JAMB Physics 1988 Past Questions and Answers

Physics JAMB 1988 Q1 ✓ Answer: B

Which of the following is a set of vectors?

A

Force, mass and moment

B

Acceleration, velocity and moment

C

Mass, weight and density

D

Mass, volume and density

Physics JAMB 1988 Q2 ✓ Answer: D

Which of the following are the correct SI units of the quantities indicated? I N (Force) II. Nm-1 (Torque) III Watt (power) IV kg ms-2 (Momentum).

A

I and II only

B

I. II and III only

C

I, II and IV only

D

I and III only.

Physics JAMB 1988 Q2 ✓ Answer: C

The magnitude of the resultant of two mutually perpendicular forces, F1 and F2 is 13N. If the magnitude of F1 is 5N, what is the magnitude of F2?

A

2.6 N

B

8.0 N

C

12.0 N

D

18.0 N

Physics JAMB 1988 Q3 ✓ Answer: B

Two points on a velocity-time graph have co- ordinates (5s, 10m s-1) and (20s, 20m s-1). Calculate the mean acceleration n between the two points.

A

0.67m s-1

B

0.83m s-2

C

1.50m s-2

D

2.00m s-2

Physics JAMB 1988 Q4 ✓ Answer: D

Two forces whose resultant is 100N, are at right angles to each other. If one of them makes an angle of 300 with the resultant, determine its magnitude.

A

8.66 N

B

50.0 N

C

57.7 N

D

86.6 N

Physics JAMB 1988 Q5 ✓ Answer: D

Which of the following quantities are scalars? I Electrical potential II Torque III Momentum IV Kinetic energy

A

II and III only

B

I and Ii only

C

III and Iv only

D

I and Iv only.

Physics JAMB 1988 Q7 ✓ Answer: C

When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. If the mass of the ball is 0.075kg, calculate the speed with which the ball moves off.

A

4.50m s-1

B

11.25m s-1

C

20.00m s-1

D

45.00m s-1

Physics JAMB 1988 Q8 ✓ Answer: B

A 20-toothed gear wheel drives a 60-toothed one, if the angular speed of the smaller wheel is 120 rev s-1, the angular speed of the wheel is

A

3 rev s-1

B

40 rev s-1

C

360 rev s –1

D

2 400 rev s-1

Physics JAMB 1988 Q9 ✓ Answer: C

x(m) f(s) The figure above show the displacement – time graphs for three different motions. Which of the following statements is correct?

A

Graph 2 corresponds to the highest velocity

B

Graph 1 corresponds to zero velocity

C

Graph 3 corresponds to a particle moving in the negative x direction.

D

Graph 2 corresponds to a particle moving in the positive x directions.

Physics JAMB 1988 Q10 ✓ Answer: C

x z [PAGE 29] The figures above show three different ways of hanging a heavy picture from a hook. The tension in the string would be

A

Greatest in X

B

Greatest in Y

C

Greatest in Z

D

Same in each one.

Physics JAMB 1988 Q11 ✓ Answer: D

How long will it take a 60kg man to climb a height of 22m if he expended energy at the rate of 0.25kW?

A

5.3s

B

34.5s

C

41.6s

D

52.8s [g = I0ms-2]

Physics JAMB 1988 Q15 ✓ Answer: C

diagram 13.4cm To gas supply 3.5cm When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube are as shown in the diagram above. If the atmospheric pressure is 76.0cm Hg, the gas pressure is

A

62.6cm Hg

B

72.5cm Hg

C

79.5cm Hg

D

85.9cm hg

Physics JAMB 1988 Q16 ✓ Answer: C

The product PV where P is pressure and V is volume has the same unit as

A

Force

B

Power

C

Energy

D

Acceleration

Physics JAMB 1988 Q17 ✓ Answer: B

The amount of heat needed to raise the temperature of 10kg of copper by1K is its

A

Specific heat capacity

B

Heat capacity

C

Latent heat

D

Internal heat.

Physics JAMB 1988 Q20 ✓ Answer: C

When heat is applied to one end of a metal rod, the molecules at the other end soon begin to vibrate with greater amplitude than before because heat has been transfer by

A

Radiation

B

Convection

C

Conduction

D

Evaporation.

