An atom is normally electrically neutral because the
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2004
The main function of the mouth piece of a telephone is that it converts sound energy to
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2004
In an experiment using a converging lens to produce real images on a screen, the linear magnification m, is plotted against the image distance v, as illustrated in the diagram below. The distance OP represents the
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2004
A radioactive substance has a half-life of 3 days. If a mass of 1.55g of this substance is left after decaying for 15 days, determine the original value of the mass
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2004
Which of the following statements about X-rays is not correct? They
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2004
A force acting on a body causes a change in the momentum of a body from 12 kg ms-1 to 16kg ms-1 in 0.25. Calculate the magnitude of the impulse
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2004
Which of the following is not an evidence of the particle nature of matter?
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2004
According to the kinetic theory of gases the collisionOf the molecules of a gas with the wall of the containerIs mainly responsible for the l. temperature of theGas ll. viscosity of the gas Ill. pressure of the gasWhich…
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2004
A charge of 1.6 x 10-10C is placed in a uniform electric field of intensity 2.0 x 105NC-1. What is the magnitude of the electric force exerted on the charge?
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2004
Which of the following statements is not correct?
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2004
The magnitude of the expansion or contraction of a substance depends on the i. temperature change ii. nature of the substance iii. size of the substance. Which of the statements above are correct?
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2004
In the actual exam, a setup will be provided that includes measuring the e.m.f. of a cell, connecting a circuit as shown in the diagram, and recording various readings of current and voltage for different resistance sett…
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2004
In the actual exam, an image will be provided showing a setup with a concave mirror, a ray box, and a screen. The ray box emits light towards the concave mirror, which reflects the rays to form an image on the screen. Th…
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2004
In the actual exam, a physics experiment setup will be provided for demonstrating the principles of moments and equilibrium. The setup includes a meter rule balanced on a knife edge, with two weights suspended on either…
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2004
(a) (i) Explain electromotive force(ii) list two sources of electromotive force other than a chemical cell(b) A chemical cell of electromotive force, E, and internal resistance, r, is connected in series with an ammeter,…
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2004
(a) Explain;(i) wave motion(ii) stationary wave (b)(i) List four physical properties of a wave(ii) Define amplitude and use it to distinguish between the node and antinode of a stationary wave(iii) List the factors on wh…
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2004
Define upper fixed point and lower fixed point as used in thermometry(b) The electrical resistances of the element in a platinum restistance thermometer at 100\(^o\)C, 0\(^o\) and room temperature are 75.000, 63.000 and…
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2004
(a) Define gravitational field intensity(b) In an experiment to determine the acceleration of free-fall due to gravity, g, using a simple pendulum of length I, six different values of I were used to obtain six correspond…
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2004
(a) State two;(i) properties of x-rays(ii) reasons to show that x-rays are waves(iii) uses of x-rays other than those in medicine;(iv) hazards of x-rays.(b) The potential difference between the cathode and target of an x…
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2004
Give three observations in support of de Broglie's assumption that moving particles behave like waves.