2000
Absorption line spectra exhibited by atoms is a result of
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2000 WAEC SSCE Physics Past Questions
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2000
A material of mass 1.0 x 10-2kg undergoes a fission process which decreases its mass by 0.02 percent. Calculate the amount of energy released in the process. (c = 3.0 x 108ms-1)
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2000
The half life of a radioactive substance is 14 days. If 48g of this substance is stored, after how many days will 1.5g of the original substance remain?
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2000
A nuclide \(^{202}_{84} Y\) emits in succession an \(\alpha-particle\) and a \(\beta-particle\). The atomic number of the resulting nuclide is
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2000
The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm-3, g = 10ms-2]
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2000
The nucleon number and the proton number of a neutral atom of an element are 23 and 11 respectively. How many neutrons are present in the atom?
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2000
A proton of wavelength \(\lambda_o\) is emitted when an electron in an atom makes a transition from a level of energy 2E. If the electron transits from \(\frac{4}{3}E_k\) to E level, determine the wavelength of the photo…
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2000
In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]
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2000
The duality of matter implies that matter
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2000
In a nuclear reactor, electricity can be generated through the following processes. Arrange the processes in the correct order. i. The steam is used to drive turbines. ii. The heat energy released is removed by passing…
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2000
A nuclide represented as \(^{70}_{32}X\) has a neutron-proton ratio of
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2000
A magnet is being inserted into a coil of wire. On which of the following factors does the induced e.m.f in the coil depend? I. Number of turns in the coil II. Strength of the coil III. Speed with which magnet is inserte…
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2000
In the actual exam, a setup will be provided that includes an accumulator, a standard resistor (S), a resistance box (R), an ammeter, and a key (K), all connected in a circuit as shown in the diagram. The e.m.f. of the a…
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2000
The experiment setup in the question involves fixing a meter rule on a bench, placing an illuminated object at one end and a screen at the other, and using a converging lens to form images. By moving the lens between the…
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2000
In the actual exam, a setup will be provided that includes using a spring balance to determine the weight of an object in air and when completely immersed in water and another liquid. The experiment is designed to explor…
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2000
(a)(1) State the energy transformations which take place during the operation of a modern x-ray tube. (ii) Distinguish between hard and soft x-rays.(iii) State three uses of x-rays.(iv) Mention one hazard of over-exposu…
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2000
(a) Define the following terms:(i) Electric field intensity(ii) Electric potential(b) The diagram below illustrates two collinear electric charges of magnitudes + Q and -Q. The charges are equidistant from a point P at w…
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2000
(a)(i) State the laws of refraction of light.(ii) Describe an experiment to determine the refractive index, n, of the material of an equilaleral triangular glass prism using the minimum deviation method.(b) A rectangular…
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2000
(a)(i) Mention two modes of heat transfer other than convection.(ii) Explain land and sea breezes.(b) An iron rod of length 30cm is heated through 50 kelvin. Calculate its increase in length. (linear expansivity of iron…
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2000
(a)(i) Define the term linear momentum.(ii) State the law of conservation of linear momentum.(b) A ball P of mass 0.25 kg, loses one-third of its velocity when it makes a head on collision with an identical ball Q at res…
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