Physics JAMB 1988 Q21 ✓ Answer: D

Which of the following media allow the transmission of sound waves through them? I Air II Liquids III Solids

A

I and II only

B

I and III only

C

II and III only

D

I, II and III.

Physics JAMB 1988 Q22 ✓ Answer: C

X Y The diagram above shows two waveforms X and Y. If the frequency is 30 HZ, what is the frequency of Y?

A

12 Hz

B

19 Hz

C

60 Hz

D

75 Hz

Physics JAMB 1988 Q23 ✓ Answer: D

Which of the following properties is/are common to all waves? I Diffraction II refraction III Interference

A

I only

B

III only

C

I and III only

D

I, II and III.

Physics JAMB 1988 Q26 ✓ Answer: A

Which of the following factors affects the speed of sound in air? I Temperature II Pressure III Frequency.

A

I only

B

II only

C

I and II only

D

II and III only.

Physics JAMB 1988 Q27 ✓ Answer: D

The speed of sound in air at sea-level is 340m s-1 while that of light is 300,000km s-1. How far (to the nearest metre) from the center of thunderstorm is an observer who hears a thunder 2s after a lightning flash?

A

170m

B

340m

C

600m

D

680m.

Physics JAMB 1988 Q29 ✓ Answer: D

Two strings of the same length and under the same tension give notes of frequencies in the ratio 4 : 1. The masses of the strings are in the corresponding ratio of

A

2 : 1

B

1 : 2

C

1 ; 4

D

1 : 16

Physics JAMB 1988 Q30 ✓ Answer: A

To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?

A

0.13m

B

0.25m

C

0.28m

D

0.50m

Physics JAMB 1988 Q32 ✓ Answer: A

An object is place 10 cm in front of a concave mirror of focal length 15cm. What is the positive and nature of the image formed?

A

30cm and virtual

B

6cm and real

C

6cm and virtual

D

30cm and real.

Physics JAMB 1988 Q33 ✓ Answer: A

Which of the following phenomena explain the formation of a mirage I Reflection III Refraction III Diffraction

A

I and II only

B

II and III only

C

I and III only

D

I, II and III.

Physics JAMB 1988 Q34 ✓ Answer: C

When white light is dispersed by a spectrometer, the component having the shortest wavelength is

A

Orange

B

Green

C

Violet

D

Red.

Physics JAMB 1988 Q35 ✓ Answer: B

Which of the following statements is TRUE of ultra- violet, visible and infra-red rays?

A

They are all electromagnetic waves with the same wavelength.

B

Ultra-violet rays have shorter wvelenghts than infra-red rays and produce fluorescence.

C

Infra-red rays have shorter wavelength than visible light and produce the sensation of heat.

D

The wavelengths increase in the sequence: visible, ultra-violet, infra-red. White

Physics JAMB 1988 Q36 ✓ Answer: C

object E F G E, F and G are yellow, red and cyan transparent light filters respectively. The colour of a white opaque object when viewed through the arrangement of the filters above is

A

Yellow

B

Red

C

Black

D

Blue

Physics JAMB 1988 Q40 ✓ Answer: B

When a resistance R is across a cell, the voltage across the terminals of the cell is reduced to two- thirds of its nominal value. The internal resistance of the cell is

A

1 R

B

1 R

C

2 R

E

R [PAGE 32]

Physics JAMB 1988 Q44 ✓ Answer: A

Which of the following instruments consumes the highest current? Voltage Power Instrument Rating Rating

A

Electric iron 250V 1kW

B

Television set 220V 110W

C

Torch light 6V 30W

D

Immersion heater 110V 500W

Physics JAMB 1988 Q45 ✓ Answer: B

Which of the following ammeters may be used to measures alternating current? I Moving-coil ammeter II Moving-iron ammeter III Hot-wire ammeter.

A

I and II only

B

II and III only

C

I and III only

D

I, II and III.

Physics JAMB 1988 Q46 ✓ Answer: C

The principle of operation of an induction coil is based on

A

Ohm’s law

B

Ampere’s law

C

Faraday’s law

D

Coulomb’s law.

Physics JAMB 1988 Q49 ✓ Answer: D

Which of the following symbolic representations is correct for an atom X with 22 electrons and 43 neutrons?

A

2X

B

3X

C

2X

D

2X

JAMB Physics 1988 past questions