Question Library — KalmiPrep by Kalmitech

Physics WAEC / WASSCE 2011 Heat Energy & Temperature

Presbyopia is a defect of the eye resulting from

A

weak ciliary muscles

B

short eyeball

C

loss of sphericity of the lens

D

long eyeball

medium Difficulty

Physics WAEC / WASSCE 2011 Waves and Optics

The focal length of the eye-piece of an astronomical telescope is f1, while the focal length of the object is f2. Fro normal adjustment, the angular magnification is given by

A

\(\frac{f_2}{f_1}\)

B

1 - \(\frac{f_2}{f_1}\)

C

\(\frac{f_2}{f_1}\) - 1

D

\(\frac{f_1}{f_2}\)

medium Difficulty

Physics WAEC / WASSCE 2011 Waves and Optics

two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period

A

0.5s

B

1.0s

C

1.2s

D

2.0s

medium Difficulty

Physics WAEC / WASSCE 2011 Electricity and Magnetism

Which of the following substances does not conduct electricity?

A

graphite

B

glass

C

sulphuric acid

D

table salt solution

medium Difficulty

Physics WAEC / WASSCE 2011 Electricity and Magnetism

The unit of capacitance is

A

farad

B

coulomb

C

henry

D

ohms

medium Difficulty

Physics WAEC / WASSCE 2011 Electricity and Magnetism

An ammeter with a full scale deflection of 10mA has an internal resistance 0.5\(\Omega\). calculate the resistance of the shunt required to adapt it to read up to 3A

A

0.0167\(\Omega\)

B

0.0130\(\Omega\)

C

0.0250\(\Omega\)

D

0.1000\(\Omega\)

medium Difficulty

Physics WAEC / WASSCE 2011 Electricity and Magnetism

The resistivity, \(\mathit{P}\), of a material of length l, cross-sectional area A, resistance R, is given by the equation

A

\(\mathit{P} = \frac{RA}{l}\)

B

\(\mathit{P} = \frac{l}{RA}\)

C

\(\mathit{P} = \frac{Rl}{A}\)

D

\(\mathit{P} = \frac{R}{Al}\)

medium Difficulty

Physics WAEC / WASSCE 2011 Mechanics and Properties of Matter

A wire of length 30cm is moved with a speed of 2ms-1 at right angles to a magnetic field of flux density 0.4T. calculate the emf induced in the wire

A

0.15V

B

0.24V

C

2.70V

D

24.00V

medium Difficulty

Physics WAEC / WASSCE 2011 Waves and Optics

The main difference between echo and reverberation is that

A

reverberation is reflected sound while echo is refracted sound

B

the time interval between incident sound and reflecte sound is shorter for reverbration

C

the amplitude of an echo is greater

D

reverberation is from acoustic speakers while echo comes from clifts

medium Difficulty

Physics WAEC / WASSCE 2011 Heat Energy & Temperature

The correct relationship between "G" and "g" in a gravitational field is given by the equation (Where the symbols have their usual meanings)

A

g = \(\frac{GM}{R}\)

B

g = \(\frac{GM}{R^2}\)

C

g = \(\frac{GM^2}{R}\)

D

g = \(\frac{GM^2}{R^2}\)

medium Difficulty

Physics WAEC / WASSCE 2011 Heat Energy & Temperature

The capacitance of a parallel-plate capacitor

A

decreases when the seperation between the plate decreases

B

increases when the optential difference between the plates is increased

C

is greater without a dielectric material between the plates than with a dielectric

D

is greater with a dielectric between the plates than without a dielectric.

medium Difficulty

Physics WAEC / WASSCE 2011 Electricity and Magnetism

When the pointed end of an uncharged optical pin is brought near the cap cf a positively charged electroscope, it is observed that the gold

A

collapse slowly

B

vibrate

C

are not affected

D

diverge rapidly

medium Difficulty

Physics WAEC / WASSCE 2011 Mechanics and Properties of Matter

Which of the following practices will lead to losses in electrical power transmission?

A

using transmission cables of large diameter

B

transmitting at high voltage and low current

C

transmitting at relatively low voltage and high current

D

using a set-up transformer at the production end

medium Difficulty

Physics WAEC / WASSCE 2011 Waves and Optics

For photoelectric emission, the threshold frequency is the

A

maximum frequency of incident radiation that will eject elecrons

B

minimum fraquency of incident radiation required to eject elecrons

C

frequency which results in the emission of the greater number of electrons

D

fraquency whch impacts greatest kinetic energy to emitte electrons

medium Difficulty

Physics WAEC / WASSCE 2011 Modern Physics and Nuclear Physics

Which of the following properties is not applicable to X-rays? They

A

travel in straight lines

B

travel with the speed of light

C

are deflected by magnetic field

D

affect photographic films

medium Difficulty