvanometer based?
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1979
The speed of light in air is 3 x 108ms-1. If the refractive index of light from air-to-water is \(\frac{4}{3}\), then which of the following is the correct value of the speed of light in water?
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1979
All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?
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1979
Which of the following electromagnetic waves has the shortest wavelength?
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1979
Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent
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1979
Radio carrier waves are generated by causing electrons to oscillate rapidly in
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1979
A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever bal…
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1979
It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?
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1979
A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is
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1979
In a resonance tube experiment, which is illustrated above, the velocity of sound in air is 327.68m/s, the frequency of the turning fork used is therefore
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1979
An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm column of mercury with the tube held vertically as shown above. On inverting the tube the air column becomes 15cm long. The atmospher…
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