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154 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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154 questions

Question 1 of 20 154 total questions

Question 21

waec 2025

A body weighing 10N in air is partially immersed in water. It displaces water of mass 0.3kg. What is the upthrust on the body?(g = 10m/s\(^2\))

A7.0N

B13.0N

C3.3N

D3.0N

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Question 22

waec 2025

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30N with a force of 20N. Calculate its mechanical advantage.

A1.5

B0.9

C0.7

D2.5

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Question 23

waec 2025

A car travelling at a uniform speed of 120km/hr passes two stations in 4minutes. Calculate the distance between the two stations.

A15km

B30km

C8km

D22km

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Question 24

waec 2025

Which of the following will reduce the frequency of oscillation of a simple pendulum?

AIncreasing the mass of the bob

BDecreasing the length of the string

CIncreasing the length of the string

DDecreasing the mass of the bob.

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Question 25

waec 2025

At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain maximum horizontal range of the bullets?

A0.0º.

B30.0º.

C45.0º

D22.5º

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Question 26

waec 2025

The angular speed of an object describes a circle of radius 4m with linear constant speed of 10m/s is

A2.50 rads\(^{-1}\)

B1.58 rads\(^{-1}\)

C14.00 rads\(^{-1}\)

D40.00 rads\(^{-1}\)

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Question 27

waec 2025

A body of mass 7.5 kg is to be pulled along a plane which is inclined at 30º to the horizontal. If the efficiency of the plane is 75%, what is the minimum force required to pull the body up the plane?

A20.0N

B50.0N

C75.0N

D5.0N

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Question 28

waec 2025

A student found out from a simple pendulum experiment that 20 oscillations were completed in 38 seconds.

A8.0s

B3.8s

C1.9s

D2.0s

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Question 29

waec 2025

A boy cycles continuously through a distance of 1.0km in 5 minutes. Calculate his average speed.

A0.3m/s

B16.6m/s

C20.0m/s

D3.3m/s

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Question 30

waec 2025

Which of the following is a fundamental quantity?

ATorque

BReactance

CHeat capacity

DElectric current

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Question 31

jamb 2025

Which light source operates primarily based on stimulated emission of radiation?

Alaser

Bfluorescent lamp

Cled

Dincandescent bulb

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Question 32

jamb 2025

A block with an initial speed of 10 m/s slides on a horizontal surface and comes to rest after traveling a distance of 25 m. What is the coefficient of kinetic friction between the block and the surface? (Take g = 9.8 m/s\(^2\)).

A0.1

B0.3

C0.2

D0.5

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Question 33

jamb 2025

When a spiral spring is compressed by an external force of 200 N, it stores 0.16 J of energy. What amount of energy will it store when compressed by an external force of 700 N?

A1.12J

B0.48J

C1.96J

DO.84J

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Question 34

jamb 2025

The electrical power developed in the resistor above is

A8W

B64W

C128W

D256W

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Question 35

jamb 2025

A method of demagnetization is

Aplacing the magnetic bar in a solenoid

Bdouble-stroking the magnet with soft in n-s direction

Cheating a magnetic bar red hot and allowed to cool e-w direction

Dhammering the magnetic bar repeatedly in n-s direction

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Question 36

jamb 2025

Water waves and light waves differ generally in their

Aability to be diffracted

Bability to be reflected

Cdirection of vibration

Dmedium of propagation

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Question 37

jamb 2025

Given that SQ = 10cm and SR = 6cm, the refractive index of the block of glass shown in the above figure is

A1.67

B0.60

C0.30

D2.33

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Question 38

jamb 2025

Assuming E\(_1\), E\(_2\), and E\(_3\), are equal, then the total e.m.f of the arrangement will be given by

A\(\frac{1}{\text{E}}\) = (\(\frac{1}{E_1}\) +\(\frac{1}{E_2}\)) + E\(_3\)

BE = \(E_1\) + \(E_2\) + \(E_3\)

C\(\frac{1}{\text{E}}\) = \(\frac{1}{E_1}\) + \(\frac{1}{E_2}\) + \(\frac{1}{E_3}\)

DE = \(E_1\) = \(E_2\) = \(E_3\)

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Question 39

jamb 2025

From the above graph, what is the distance covered in the last stage of the motion?

A56m

B24m

C140m

D46m

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Question 40

jamb 2025

If the length of a simple pendulum is 120cm, calculate its frequency [\(\pi\) = \(\frac{22}{7}\) g = 10ms\(^{-2}\)]

A2.8Hz

B1.2Hz

C12Hz

D0.5Hz

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