⚛️ 1989

JAMB Physics 1989 past questions

27 questions from the 1989 JAMB UTME Physics paper. Free, with answers where available.

Practice with CBT mock → All Physics years
Physics JAMB 1989 Q10 ✓ Answer: D
In the figure above, W1 = 200g and W2 = 450g. Calculate the extension of the spring per unit load. [g = 10m s-2]
A
6.0 x 10-5m N-1
B
2.5 x 10-4m N-1
C
6.0 x 10-4m N-1
D
2.5 x 10-2m N-1
Physics JAMB 1989 Q11 ✓ Answer: D
Which of the following devices are used to measure pressure? I Aneroid barometer II Hydrometer III Hygrometer IV Manometer.
A
I and III
B
II and III
C
III and IV
D
I and IV.
Physics JAMB 1989 Q13 ✓ Answer: B
The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury.
A
30k
B
243k
C
300k
D
303k
Physics JAMB 1989 Q16 ✓ Answer: C
An electric heater is used to melt a block of ice, mass 1.5kg. If the heater is powered by a 12V battery and a current of 20A flows through the coil, calculate the time taken to met the block of ice at 00C. (Specific latent heat of fusion of ice = 336 x 103J kg-1).
A
76.0 min
B
35.0 min
C
21.0 min
D
2.9 min.
Physics JAMB 1989 Q17 ✓ Answer: B
From the kinetic theory of gases, temperature is a
A
Form of energy and is proportional to the total kinetic energy of the molecules.
B
Form of energy and is proportional to the average kinetic energy of the molecules.
C
Physical property and is proportional to the total kinetic energy of the molecules.
D
Physical property and is proportional to the average energy of the molecules.
Physics JAMB 1989 Q20 ✓ Answer: B
The air column as shown in the figure above is set into vibration by the turning fork. In this state of resonance, the waves in the air column will be
A
Stationary and transverse
B
Stationary and longitudinal
C
Progressive and transverse
D
Progressive and longitudinal.
Physics JAMB 1989 Q22 ✓ Answer: C
In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms-1, determine the frequency.
A
10 Hz
B
20 Hz
C
1 000 Hz
D
5 780 Hz
Physics JAMB 1989 Q24 ✓ Answer: A
Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108m s-1. What is its wavelength in glass of refractive index 1.5?
A
3 333 x 10-8cm
B
5 000 x 10-8cm
C
6 666 x 10-8cm
D
7 500 x 10-8cm
Physics JAMB 1989 Q25 ✓ Answer: C
An object is placed 5.6 x 10-4m in front of a converging lens of focal length 1.0 x 10-8m. The image formed is
A
Real, erect and magnified
B
Virtual, erect and magnified
C
Real, inverted and magnified
D
Virtual, erect and diminished.
Physics JAMB 1989 Q26 ✓ Answer: D
The magnification of the image of an object placed in front of a convex mirror is 1/3. If the radius of curvature of the mirror is 24cm, what is the distance between the object and its image?
A
8 cm
B
16 cm
C
24 cm
D
32 cm
Physics JAMB 1989 Q27 ✓ Answer: A
The plane mirrors in a kaleidoscope are usually placed
A
At an angle of 600
B
Parallel to one another
C
Perpendicular to one another
D
At n angle of 450
Physics JAMB 1989 Q29 ✓ Answer: A
When a yellow card is observed through a blues glass, the cord would appear
A
Black
B
Green
C
Red
D
White
Physics JAMB 1989 Q30 ✓ Answer: B
Dispersion of light by a glass prism is due to the
A
Different hidden colours of the glass
B
Different speeds of the various colours in glass
C
Defects in the glass
D
High density of glass.
Physics JAMB 1989 Q31 ✓ Answer: D
Which of the following pairs is NOT part of the electromagnetic spectrum? I Radio waves II Beta rays III Gamma rays IV Alpha rays
A
I and II
B
III and IV
C
I and III
D
II and IV.
Physics JAMB 1989 Q32 ✓ Answer: B
Two insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor. Current will flow from one sphere to the other until both spheres [PAGE 36]
A
Carry the same magnitude and sign of charge.
B
Are at the same potential.
C
Are at the same temperature.
D
Are of the same size.
Physics JAMB 1989 Q33 ✓ Answer: A
When a number of identical small magnets are arranged in a line, the strength of the resultant magnet
A
Is largest when they are arranged end to end
B
Is greatest when they are arranged parallel with like poles adjacent to each other.
C
Depends only on the number of magnets provided they are parallel.
D
Is greater when the magnets are arranged on a wooden surface than on a metal surface.
Physics JAMB 1989 Q35 ✓ Answer: D
The resistance of a 5m uniform wire of cross- sectional area 0.2 x 10-6m2 is 0.425. What is the resistivity of the material of the wire?
A
1.10 x 10-6 Ohms m
B
4.25 x 10-6 Ohms m
C
2.40 x 10-7 Ohms m
D
1.70 x 10-8 Ohms m
Physics JAMB 1989 Q36 ✓ Answer: B
Three resistors, with substances 250Ohms 500Ohms and 1 kOhms are connected in series. A 6V battery is connected to either end of the combination. Calculate the potential difference between the ends of the 250Ohms resistor.
A
0.20V
B
0.86V
C
1.71V
D
3.43V.
Physics JAMB 1989 Q38 ✓ Answer: B
In the above circuit diagrams, A is the ammeter and V the voltmeter. Which of the circuits is correct for finding the value of the resistance R?
A
I
B
II
C
III
D
IV.
Physics JAMB 1989 Q39 ✓ Answer: B
Three 2 – u F capacitors are arranged as shown in the above circuit. The effective capacitance between E and F is
A
0.75 uF
B
1.33 uF
C
3.00 uF
D
6.00 uF
Physics JAMB 1989 Q40 ✓ Answer: B
The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the
A
Temperature of the refrigerator low and constant.
B
Current supplied to the refrigerator below 5A.
C
Voltage supply constant
D
Current supplies to the refrigerator constant and above 5A. [PAGE 37]
Physics JAMB 1989 Q41 ✓ Answer: D
The total power drawn from the cell in the circuit diagram above is
A
12W
B
24W
C
32W
D
40W
Physics JAMB 1989 Q43 ✓ Answer: B
An ammeter of resistance 0.1 ohms has a full- scale deflection of 50 mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111Ohms is connected across its terminals.
A
400 mA
B
450 mA
C
500 mA
D
550 mA.
Physics JAMB 1989 Q44 ✓ Answer: C
The electrochemical equivalent of silver is 0.0012g/
A
6 000 A
B
100 A
C
If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0 minutes, the current must be
D
1 A
Physics JAMB 1989 Q45 ✓ Answer: C
The figure above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth’s magnetic field, the compass needle will
A
Settle in any direction
B
Settle in a fixed direction only if conductor PQ is a magnetic material
C
Settle in a fixed direction whether conductor PQ is a magnetic material or not
D
Be stationary.
Physics JAMB 1989 Q47 ✓ Answer: C
When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depends on the
A
Intensity of the radiation
B
Source of the radiation
C
Wavelength of the radiation
D
Detection device for the electron.
Physics JAMB 1989 Q48 ✓ Answer: D
Which of the following is TRUE of the particles emitted in radioactive disintegration?
A
The alpha particle is the helium nucleus 2H
B
The alpha particle is lighter than the beta particle
C
The alpha particle is deflected more than the beta particle in a magnetic field
D
The beta particle is deflected more than alpha particle in a magnetic field.