K.C.S.E Physics Q & A - MODEL 1999PP1QN32
Sketch a diagram to show the position of an object, when a converging lens is used as an magnifying glass.
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K.C.S.E Physics Q & A - MODEL 1999PP1QN31
Figure 15 shows two masses 0.1kg and 0.2kg connected by a string through a hole on a smooth horizontal surface.
The 0.1kg mass rotates in a horizontal circle of radius 3cm. Calculate the angular velocity of the mass when the system is in equilibrium. Use acceleration due to gravity g= 10ms-2
K.C.S.E Physics Q & A - MODEL 1999PP1QN30
It is observed that when ultraviolet light is shone onto a clean zinc plate connected to the cap of negatively charged leaf electroscope, the leaf collapse. Explain this observation.
ANSWERS
K.C.S.E Physics Q & A - MODEL 1999PP1QN29
A concrete block of volume V is totally immersed in seawater of density p. Write an expression for the up thrust on the block.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN28
Arrange the following in order of increasing frequencies –Gamma radiation, radio waves, infrared, and X –rays.
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K.C.S.E Physics Q & A - MODEL 1999PP1QN27Determine the pressure required to compress a gas in a cylinder initially at 20C and at a pressure 1.03 x 10-5 to one-eight of its original volume.K.C.S.E Physics Q & A - MODEL 1999PP1QN26
The figure 14 is a resistor-capacitor circuit. At time t=0, the switch is closed at A for sometime, and then opened. The switch is them closed at B for sometime.
On the axis provided, sketch the graph of voltage V across the capacitor against time t(t1 and t2 represents times for opening at A and closing at B respectively).
K.C.S.E Physics Q & A - MODEL 1999PP1QN25
Figure 13 shows a section of a pipe PQ. A constant pressure difference maintains a streamline flow of a liquid in the pipe
If the cross-sectional area A1 at P is less than A2 at Q, state how the liquid velocity. V2 at Q compares with velocity V1 at P.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN24
A bullet is fired horizontally at a target. Neglecting air resistance give a reason why the horizontal acceleration of the bullet is zero.
ANSWERS
K.C.S.E Physics Q & A - MODEL 1999PP1QN23
State the energy transformation when fast moving electrons are suddenly stopped by a target in an X- ray tube.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN22
A microscope is focused on a mark on horizontal surface. A rectangular glass block 30mm thick is place on the mark. The microscope is then adjusted to 10mm upwards: to bring the mark back to focus. determine the refractive index of the glass
K.C.S.E Physics Q & A - MODEL 1999PP1QN21
A galvanometer of internal resistance 5OÃ gives a full-scale deflection when a current of 10mA passes through it. Determine the value of the resistance required to convert the galvanometer to a voltmeter with full-scale deflection of 5 volts.
K.C.S.E Physics Q & A - MODEL 1999PP1QN20
A substance of mass 2kg and specific heat capacity 400 Jkg K initially at 81°C is immersed in water at 20°C. If the final temperature is 21°C. Determine the mass of water. (The specific heat capacity of water is 4200j/kgK). Give your answer to 1 decimal place
K.C.S.E Physics Q & A - MODEL 1999PP1QN19
When a current of 2.0 flows in a resistor for 10 minutes, 15,000 joules of electrical energy is displaced. Determine the voltage the resistor.
K.C.S.E Physics Q & A - MODEL 1999PP1QN18
Two tuning forks of frequencies 256Hz and 258 Hz are sounded simultaneously and then placed close to each other, calculate the beat frequency.K.C.S.E Physics Q & A - MODEL 1999PP1QN17
Figure 12 shows how displacement varies with time as a wave passes a fixed point
Determine the frequency of the waves
K.C.S.E Physics Q & A - MODEL 1999PP1QN16
Figure 11 is a graph which shows how the vertical height through which a machine raises a mass 20kg varies with time.
Determine the power output of the machine after 40 seconds.
K.C.S.E Physics Q & A - MODEL 1999PP1QN15An industrial trolley of mass 20kg carrying a mass of 50kg is acted on by a constant force. The trolley moves along a horizontal smooth surface with an acceleration of 0.5ms-2 . Determine the acceleration of the trolley after the mass falls off.K.C.S.E Physics Q & A - MODEL 1999PP1QN14
Determine the moment of the couple shown in figure 10.
K.C.S.E Physics Q & A - MODEL 1999PP1QN13
Figure 9 shows a wire carrying a current whose direction is into the paper.
The wire is placed in a magnetic field.
Indicate on the figure the direction of the force acting on the wire.
K.C.S.E Physics Q & A - MODEL 1999PP1QN12
How can it be shown that the strength of a magnet is concentrated at the poles?
ANSWERS
K.C.S.E Physics Q & A - MODEL 1999PP1QN11
A wire fixed at one end extends by 4mm when a load of 20N is suspended from the other end. Determine the load that would cause an extension of 1.5 mm on the wire (assume elastic limit is not exceeded)
K.C.S.E Physics Q & A - MODEL 1999PP1QN10
Determine the ammeter reading when a p.d of 3.0 volts is applied across Pq in figure 8.
K.C.S.E Physics Q & A - MODEL 1999PP1QN09
Figure 7 shows a sharp pin fixed on a cap of leaf electroscope. The electroscope is highly charged and then left for sometime.
Explain why the leaf collapses
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN08
Figure 6 shows a ray of light incident on plane mirror at point O.
The mirror is rotated clockwise through an angle 300 about an axis perpendicular to the paper. Determine the angle through which the reflected ray rotated.
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