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An electrical heater rated 240 v, 2000 w is to be connected to a 240 v mains supply through a fuse of 9.0 A. Will the fuse be suitable? Give a reason.
Date posted:
October 9, 2017
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A n electric bulb rated, 4W is operating on a 240 v mains. Determine the filament’s resistance.
Date posted:
October 9, 2017
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A capacitor is connected to the distributor in some petrol engines which use spark plugs. What is its function?
Date posted:
October 9, 2017
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What does polarization show in light?
Date posted:
October 9, 2017
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State two conditions under which Ohm’s law is obeyed in a given metal.
Date posted:
October 9, 2017
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If the p.d. of 0.75 v is applied at the end of a wire of length 1.0 m long with a cross-sectional area of 1.6 x 10^-4 m^2 and a current of 1.4 A flow through it. Calculate its resistivity.
Date posted:
October 9, 2017
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Given that the resistance of a wire is 1 ohm. Its resistivity is 5.0 x10^-7 ohms and its cross- sectional area is 4.0 x 10 -6 m^2. Find its length.
Date posted:
October 9, 2017
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A sliding body on an inclined plane is affected by some factors. Name two factors.
Date posted:
October 9, 2017
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A horizontal force of 24 N is applied on a metallic block of mass 5kg placed on a horizontal surface. The block was accelerated to 10 m/s^2. Determine the frictional force between the block and the surface.
Date posted:
October 9, 2017
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A wheelbarrow of mass 50 kg was pushed along a horizontal path by a horizontal force of 10 N and moves with a constant velocity. The force was then increased to 18N. Determine :
a. The resistance to the motion of the wheelbarrow
b. The acceleration of the wheelbarrow.
Date posted:
October 9, 2017
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State any three ways in which the induced emf in the generator can be increased.
Date posted:
October 9, 2017
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State types of transformers
Date posted:
October 9, 2017
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State three factors that affect electrical energy.
Date posted:
October 9, 2017
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State the factors affecting resistance of a conductor.
Date posted:
October 9, 2017
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State three disadvantages of lead acid accumulators
Date posted:
October 9, 2017
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State two disadvantages of simple cell.
Date posted:
October 9, 2017
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State two types of cells.
Date posted:
October 9, 2017
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What is a capacitor?
Date posted:
October 9, 2017
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Define Surface charge density.
Date posted:
October 9, 2017
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State two properties of electric field lines
Date posted:
October 9, 2017
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Describe three ways of discharging an electroscope
Date posted:
October 9, 2017
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State two methods of charging an electroscope.
Date posted:
October 9, 2017
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State the functions of the following parts of the gols-leaf electroscope.
1. Insulator
2. Metal plate
Date posted:
October 9, 2017
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State three methods of demagnetization
Date posted:
October 9, 2017
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State four methods of magnetization.
Date posted:
October 9, 2017
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Define dispersion as used in refraction.
Date posted:
October 9, 2017
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Define the absolute refractive index of a medium.
Date posted:
October 9, 2017
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State the main disadvantage of convex mirrors.
Date posted:
October 9, 2017
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State two applications of lens.
Date posted:
October 8, 2017
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State any three disadvantages of a liquid in glass thermometers
Date posted:
October 8, 2017