# JAMB Physics Questions and Answers 2020/2021 [Revealed]

Last Updated on January 30, 2020 by Oyeniyi Michael Barry

Today I’ll be revealing the possible JAMB physics questions and answers 2020/2021 which will be useful for all JAMB candidates.

I’ll advice you study these questions really well and not just cram them in your head or rather over look it. Because these questions has 70% possibilities of coming out and am sure you know what that means.

Remember am not selling theses QUEATIONS so it won’t cost you anything to read and understand it rather than just ignoring and then regretting it afterwards.

I’ve also shared other subjects questions

How Much Is Jamb Form 2020/2021? See Price Of Jamb

## JAMB PHYSICS QUESTIONS & ANSWERS 2020/2021

1

The velocity ratio of an inclined plane is
2

Where must an object be placed in front of the concave mirror so that the image will formed between the centre of curvature and the focus
CORRECT ANSWER = beyond the centre
3

Optical instruments do NOT employ the principle of linear magnification in their operations rather they use
4

The force of attraction between two masses m1 and m2 separated at a distance 2r is given as
5

The condition for resonance to occur in an R-L-C serves circuit is
CORRECT ANSWER = W0 = 1/Lc
5

The condition for resonance to occur in an R-L-C serves circuit is
CORRECT ANSWER = W0 = 1/Lc
6

Calculate the work done if a force of 10N applied at an angle of 30 0 to the horizontal moves the body through a distance of 0.05m
CORRECT ANSWER = 0.25 {3 J
7

The expression for electric potential (V) is
CORRECT ANSWER = (q / 4Er)
8

The expression for electric potential (V) is
CORRECT ANSWER = (q / 4Er)
9

A solid weighs 10.5N in air and weighs 5.5N when immersed in a liquid of density 900kgm-3, calculate the volume of the solid
CORRECT ANSWER = 5.56 x 10 -4 m 3
10

A solid weighs 10.5N in air and weighs 5.5N when immersed in a liquid of density 900kgm-3, calculate the volume of the solid
CORRECT ANSWER = 5.56 x 10 -4 m 3
11

During dispersion, colours of light
CORRECT ANSWER = travel at different speeds
12

Convert 180 0F to 0C
13

the bean balance is used to measure
14

The diagram above represents four identical beaker of water with some droplet of a blue colour pigment. Which of them will have a faster rate of diffusion?
15

The diagram above represents four identical beaker of water with some droplet of a blue colour pigment. Which of them will have a faster rate of diffusion?
16

A Thick glass tumbler cracks when hot water is pour into it because of
17

The point M in the diagram above is in stable equilibrium with
CORRECT ANSWER = minimum potention energy
18

The charge stored by a 5F capacitor connected to a potential difference of 40V is
19

The dissociation of salt solution and acids into ions is known as
20

The resultant of two parallel forces acting in the same direction applied to a block of wood will be
21

From the above the induced e.m.f depends on
CORRECT ANSWER = I, II and III
22

How much current does a 120W light bulb draw when connected to a voltage of 240?
23

Fom the above diagram the effective resistance between P and Q is
24

A semi-conductor with rqual numver of holes and electron is known as
25

Which of the following is CORRECT about the motion of a simple pendulum?
CORRECT ANSWER = potention energy is maximum at the extremes
26

In the vibration of stretched strings, the frequency F and the tension T are related by
CORRECT ANSWER = f & square root T)
27

From the diagram above, the pressure acting on the trapped air is
28

Light energy E is expressed as
CORRECT ANSWER = E = hf
29

The ejection of electron from the surface of a
30

Where does refraction take place?
CORRECT ANSWER = at the boundary between
31

Ten 6V cells connected in parallel will give an effective e.m.f of
32

Vapour is said to be saturated when
CORRECT ANSWER = in a dynamic equilibrium
33

A lagged calculator is suitable for measuring heat energy because it
CORRECT ANSWER = prevents heat loss and gain
34

A wire carries a current of 3.0A with a magnetic field 2.0T at an angle of 30 0. calculate the force on a segment of wire 0.5m
35

Which method of heat transfer is electro-mamgnetic in nature?
36

A light of 6.22eV is incident on a cadmium surface. If a stopping voltage of 2.15eV is required to reduce the photocurrent to zero, calculate the work function of cadmium
37

From the digram above, calculate F
38

Which of the folowing exhibits a wave motion?
CORRECT ANSWER = a plucked stretched s tring
39

A stone weighs W1 Newton in air W2 Newton in water. The relative density of the stone is
40

Why do pressure pots cook food faster than other conventional pots?
CORRECT ANSWER = its higher pressure
41

A spring of length 0.06m is acted upon by a force of 2N creating an extension of 0.02m. What would be the length when the applied force is increased by 8N?
42

When a bar magnet is suspended freely in the earth’s magnetic field, it will point to
CORRECT ANSWER = north – south direction
43

The point where a ball moving in a viscous liquid start to move with uniform velocity is

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### How do I pass jamb 2020/2020 physics

4. Explore Both Sides of an Argument. …
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