Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 1985 Waves and Optics

A 45o triangular glass prism can be used as a reflector of light because

A

A refraction never takes place in such a prism

B

the angle of reflection equals the angle of incidence

C

the refractive index of glass is less than 1

D

it is transparent

E

the critival angle angle for glass is less than 45o

medium Difficulty

Physics UTME / JAMB 1985 Waves and Optics

A convex mirror is used as a driving mirror because i. its image is erect. ii. it has a large field of view. iii. it has a long focal length. Identify the CORRECT statement(s)

A

i andiii only

B

i and ii only

C

ii and iii only

D

i, ii, and iii only

E

i only

medium Difficulty

Physics UTME / JAMB 1985 Waves and Optics

Two rays of light from a point below the surface of water are equally inclined to each other at 60o in water. What is the angle between the rays when they emerge into air? (Take the refractive index of water to be \(\frac{4}{3}\))

A

41.8o

B

44.1o

C

60.0o

D

83.6o

E

120.0o

medium Difficulty

Physics UTME / JAMB 1985 Waves and Optics

In the Fig above, MN is a light uniform meter rule pivoted at O, the 80cm mark. A load of mass 3.00kg is suspended on the meter rule at L, the 10cm mark. If the rule is kept in equilibrium by a string RP, fixed at P and attached to the rule at R, the 20cm mark, then the Tension T on the string is?

Attached Figure / Diagram

A

3.0N

B

3.4N

C

3.5N

D

6.0N

E

7.0N

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

For a concave mirror to form a teal diminished image, the object must be placed

A

behind the mirror

B

between the mirror and its focus

C

between the focus and the centre of curvature

D

at the centre of curvature

E

at a distance greater than the radius of curvature

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

One of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4 beats per second are heard when they are sounded together. What is the frequency of the loaded tuning fork?

A

260Hz

B

252Hz

C

248Hz

D

264Hz

E

258Hz

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length

A

i only

B

ii only

C

iii only

D

i and iii

E

ii and iii

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

What is the apparent colour of a RED SHIRT when viewed in PURE green light?

A

Red

B

Green

C

Yellow

D

Black

E

Blue

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

The spectrum of white light consists of coloured lights arranged in the following order

A

blue, red, green, yellow, indigo, violet, orange

B

red, orange, yellow, green, blue, indigo, violet

C

red, orange, yellow, indigo, green, blue, violet

D

indigo, green, blue, violet, yellow, red, orange

E

yellow, blue, green, violet, orange, indigo, red

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

Which of the following i. \(\beta\)-particles ii. protons iii. neutrons iv. \(\alpha\)-particles. may be found in light nuclei?

A

i and ii

B

i and iii

C

ii and iv

D

ii and iii

E

i, ii and iii

medium Difficulty

Physics UTME / JAMB 1984 Waves and Optics

Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces? i. all metallic surfaces emits the same number of photoelectrons in a given light ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency

A

i only

B

ii only

C

i and ii

D

ii and iii

E

iii only

medium Difficulty

Physics UTME / JAMB 1983 Waves and Optics

A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms -1, how much closer is the ship to the cliff?

A

10m

B

125m

C

175m

D

350m

E

1,000m

medium Difficulty

Physics UTME / JAMB 1983 Waves and Optics

which of the following is NOT correct? i. the pitch of a sound note depends on the frequency of vibrations. ii. the intensity of a sound note is proportional to the amplitude of vibrations. iii. beats are produced by two sources of sound because one wave is travelling faster than the other. iv. when two sources of sound of frequencies 500Hz and 502Hz are sounded together, a beat frequency of 2Hz is observed. v. the first harmonic of a tone have double the frequency of the fundamental note.

A

i and ii

B

ii and iii

C

i and iii

D

iii and iv

E

iv and v

medium Difficulty

Physics UTME / JAMB 1983 Waves and Optics

Which of the following statements about defects of vision is/are CORRECT? i. for a long sighted person, close objects appear blurred. ii. for a short sighted person, distant objects appear blurred. iii. short sight is corrected by using a pair of converging lenses.

A

i only

B

ii only

C

i and ii only

D

ii and iii only

E

i, ii and iii

medium Difficulty

Physics UTME / JAMB 1983 Waves and Optics

The range of wavelengths of the visible spectrum is 400nm - 700nm. The wavelength of gamma rays is

A

longer than 700nm

B

shorter than 700nm but longer then 400nm

C

550nm

D

shorter than 400nm

E

infinite

medium Difficulty