Physics Past Questions and Answers

Total internal reflection will not occur when light travels from

A Water to air
B Water into glass
C Glass to air
D Glass into water

Question 32:

If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope

A 2
B 3
C 11
D 28

Question 33:

The angle of deviation of light of various colours passing through a triangular prism increases in the order

A Red â†’ green â†’ blue
B Green → violet → blue
C Blue â†’ red â†’ green
D Blue â†’ green â†’ red

Question 34:

Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1

A 1.5x10^-11N
B 1.5x10^-12N
C 1.5x10^-13N
D 1.5x10^-14N

Question 35:

Capacitors are used in the induction coil to

A Control circuits
B Prevent distortion of electric fields
C Prevent electric sparks
D Dissipate energy