Physics JAMB MOCK TEST - Undergragra Nigeria

Created on April 24, 2023 By

Ace/Undergragra

JAMB MOCK TEST PHYSICS

1 / 40

In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most

A

B

C

E

2 / 40

The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is

yield point

proportionality point

deformation point

elastic point

3 / 40

The resultant capacitance in the figure shown is

0.4μf

0.8μf

1.8μf

4.5μf

4 / 40

The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.
What is the true temperature when the thermometer reads 51°C?

52°C

50°C

49°C

46°C

5 / 40

If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

circular

oscillatory

rectilinear

Rotational

6 / 40

The process by which protons are converted into helium atoms with a tremendous release of energy is called?

thermionic emission

nuclear fission

thermonuclear fusion

photoelectric emission

7 / 40

The volume of 0.354g of helium at 273°C and 114cm of mercury pressure is 2667cm3. Calculate the volume

2000.25 cm^3

200.025 cm^3

4003.27 cm^3

2010.25 cm^3

8 / 40

When two objects A and B are supplied with the same quantity of heat, the temperature change in A is obtained to be twice that of B. The mass of P is half that of Q. The ratio of the specific heat capacity of A to B is

1 : 4

4 : 1

1 : 1

2 : 1

9 / 40

The following are some units
I. Ns
II. Non
III. Nm−2
IV. J°K−1
V. JKj−1
What are the units of latent heat?

I

II

III

V

10 / 40

A boy pushes a 500kg box along a floor with a force of 2000N. If the velocity of the box is uniform, the co-efficient of friction between the box and the floor is

1

0.8

0.65

0.4

11 / 40

Which of the following is an essential physical property of the wires uses for making fuses ?

Low density

Hypothermal conductivity

Low electrical resistivity

Low melting point

12 / 40

A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally

60V

150V

225V

360V

13 / 40

Mercury which is spilled onto a glass surface forms ball-like shapes because____.

Mercury is a metal

The cohesive force between its molecules is greater than the adhesive force between mercury and glass molecules

The cohesive force between its molecules is less than the adhesive force between mercury and glass molecules

The viscosity of mercury is height

14 / 40

Water of mass 150g at 60oc is added to 300g of water at 20oc and the mixture is well stirred. Calculate the temperature of the mixture.(neglect heat losses to the surroundings)

33 o c

40 o c

25 o c

10 o c

15 / 40

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.

Translational Motion

Rotational Motion

Brownian Motion

Oscillatory Motion

16 / 40

The resultant force of a couple is ………?

Infinity

Zero

One

Half

17 / 40

A vector quantity can only be completely described when ……… and …………are mentioned.

Magnitude and motion

Magnitude and direction

Distance and specified displacement

Moment and momentum

18 / 40

A car traveled at a uniform speed of 100km/h, spends 15m moving from point A to point B along its route. The distance between A and B is

50km

25km

15km

10km

19 / 40

A solid cube of side 50cm and mass 75kg floats in a liquid with 13 of its height above the liquid surface. The relative density of the liquid is?

0.33

0.50

0.67

0.90

20 / 40

A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

3330m

335.4m

660m

670.8m

21 / 40

In an elastic collision

I. Energy is conversed
II. Energy is decreased
III. Energy is increased
IV. Linear momentum conversed

I

II and IV

II

III

22 / 40

Body floats in fluid when its …………………

Displaces its own volume of the liquid (fluid)

B Displaces its own mass of the fluid

Displace its own density of the fluid

Is no longer subjected to gravity

23 / 40

The general gas law can be written as

PV ÷ T = a constant

PV = a constant

p/T = a constant

v/t = a constant

24 / 40

A motor boy of a driver saw what seem to appear to be a pool of water a head of him, while his driver’s drives a new truck on a funny day. Which of the following explains his observation?

He saw a flying object

B He must be thinking of water and food

C He was seeing the shadow of the car

D The sun ray from the sky were passing from a hot air (layer) to cold layer

25 / 40

Which of the following is not luminous object?

Sun

Moon

Candle

Star

26 / 40

According to kinetic molecular model in gases,

the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern

the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them

the molecules are very far apart and occupy all the spaces made available to them

the particles occur in clusters with molecules slightly further apart

27 / 40

A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration.

3.20 ms^-2

0.25 ms^-2

0.8 ms^-2

4 ms^-2

28 / 40

The direction of the path taken by light is called

Locus

Lines

Ray

Beam

29 / 40

What is the inductance (L) of an inductor whose reactance is 1Ω at 50/ π hertz (H)?

100 H

0.01H

1H

10H

30 / 40

A stroboscope can be used to make the wave appear …………..

Stationary

In motion

Dipper

Ripple

31 / 40

If a bar magnet is divided into two pieces, which of the following statement is correct?

two new magnets are created

the magnetic field of each separate piece becomes stronger

the electric field is created

the bar magnet is demagnetized

32 / 40

Which of the following is a derived unit?

Kilogram

Metre

Newton

Second

33 / 40

The most suitable instrument to view the sun is ___

Helioscope

Telescope

Stroboscope

Sun meter

34 / 40

Which of the following liquid is a poor conductor of electricity?

Distilled water

Tap water

Sea water

Drinking water

35 / 40

A reservoir is filled with liquid of density 2000 kgm−1. Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm−2 (g = 10 ms−2)

0.262m

0.664m

0.818m

0.455m

36 / 40

Why do tyres have treads?

increase weight of tyres

increase friction

increase its longevity

look good

37 / 40

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

the magnet is moved towards the stationary solenoid

there is no relative motion

the magnet is moved away from the stationary solenoid

the solenoid is moved away from the stationary magnet

38 / 40

Consider the wave equation y = 5mm sin [1cm−1x - 60s−1t]. The wave number is?

0.1 cm^-1

10cm^-1

1.0 cm^-1

2 cm^-1

39 / 40

The diagram shows a uniform meter rule AB which balances horizontally at the 90cm mark when a mass of 0.2kg is suspended from B. Calculate the mass of the meter rule

0.05kg

0.20kg

0.80kg

1.00kg

40 / 40

The earth's gravitational field intensity at its surface is about
(G = 6.7 × 10−11Nm2/kg2, mass of the earth is 6 × 1024kg, radius of the earth is 6.4 × 106m, g on the earth = 9.8m/s2)

6.7N/kg

7.9N/kg

8.0N/kg

9.8N/kg

Your score is

The average score is 23%