The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate the temperature in degrees Celsius when the thermometer reads 45mm
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2005
The distance between two points in phase on a progressive wave is 5cm. If the sped of the wave is 0.2ms-1, calculate its period
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2005
Which of the following statements about a progressive mechanical wave is correct?
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2005
The pressure exerted by a given mass of gas in a container
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2005
Which of the following statements is correct?
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2005
Which of the following statements about boiling and evaporation at atmospheric pressure is correct?
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2005
In which of the following media is the transmission of sound wave fastest?
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2005
A ray of light is incident normally on a plan mirror. If the incident ray is kept fixed while the mirror is rotated through an angle of 30o, determine the initial and final angles of reflection respectively
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2005
Which of the following optical instruments does not depend on the use of plane mirrors?
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2005
Radio waves travel in air at 3.0 x 108ms-1. If the waves enter water of refractive index \(\frac{4}{3}\), calculate the speed of radio waves in water
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2005
a chemical cell of internal resistance 1\(\Omega\) supplies electric current to an external resistor of resistance 3\(\Omega\). Calculate the efficiency of the cell
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2005
A parallel plate capacitor of capacitance 600\(\mu F\) has a potential difference of 200V between its plates. Calculate the charge on either plate of the capacitor
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2005
Two capacitors if capacitance 0.4\(\mu F\) and 0.5\(\mu F\) are connected in parallel and charged to a p.d. of 50V, Determine the total charge acquired
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2005
The ability of a material to store an electric charge when its plates are at different potentials is referred to as its
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2005
The mass and weight of a body on earth are 8kg and 80N respectively. Determine the mass and weight of the body respectively on a planet where the pull of gravity is \(\frac{1}{8}\) that on earth
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2005
A constantan wire has a cross sectional area of 4 x 10-8m2 and a resistivity of 1.1 x 10-6\(\Omega\)m. If a resistor of resistance 11\(\Omega\) is to be made from this wire, calculate the length of the wire required
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2005
Which of the following statements explains lost volt in an electric circuit? The
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2005
An electric lamp is rated 240V, 40W. What is the cost of running the lamp for 72 hours if the electricity authority charges N2.50 per kWh?
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2005
Which of the following statements is not a reason for using soft iron in making the core of a transformer? It
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2005
Which of the following statements is an advantage of nuclear fusion over nuclear fission?