2013 - JAMB Physics Past Questions and Answers - page 3
21
What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?
A
It will be more than 100 oC
B
It will be last than 100 oC
C
It will still be at 100 oC
D
It will be fluctuating
correct option: a
Users' Answers & Comments22
The rise or fall of a liquid in a narrow tube is because of the
A
viscosity of the liquid
B
surface tension of the liquid
C
friction between the walls of the tube and the liquid
D
osmotic pressure of the liquid
correct option: c
Users' Answers & Comments23
The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is
A
covection
B
conduction
C
radiation
D
diffusion
correct option: b
Users' Answers & Comments24
A wave that travels through stretched strings is known as
A
electromagnetic wave
B
micro wave
C
mechanical wave
D
seismic wave
correct option: c
Users' Answers & Comments25
A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their
A
frequency
B
amplitude
C
direction of vibration of the particles of the medium
D
period of vibration of the particles of the medium
correct option: c
Users' Answers & Comments26
What is the velocity of sound at 100 oC if the velocity of sound at 0 oC is 340ms -1?
A
497m-1
B
440m-1
C
397m-1
D
240m-1
correct option: b
Users' Answers & Comments27
If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?
A
2700Hz
B
456Hz
C
444Hz
D
75Hz
28
A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?
A
0.05m
B
0.15m
C
0.30m
D
1.00m
correct option: a
\(h_i = \frac{h_o \times V}{u}\)
\(h_i = \frac{1.5 \times 0.1}{3}\)
= 0.05m
Users' Answers & Comments\(h_i = \frac{1.5 \times 0.1}{3}\)
= 0.05m
29
A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at
A
0o
B
45o
C
90o
D
180o
correct option: a
Users' Answers & Comments30
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
correct option: b
Users' Answers & Comments