Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 1980 Heat Energy & Temperature

Which of the following statements are true of the law of universal gravitation?

A

any two bodies attract each other with a force which is proportional to the difference of their masses

B

any two bodies attract each other with a force which is inversely proportional to the square of the distance between them

C

any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them

D

any two bodies attract each other with a force which is proportional to the square of the distance between them

E

any two bodies attract each other with a force which is proportional to the sum of their masses

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

Which of the following statements are true in the structure of atoms?

A

the atoms of the differnt element differ only in the number of protons and electrons

B

the num,ber of protons equals the number of electrons

C

atoms are constructed according to the plan of our solar system

D

all of the above

E

A and C only

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

Which of the following physical quantities is NOT a vector?

A

velocity

B

work

C

force

D

electric field intensity

E

magnetic induction

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

which of the following does NOT cause a reduction of the surface tension of water?

A

soap solution

B

detergent

C

alcohol

D

camphor

E

grease

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

Heat is supplied to a block of ice 0o until half of it has melted. Which of the following statements is true?

A

the temperature rises and the ice exoands

B

the temperature remains constant and the volume of ice decreases

C

the ice gives out heat as it melts

D

the mass remains constant and the temperature increases

E

the mass decreases because some heat is lost to the atmosphere

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

High Tension(H.T.) transmission means

A

to transmit a given amount of power, the tension in the conducting wire must be high

B

heat is not lost when current is passed through a conductor

C

heat is gained when a given power is transmitted

D

a big transformer is required to transmit power

E

trasmission of power at low current and high voltage

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is \( \beta \) which of following statements is true???

A

\( \alpha = \beta \)

B

the efractive index of glass is \( \frac{sin\theta}{sin\alpha} \)

C

The ray suffers total internal reflection if \( \beta \) is greater than the critical angle

D

the efractive index of glass is \( \frac{sin\alpha}{sin\beta} \)

E

0.6N.m

medium Difficulty

Physics UTME / JAMB 1980 Heat Energy & Temperature

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

Attached Figure / Diagram

A

0.30

B

0.60

C

1.67

D

2.33

E

2.36

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

Which of the following statements defines correctly the efficiency of a machine?

A

the load carried by the machine divided by effort required in carrying the load

B

the distance moved by the load divided by the distance moved by the effort

C

the useful work done by the machine divided by the total work put into the machine

D

the movement of the load divided by the movement of the effort about the same point

E

the temperature at the end of the application of the machine divided by the initial temperature

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?

A

the polished vessel will cool faster because a polished surface is a good radiator

B

the polished vessel will cool faster because it will absorbe less heat from the room

C

the black vessel will cool faster because it is a better conductor of heat

D

the polished vesselwill cool faster because it reflects heat better

E

the black vessel will cool faster because a black surface radiates heat faster than a polished one

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of

A

4

B

\(\frac{\pi}{2}\)

C

\(\frac{1}{4}\)

D

2\(\pi\)

E

2

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

When the vapour of a substance is in equilibrium with its own liquid, it is said to be

A

gaseous

B

unsaturated

C

liquefied

D

diffused

E

saturated

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

What are the units of thermal conductivity?

A

kg.m.sec2

B

Joule sec-1m-1k-1

C

kg.m

D

Newton sec-1m2

E

m3

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by

A

heating the bar to a high temperature

B

breaking the bar

C

connecting opposite poles with a small piece of iron

D

placing the bar inside a strong magnetic field

E

none of the above

medium Difficulty

Physics UTME / JAMB 1979 Heat Energy & Temperature

On which of the following is the operation of a moving coil galvanometer based?

A

Magnetic effect of electric current

B

Electromagnetic induction

C

Chemical reaction produced by electricity

D

Force on current carrying conductor in a magnetic field

E

Electrical energy and power

medium Difficulty