2018 - JAMB Physics Past Questions and Answers - page 1

1

A man walks 1km due east and then 1 km due north His displacement

A
√2km N 45°E
B
1km N 30°E
C
1km N 15°E
D
√2km N 60°E
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2

The density of 400cm of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gm-3 after frying, assuming no loss of oil due to spilling, its new volume was?

A
1360cm\(^3\)
B
600cm\(^3\)
C
240cm\(^3\)
D
8000m\(^3\)
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3

Natural radioactivity consists of the emission of

A
α- particles and β-rays
B
α- particles and X-rays
C
α- particles, β - rays and g-rays
D
γ- rays and X-rays
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4

Which of the following is true of an electrical charge?

A
Positive charge means deficit electrons
B
Negative charge means excess of electrons
C
electric current means movement of electrons
D
All of the above
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5

Which of the following does NOT describe the Image formed by a plane minor?

A
Erect
B
Laterally inverted
C
Same distance from mirror as object
D
Magnified
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6

What is the resultant resistance of the circuit in the image shown?

 

A
8Ω
B
11Ω
C
4Ω
D
3.6Ω
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7

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

A
heat ----> Light----> Sound ----> Kinetic
B
Kinetic ----> Light ----> Heat ----> Electricity
C
heat ----> Kinetic ----> Electricity ----> Heat and Light
D
electricity ----> Kinetic ----> Heat ----> Light
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8

Cathode rays are

A
High-energy electromagnetic waves
B
protons
C
neutrons
D
streams of electrons
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9

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that

A
white light Is an electromagnetic wave
B
the prism has all the colours of the white light
C
different colours of white light travel with different speeds in glass
D
white light has undergone total Internal reflection in the prism
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10

The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

A
28.0
B
48.0N
C
233.0N
D
50.0N
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