# Jamb Physics questions and answers 2022/2023

## Sample JAMB Physics Questions

1. A satellite is in a parking orbit if its period is

A. More than the period of the earth

B. Equal to the period of the earth

C. The square of the period of the earth

D. Less than the period of the earth

2. What does not drop through an open umbrella of silk material unless the inside of the umbrella is touched

A. Osmotic pressure

B. Capillarity

C. Surface tension

D. Viscosity

3. A bead traveling on a straight wire is brought to rest at 0.2m by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction

A. 2 x 10-3J

B. 2 x 102J

C. 2 x 10-4J

D. 2 x 101J [g= 10ms-2]

4. The stylus of a phonograph record exerts a force of 77. x 10-2N on a groove of radius 10-5m. Compute the pressure exerted by the stylus on the groove.

A. 2.42 x 109 Nm-2

B. 4.90 x 108Nm-2

C. 2.45 x 108Nm-2

D. 3.45 x 108Nm-2

5. A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction.

A. Tangential to the circular path

B. Perpendicular to the circular path

C. Towards the centre of the circle

D. Parallel to the circular path.

6. A test tube of radius 1.0cm is loaded to 8.8g. If it is placed upright in water, find the depth to which it would sink.

A. 25.2 cm

B. 2.8 cm

C. 28.0 cm

D. 5.2 cm [g = 10ms-2 density of water 1 000kgm-3].

7. A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the centre of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is

A. 20 N

B. 30 N

C. 60 N

D. 15 N

8. On top of a spiral spring of force constant 500 Nm-1 is placed a mass of 5 x 10-3kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected

A. 2 m

B. 8 m

C. 1 m

D. 4 m

9. A hose of cross-sectional area 0.5m2 is used to discharge water from a water thank at a velocity of 60ms-1 in 20s into a container. If the container is filled completely, the volume of the container is

A. 600 m3

B. 6 000 m3

C. 240 m3

D. 2 400 m3

10. A force of 100N is used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked.

A. 100ms-1

B. 32ms-1

C. 50ms-1

C. 64ms-1

JAMB PHYSICS QUESTIONS TODAY.

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)

7 :- the expression for electric potential (V) is

CORRECT ANSWER = (q / 4Er)

8 :- 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

8 :- 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

9 :- during dispersion, colours of light

CORRECT ANSWER = travel at different speeds

10 :- cobvert 180 0F to 0C

11 :- the bean balance is used to measure

12 :- 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?

12 :- 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?

13 :- a thick glass tumbler cracks when hot water is pour into it because of

14 :- the point M in the diagram above is in stable equilibrium with

CORRECT ANSWER = minimum potention energy

15 :- the charge stored by a 5F capacitor connected to a potential difference of 40V is

16 :- the dissociation of salt solution and acids into ions is known as

17 :- the resultant of two parallel forces acting in the same direction applied to a block of wood will be

18 :- from the above the induced e.m.f depends on

CORRECT ANSWER = I, II and III

19 :- how much current does a 120W light bulb draw when connected to a voltage of 240?

20 :- from the above diagram the effective resistance between P and Q is

21 :- a semi-conductor with rqual numver of holes and electron is known as

22 :- which of the following is CORRECT about the motion of a simple pendulum?

CORRECT ANSWER = potention energy is maximum at the extremes

23 :- in the vibration of stretched strings, the frequency F and the tension T are related by

CORRECT ANSWER = f & square root T)

24 :- from the diagram above, the pressure acting on the trapped air is

25 :- light energy E is expressed as

CORRECT ANSWER = E = hf

26 :- the ejection of electron from the surface of a

27 :- where does refraction take place?

CORRECT ANSWER = at the boundary between

28 :- ten 6V cells connected in parallel will give an effective e.m.f of

29 :- vavpour is said to be saturated when

CORRECT ANSWER = in a dynamic equilibrium

30 :- a lagged calculator is suitable for measuring heat energy because it

CORRECT ANSWER = prevents heat loss and gain

31 :- 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

32 :- which method of heat transfer is electro-mamgnetic in nature?

33 :- 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

34 :- from the digram above, calculate F

35 :- which of the folowing exhibits a wave motion?

CORRECT ANSWER = a plucked stretched s tring

36 :- a stone weighs W1 Newton in air W2 Newton in water. The relative density of the stone is

37 :- why do pressure pots cook food faster than other conventional pots?

CORRECT ANSWER = its higher pressure

38 :- 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?

39 :- when a bar magnet is suspended freely in the earth’s magnetic field, it will point to

CORRECT ANSWER = north – south direction

40 :- the point where a ball moving in a viscous liquid start to move with uniform velocity is

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