Question Library — KalmiPrep by Kalmitech

Physics WAEC / WASSCE 2003 Heat Energy & Temperature

Which of the following statements is not true of the isotopes of an element? They

A

are atoms of the same element

B

have the same chemical properties

C

have the same atomic number

D

have the same mass number

medium Difficulty

Physics WAEC / WASSCE 2003 Heat Energy & Temperature

Which of the following reactions represents nuclear fusion?

A

\(^2_1H + ^2_1H \to ^3_2He + ^1_0n\)

B

\(^235_92U + ^1_0n \to ^145_56Ba + ^90_36Kr \)

C

\(^234_90TH \to ^0_-1n + ^3_2He + ^1_0Pa\)

D

\(^238_92U \to ^4_2H \to ^3_2He + ^234_90Th\)

medium Difficulty

Physics WAEC / WASSCE 2003 Heat Energy & Temperature

The bar magnet illustrated in the diagram above picks up an unmagnetised steel nail X. In turn, X picks up a similar nail Y and so on. The nail are said to be magnetised by

Attached Figure / Diagram

A

conduction

B

single touch

C

induction

D

divided touch

medium Difficulty

Physics WAEC / WASSCE 2003 Heat Energy & Temperature

You are provided with a potentiometer x y; a jockey, J; a standard resistor, R, and other necessary apparatus. Connect a circuit as shown in the diagram above. Close the key. Read and record the current 10 when J is not in contact with XY. Let J make contact with XY at C, such that XC = l= 25 cm. Close the key. Read and record the current l. Evaluate I\(^{-1}\). Repeat the procedure for four other values of I = 40, 55, 70, and 85 cm. Tabulate your readings. Plot a graph of l on the vertical axis against I\(^{-1}\) on the horizontal axis. From your graph, deduce the value of I when l\(^{-1}\) = 0. Evaluate \(\frac{|O}{1}\) State two precautions taken to ensure accurate results. (b)i) Explain what is meant by the potential difference between two points in an electric circuit. ii. A piece of resistance wire of diameter 0.2m and resistance 7\(\Omega\) has a resistivity of 8.8 x 10\(^{-7}\) \(\Omega\)m. Calculate the length of the wire. [\(\pi\) = \(\frac{22}{7}\)].

A

conduction

B

single touch

C

induction

D

divided touch

medium Difficulty

Physics UTME / JAMB 2003 Heat Energy & Temperature

In the calibration of an ammeter using faraday's laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes , the correction to be applied to the ammeter is

A

0.03A

B

0.04A

C

0.05A

D

0.06A

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

Which of the following instruments can be used to measure e.m.f. most accurately.

A

Ammeter

B

Galvanometer

C

Metre bridge

D

Potentiometer

E

Voltmeter

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

Evaporation of a liquid produces cooling of the liquid because the

A

attraction between the vapour molecules and the liquid molecules is great

B

average kinetic energy of the liquid is reduced

C

density of the liquid decreases

D

vapour pressure above the liquid rises

E

volume of the liquid decreases

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

For which of the following sets are the units fundamental?

A

Area, length and volume

B

Impulse, mass and time

C

Length, time and mass

D

Velocity, distance and time

E

Volume, mass and density

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is

A

0.25

B

0.50

C

1.00

D

2.20

E

4.00

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?

A

The length of the entrapped air in the horizontal position is less than that in the vertical position

B

The length of the entrapped air in the vertical position is less than that in the horizontal position

C

The length of the mercury column becomes shorter in the horizontal position than in the vertical position

D

The length of the mercury column becomes shorter in the vertical position than in the horizontal position

E

The pressure of the entrapped air is atmospheric in both cases.

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

The inability of the eye to focus near objects is known as

A

astigmatism

B

eye ring

C

hypermatropia

D

myopia

E

presbyopia

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the

A

charges generated by friction in the tanker are conducted to the earth

B

chain vibrates in resonance with the tanker’s engine

C

heat generated by friction in the engine is conducted to the earth

D

petrol tanker is balanced on the road

E

tanker does not exceed a certain speed limit

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

Which of the following statements about the concept of solid friction is NOT true?

A

It always acts in the direction of motion

B

It causes wear and tear in car tyres

C

It depends on the nature of the surfaces in contact

D

It is independent of the area of the surfaces in contact.

E

It reduces the efficiency of the machine

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same I. chemical properties II. nucleon number III proton number

A

I only

B

II only

C

I and II only

D

I and III only

E

I,II and III

medium Difficulty

Physics NECO SSCE 2003 Heat Energy & Temperature

J.J. Thomson’s model of the atom was abandoned because

A

it could not explain the scattering of alpha particles

B

it did not account for the neutron

C

it did not account for the size of the atom

D

it was known as plum-pudding model

E

the model was not similar to any observable phenomena

medium Difficulty