# 2016 - JAMB Physics Past Questions & Answers - page 1

1
Myopic defects in the human eye can be corrected through the use of a
A
Concave Mirror
B
Concave lens
C
Prism
D
Convex lens
CORRECT OPTION: b
2
A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will
A
Be a straight line
B
Curve inwards
C
Be a parabola
D
Curve outwards
CORRECT OPTION: a
3
What happens to a water pool on a day when the humidity of the air is very low?
A
Temperature decreases
B
Slow evaporation
C
Temperature increases
D
Rapid evaporation
CORRECT OPTION: d
4
A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is
A
$$\frac{g}{16}$$
B
$$\frac{g}{4}$$
C
$$\frac{4}{g}$$
D
$$\frac{16}{g}$$
CORRECT OPTION: a
$$\frac{g}{R^2}$$ = $$\frac{g}{4^2}$$ = $$\frac{g}{16}$$
5
I.Chemical II.Sound III.Electricity

Which of the above forms of energy can directly be converted to light energy?
A
I and II only
B
II and III only
C
I, II and III
D
I and III only
CORRECT OPTION: d
6
If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object
A
B
Is halved
C
Remains the same
D
Is double
CORRECT OPTION: d
7
An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is
A
80cm
B
40cm
C
50cm
D
70cm
CORRECT OPTION: b
8
Which of the following statements is correct about a machine?
A
Efficiency of a machine is always greater than I
B
Efficiency decreases with an increase in friction
C
Velocity ratio depends on friction
D
Mechanical advantage increases with an increase in friction
CORRECT OPTION: b
9
The instrument used to view stars is the
A
Prism binoculars
B
Telescope
C
Film projector
D
Microscope
CORRECT OPTION: b
10
What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?
A
60
B
10
C
30
D
90
CORRECT OPTION: b
M = $$\frac{y}{x}$$ = $$\frac{30}{3}$$

= 10
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