2004 - JAMB Physics Past Questions and Answers - page 2
11
In a hydraulic press , a force of 40N is applied on the effort piston of area 0.4m2. If the force exerted on the load piston is 400N, the area of the large piston is
A
4m2
B
8m2
C
2m2
D
1m2
12
A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is
A
0.4
B
1.0
C
0.8
D
0.5
13
As the pressure of a fluid increases, its viscosity
A
decreases
B
increases
C
increases then decreases
D
remains constant
14
A
13N
B
17N
C
√3N
D
7√3N
15
The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is
A
1:80
B
1:320
C
1:1280
D
1:4
16
In which of the following material media will sound travel fastest?
A
oil
B
metal
C
gas
D
water
17
What types of mirror are capable of producing parallel beams of light such as those arising from the headlamps of a car?
A
Parabolic mirrors
B
Plane mirrors
C
Cylindrical mirrors
D
Spherical mirrors
18
What happens to the rays in a parallel beam of light?
A
They diverge as they travel
B
they intersect
C
They converge as they travel
D
They meet at infinity.
19
A ray of light makes an angle of 35o with a plane mirror. What is the angle of reflection?
A
35o
B
55o
C
70o
D
65o
20
A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity
A
Convex lens
B
Binoculars
C
Concave lens
D
Plane glasses
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