Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 2016 Heat Energy & Temperature

Which of the following statements is Not true about atoms?

A

Atom of different elements have different atomic weights

B

The mass of an atom is concentrated in the nucleus

C

An atom is made up of a nucleus and number of electrons

D

Atoms of all elements are identical

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

The diagram given, represents the graph of stress against strain for an elastic wire. The point Q on the graph is the

Attached Figure / Diagram

A

elastic linit

B

breaking point

C

yield point

D

proportional limit

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Which of the following substances lowers the surface tension of water?

A

metal

B

sand

C

detergent

D

paper

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

The mouth piece of a telephone handset converts

A

electrical energy to sound energy

B

sound energy to electrical energy

C

sound energy to radiowave

D

radiowave to sound energy

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots out of the bottle at an angle of 40o to the horizontal and travels a horizontal distance of 4.50m in 1.25s. Calculate the initial speed of the cork.

A

4.2ms-1

B

4.7ms-1

C

5.6ms-1

D

7.1ms-1

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

A uniform metre rule is balanced on a fulcrum placed at the 35cm mark by suspending a mass of 120g at the 10cm mark. Calculate the mass of the metre rule.

A

60g

B

80g

C

120g

D

200g

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

A plank is placed along the path on which a wheel barrow containing sand is pushed at a construction site to prevent it from sticking as illustrated in the diagram given. The large area of the plank prevents the wheel barrow from getting stuck by

Attached Figure / Diagram

A

increasing the reaction on the ground

B

increasing the pressure on the ground

C

decreasing the pressure on the ground

D

decreasing the weight on the ground

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures

A

continuous dissipation of heat to the room

B

uniform distribution of thermal energy to all parts of the mixture

C

that the thermal energy is confined to the mixture

D

that there is rapid heat exchange

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Which of the following statements is correct about the effect of dissolved salt on the freezing point of water?

A

the freezing point is lowered

B

the freezing point is increased

C

there is no change in the freezing point

D

the change in the freezing point depends on the temperature of the surrounding

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They

A

expand

B

collide less often

C

move more rapidly

D

contract

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Complementary colours are those which

A

have the same refractive index

B

have the same wavelength

C

add-up to produce black light

D

add-up to produce white light

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Which of the following factors does not affect the e.m.f of a primary cell? Its

A

size

B

internal resistance

C

operating temperature

D

duration of usage

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagram given. The correct polarity at P and Q respectively

Attached Figure / Diagram

A

S and N

B

N and N

C

S and S

D

N and S

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

In storing magnets, keepers are used to

A

reduced self-demagnetization

B

cancel the effect of the earth's magnetic field

C

protect the magnet from stray electric field

D

increase the strangth of the magnets

medium Difficulty

Physics WAEC / WASSCE 2016 Heat Energy & Temperature

Which of the following statements is not correct about steel and soft iron?

A

steel is more magnetized than soft iron

B

permanent magnets are usually made of steel

C

soft iron is more readily magnetized than steel

D

soft iron more readily loses its magnetism than steel

medium Difficulty