K.C.S.E Physics Q & A - MODEL 2009PP2QN14
(a) Figure 7 shows a pair of parallel plates of a capacitor connected to a Battery the upper plates is displaced slightly to the left.
State with reason the effect of this movement of the capacitance
(b) Figure 8 shows an electrical circuit with three capacitors A, B and C of capacitance 4.0 μF, 5.0 μF and 3.0 μF respectively connected to a 12V battery
(i) The combined capacitance of the three capacitors
(ii) The charge of the capacitor A
(iii) The potential difference across the capacitors B
K.C.S.E Physics Q & A - MODEL 2009PP2QN13
Figure 6 (a) and figure 6 (b) show a p-n junction to a battery. It is observed that the current in figure 6 (a) is greater than the current in figure 6 (b)
K.C.S.E Physics Q & A - MODEL 2009PP2QN12
A boy standing in front of a cliff blows a whistle and hears the echo after 0.5s. He then moves 17 metres further away from the cliff and blows the whistle again. He now hears the echo after 0.6s. Determine the speed of the sound.
K.C.S.E Physics Q & A - MODEL 2009PP2QN11
In an X- ray tube it is observed that the intensity of X- rays increases when potential differences across the filament is increased. Explain this observation
K.C.S.E Physics Q & A - MODEL 2009PP2QN10
Figure 5 shows a magnet being moved towards a stationary solenoid. It is observed that a current flows through the circuit in a direction Q to P.
(i) How the current is produced
(ii) Why the current flows from Q to P
(i) Movement of magnet causes flux linkage to change
E.M.F is produced in the cell.
(ii) When 1 flow from Q to P, a N. pole is created which opposes the approaching pole (long’s law).
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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