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141 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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141 questions

Question 1 of 20 141 total questions

Question 41

waec 2001

Which of the following statements about elastic collision is correct?

Amomentum is lost due to the sound produced

Bloss of momentim is equal to loss in kinetic energy

Cboth kinetic energy and momentum are conserved

Dkinetic energy is lost while momentum is conserved

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Question 42

waec 2001

The time rate of change of momentum is

Aimpulse

Bforce

Cpower

Dpressure

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Question 43

waec 2001

The amplitude of a particle executing simple harmonic motion in 5cm while its angular frequency is 10 rad s^-1. calculate the magnitude of the maximum acceleration of the particle

A0.25ms^-2

B0.50ms^-2

C2.00ms^-2

D5.00ms^-2

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Question 44

waec 2001

The amplitude of the motion of a body performing simple harmonic motion decreases with time because

Afriction force dissipate the energy of motion

Bthe frequency of oscillation varies with time

Cthe period of oscillation varies with time

Denergy is supplied by some external agency

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Question 45

waec 2001

Which of the following equations represents the distance x, travelled by a body moving on a straight road with a constant speed? [The other symbol have their usual meanings]

Ax = Ut + \(\frac{1}{2}t^2\)

Bx = Ut

Cx = \(\frac{V^2 - U^2}{2a}\)

Dx = -\(\frac{1}{2} at^2\)

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Question 46

waec 2001

A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the friction force on the block

A0.3N

B0.5N

C3.0N

D5.0N

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Question 47

waec 2001

The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm^-3, g = 10ms^-2]

A8.9 x 10^-3m³

B6.4 x 10^-3m³

C3.2 x 10^-3m³

D3.0 x 10^-3m³

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Question 48

waec 2001

Which of the following statements about pressure is not correct? pressure

Aincreases with an increase in surface area

Bdecreases with an increase in surface area

Cincreases with a decrease in surface area

Dincreases with an increase in the applied force

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Question 49

waec 2001

An object weight 10N immersed in a liquid displaces a quantity of the liquid. If the liquid displaced weighs 6N, determine the upthrust of the object

A20N

B10N

C6N

D4N

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Question 50

waec 2001

A spring balance,which is suspended from the roof of a lift, carries a mass of 1kg at its free end. If the lift accelerates upwards at 2.5ms^-2, determine the reading on the spring balance. [g = 10ms^-2]

A24.0N

B12.5N

C7.5N

D4.0N

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Question 51

waec 2001

Which of the following physical processes cannot be explained by the molecular theory of matter?

Aevaporation

Bthermal conduction

Cradiation of heat

Dconvectional current of fliuds

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Question 52

jamb 2001

Which of the following graphs correctly represents the variation of mass of a given material deposited with time for constant current in Faraday's Law of Electrolysis?

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Question 53

jamb 2001

What is the angle of dip at the magnetic equator

A\( 45^{\circ} \)

B\( 0^{\circ} \)

C\( 90^{\circ} \)

D\( 180^{\circ} \)

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Question 54

jamb 2001

A bread toaster uses a current of 4A when plugged in a 240V line. it takes 1 minute to toast slices of bread. what is the energy consumed by the toaster

A5.76 x 10⁴J

B1.60 x 10⁴J

C3.60 x 10³J

D1.60 x 10²J

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Question 55

jamb 2001

Find the frequencies of the first three harmonics of a piano string of length 1.5m, if the velocity of the wave on the string is 120ms-1

A40Hz, 80Hz, 120Hz

B80Hz, 160Hz, 240Hz

C180Hz, 360Hz, 540Hz

D369Hz, 180Hz, 90Hz

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Question 56

jamb 2001

In the diagram above, determine the r.m.s current

A31A

B48A

C60A

D80A

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Question 57

jamb 2001

In the circuit diagram above , the ammeter reads a current of 3A when R is 5Ω and 6A when R is 2Ω. Determine the value of x

A8Ω

B2Ω

C10Ω

D4Ω

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Question 58

jamb 2001

The diagram above shows a closed side 0.5m in a uniform electric field E in the direction shown by the arrows. What is the flux Φ for the box?

A0.5 E

B2.0 E

C0.2 E

D0.0 E

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Question 59

jamb 2001

The diagram above shows the capacitors C\(_1\), C\(_2\) and C\(_3\) 2μF, 6μF and 3μF respectively. The potential difference across C\(_1\), C\(_2\) and C\(_3\) respectively are

A4V, 6V and 2V

B2V, 6V and 4V

C6V, 4V and 2V

D6V, 2V and 4V

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Question 60

jamb 2001

The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively connected to a d.c source. The ratio of energy stored in P to Q is

A4:1

B2:1

C1:4

D1:2

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