Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 1989 Heat Energy & Temperature

When a number of identical small magnets are arranged in a line, the strength of the resultant magnet

A

ia largest when they are arranged end to end

B

is greatest when they are arrangedparallel with like poles adjacent to each other

C

depends only on the number of magnets provided they arev parallel

D

is greater when the magnets are arranged on a wooden surface than on a metaln surface

medium Difficulty

Physics UTME / JAMB 1989 Heat Energy & Temperature

A calibrated potentiometer is used to measure the e.m.f. of a cell because the

A

internal resistance of a cell is small compared with that of the potentiometer

B

potentiometer has a linear scale

C

potentiometer takes no current from the cell

D

resistance of the potentiometer is less than that of a voltmeter

medium Difficulty

Physics UTME / JAMB 1989 Heat Energy & Temperature

A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be I.γ-rays \beta-rays II. x-rays \beta-rays III. γ-rays x-rays IV. x-rays x-rays

A

I only

B

III only

C

I and II

D

III and IV

medium Difficulty

Physics UTME / JAMB 1989 Heat Energy & Temperature

Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

Attached Figure / Diagram

A

0.75µF

B

1.33µF

C

3.00µF

D

6.00µF

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following correctly gives the relationship between linear speed V and angular speed ω of a body moving uniformly in a circle of radius r?

A

V = ωr

B

V = ω2r

C

V = ωr2

D

V2 = ωr

E

V = ω/r

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

The motion of a body is simple harmonic if the

A

Acceleration is always directed towards a fixed point

B

path of motion is a striaght line

C

Acceleration is directed towards a fixed point and proportional to its distance from the point

D

Acceleration is proportional to the square of the distance from a fixed point

E

Acceleration is constant and directed towards a fixed point

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following statements about the gaseous state of matter is not correct? The molecules of a substance is in gaseous state

A

are in constant state of motion

B

have different speed

C

have a temperature which is an average measure of the kinetic energy

D

have no intermolecular attractive force

E

have a pressure which is determined by the number of molecules present

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following is a reason why a concrete floor feels colder to the bare feet than a mat on the same floor during the rainy season?

A

A mat if s better conductor of heat than the feet

B

Mat losses heat to the bare feet at a faster rate than concrete floor

C

Mat losses heat to the bare feet while the concrete floor extracts heat from them

D

Concrete floor is a better conductor of heat than the mat

E

Mat is a better conductor of heat than the floor

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following best explains a person suffers more severe burns when his skin is exposed to steam than when boiling water is poured onto his skin?

A

steam is at a higher temperature than boiling water

B

steam posses greater heat energy per unit-mass than boiling water

C

steam spreads more easily over a wider area of the skin than boiling water

D

steam panetrates more easily over a wider area of the skin than boiling water

E

the specific latent heat of vaporization is released in changing from boiling water to steam

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following statements about radiant heat is/are not correct? I. radiant heat cannot travel through a vacuum II. rough surfaces emit radiant heat more than polished surfaces III. Dark surfaces absorb radiant heat more than bright surfaces

A

I only

B

II only

C

III only

D

I & II only

E

II & III only

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following instrument may be used to measure the relative humidity?

A

Hydrometer

B

Barometer

C

Manometer

D

Hypsometer

E

Hygrometer

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

A transparent rectangular block 5.0cm thick is placed on a black dot. The dot when viewed from above is seem 3.0cm from the top of the block calculate the refractive index of the material of the block.

A

2/5

B

3/5

C

3/2

D

5/3

E

5/2

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

The ability of the eye to focus objects at different distances is called

A

power

B

accommodation

C

normal vision

D

persistence of vision

E

long sight

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

(a) Explain what is meant by: (i) electric field intensity ; (ii) electric lines of force. (b) Two similar but opposite point charges -q and +q each of magnitude \(5 \times 10^{-8} C\) are seperated by a distance of 8.0cm in vacuum as shown in the diagram below. Calculate the magnitude and direction of the resultant electric field intensity E at the point P. Draw the lines of force due to this system of charges. [Take \(\frac{1}{4 \pi \varepsilon _{0}}\)] (c) Calculate the following in the series circuit shown above: (i) reactance of the capacitor ; (ii) impedance of the circuit ; (iii) current through the circuit ; (iv) voltage across the capacitor ; (v) average power used in the circuit.

A

uniform accelation

B

instateneous velocity

C

initial velocity

D

average speed

E

average velocity

medium Difficulty

Physics WAEC / WASSCE 1988 Heat Energy & Temperature

Which of the following statement is not correct about loaded spiral spring?

A

The extension is proportional to the load applied, provided the elastic limite is not exceeded

B

If the elsatic limit is not exceeded, the contraction is proportional to the load removed.

C

Up to the yield limit, extension is no longer proportional to the applied load.

D

Beyond the elsatic limit, extension is no longer proportional to the applied load.

E

If the string regains its shape or form after deformation, it is said to be elastic.

medium Difficulty