K.C.S.E Physics Q & A - MODEL 2019PP1QN01
A micrometer screw gauge has a -0.03 mm error. State the reading that is observed on the instrument when used to measure the diameter of a wire whose actual diameter is 0.38 mm.
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K.C.S.E Physics Q & A - MODEL 2019PP2QN14
​Figure 6 shows radiation from the sun passing through glass in a greenhouse onto the floor. The floor then emits radiation
​State the name of the radiation emitted by the floor.
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN13
State the disadvantage using a convex mirror as a driving mirror
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN12
​ Uranium decays as shown below.
​Name the particle X that is emitted during this decay.
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN11
​Figure 5 shows part of the lighting circuit in a house.
​State two errors in the wiring circuit.
answers
K.C.S.E Physics Q & A - MODEL 2019PP2QN10
State how the intensity of X-rays in an X-ray tube can be increased.
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN09
​Figure 4 shows the input and output signals on a CRO screen when two diodes are used during a full wave rectification.
​Explain how the two diodes rectify the input signal.
answers
K.C.S.E Physics Q & A - MODEL 2019PP2QN08
State two uses of gamma rays in medicine.
answers
K.C.S.E Physics Q & A - MODEL 2019PP2QN07
​Figure 3 shows a cell connected in series with an ammeter, a 2 ohms resistor and a switch.A voltmeter is connected across the cell.
​With the switch open, the voltmeter reads 1.5 V. Given that the internal resistance of the cell is 0.5 ohms , determine the ammeter reading when the switch is closed.
K.C.S.E Physics Q & A - MODEL 2019PP2QN06
State the reason why the current produced by a simple cell falls rapidly when the cell is being used,
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN05
​In a siren, sound is produced when a jet of air is directed perpendicular to a ring of holes on a rotating wheel. Explain the effect on the pitch of sound produced when the speed of rotation of the wheel is increased.
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN04
​Figure 2 shows an incomplete circuit for an electromagnet.
​(a) Complete the diagram to show how a battery should be connected at A so that the polarities at P and Q are South and North respectively.
(b) State two ways in which the strength of the electromagnet in (a) can be increased.
K.C.S.E Physics Q & A - MODEL 2019PP2QN03
State two properties of magnetic field lines around a bar magnet.
answers
K.C.S.E Physics Q & A - MODEL 2019PP2QN02
State the reason why an increase in leaf divergence is the only sure way of determining whether an object is negatively charged using a negatively charged electroscope.
answer
K.C.S.E Physics Q & A - MODEL 2019PP2QN01
Figure 1 shows two plane mirrors inclined at an angle of 120 to each other. A ray of light makes an angle of 40° with the first mirror.​
​By completing the ray diagram determine the angle of reflection on the second mirror.
K.C.S.E Physics Q & A - MODEL 2018PP2QN14
Figure 3 shows two current-carrying wires A and B passing through a cardboard.​
​On the diagram, sketch the magnetic field lines around the wires to show how the fields interact.
K.C.S.E Physics Q & A - MODEL 2018PP2QN13
State the meaning of the term battery.
answer
K.C.S.E Physics Q & A - MODEL 2018PP2QN12
State the purpose of manganese(IV) oxide in a dry cell
answer
K.C.S.E Physics Q & A - MODEL 2018PP2QN11
​Arrange the following radiations in the order of increasing wavelengths;
Purple light, Gamma rays, infrared and ultraviolet
answer
K.C.S.E Physics Q & A - MODEL 2018PP2QN10
The sharp point of a pin is brought near the cap of a negatively charged electroscope .State and explain the observation made on the leaf of the electroscope
answer
K.C.S.E Physics Q & A - MODEL 2018PP2QN09
​A transformer has 600 turns in the primary coil and 9000 turns in the secondary coil. The transformer is 100% efficient and the current in the secondary coil is 0.15A, determine current in the primary coil.
K.C.S.E Physics Q & A - MODEL 2018PP2QN08
Define radioactivity
answer
K.C.S.E Physics Q & A - MODEL 2018PP2QN07
​Figure 2 shows the image of an object O placed on the principle axis of a convex mirror.
​On the figure, draw a ray diagram to locate the object.
K.C.S.E Physics Q & A - MODEL 2018PP2QN06
An electric kettle is rated 1.8kW, 240 V. Determine the rating of the fuse that may be used in the kettle.K.C.S.E Physics Q & A - MODEL 2018PP2QN05
​The angle of incident for a ray of light moving from air to a certain liquid is 30. Given that the refractive index of the Liquid is 1 .36, determine the angle of refraction.
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