K.C.S.E Physics Q & A - MODEL 2003PP1QN31
Arrange the following gin order of increasing frequency:
Visible light, infrared radiation, X – rays, u. v. radiation, radio waves.
K.C.S.E Physics Q & A - MODEL 2002PP1QN16
The chart below shows an arrangement of different parts of the electromagnetic spectrum
Name the radiation represented by A.
K.C.S.E Physics Q & A - MODEL 2001PP2QN02
a) Fig 1 (a) shows the circuit of a simple telephone receiver. When the telephone is lifted, a steady current flows through the solenoids. When a person speaks into the microphone on the other side, a varying current flows. These two currents are shown in fig. 1(b).
i) State the reason why solenoids are wounds in opposite directions around the soft-iron core pieces as shown.
ii) Explain how the speech current from the microphone is converted into sound in the receiver.
iii) State and explain the effect of replacing the soft iron core pieces with steel core pieces.
b) A step down transformer has 400 turns in the primary coil and 20 turns in the secondary coil A 50 ohms resister is connected to the secondary output. If the r.m.s (root-mean-square) value of the primary voltage is 240; determine the peak value of the current in the in the secondary circuit.
K.C.S.E Physics Q & A - MODEL 2000PP1QN29
State two uses of microwaves.
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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