The compressed regions and the space-out regions in longitude wave are refers to as
- A. Compression and Rarefaction
- B. Comparison and Explosion
- C. Reflection only
- D. Refraction only
Radio waves belong to the class of wave whose velocity is about
- A. 34m/s
- B. 3 Γ106m/s
- C. 3 Γ108m/s
- D. 3 Γ 10-8m/s
A member of the crew of a SPACESHIP experiences weightlessness in a space when they
- A. Fall freely from the earthβs gravitational field
- B. Is walking on the planet
- C. In between the sun and the earth
- D. Holding anything in space is negative
The external parts of an object can be measure accurately through the use of which scientific instrument?
- A. Micrometer screw gauge
- B. Vernier Caliper
- C. Meter rule
- D. None of the instrument
What is the relationship mechanical advantage (MA) velocity Ratio (V.R) and efficiency with percentage?
- A. e = M.A/V.R Γ 100 %
- B. M.A = E.V.R
- C. V.R = 1 Γ· sin ΞΈ M.A
- D. M.A = 1/E Γ 100%
Electrons were discovered by
- A. James Chadwick B.
- B. J.J Thompson
- C. Sir Isaac Newton
- D. Charles Newton
Primary colours of light are
- A. Red, blue and green
- B. Cyan, magneta and yellow
- C. Black, blue and green
- D. None of these colours
Mr. F. Abioye observed his image through a plane mirror, kept at a distance 4.7m away from him in his room. At what distance is the image found from Abioye’s eye?
- A. 9.4m
- B. 7.5m
- C. 5.7m
- D. 6.9m
Calculate the gravitation force of attraction between two planets of \(10^{24}\)kg and \(10^{27}\)kg separated by a distance of \(10^{20}\)meters
- A. 6.67N
- B. 6.56N
- C. 7.5N
- D. 8.6N
If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?
- A. Mechanical energy
- B. Stationary energy
- C. Potential energy
- D. Vibrational energy
In which of the following device is the expansion of solid not required?
I. Simple pendulum
II. Fire alarms
III. Thermostat
IV. Bimetallic thermometer
- A. III only
- B. II & III only
- C. I only
- D. II, III & IV only
A vector quantity can only be completely described when β¦β¦β¦ and β¦β¦β¦β¦are mentioned.
- A. Magnitude and motion
- B. Magnitude and direction
- C. Distance and specified displacement
- D. Moment and momentum
The resultant force of a couple is β¦β¦β¦?
- A. Infinity
- B. Zero
- C. One
- D. Half
Which of the following is not luminous object?
- A. The sun
- B. The moon
- C. light candle
- D. Star
A motor boy of a driver saw what seems to appear to be a pool of water a head of him, while his driver drives a new truck on a sunny day. Which of the following explains his observation?
- A. He saw a flying objects
- B. He must be thinking of water and food
- C. He was seeing the shadow of the car
- D. The sun ray from the sky were passing from a hot air (layer) to cold layer
The general gas law can be written as
- A. PV Γ· T = a constant
- B. PV = a constant
- C. v/t = a constant
- D. p/T = a constant
Body floats in fluid when its β¦β¦β¦β¦β¦β¦β¦
- A. Displaces its own volume of the liquid (fluid)
- B. Displaces its own weight of the fluid
- C. Displace its own density of the fluid
- D. Is no longer subjected to gravity
In an elastic collision
I. Energy is conserved
II. Energy is decreased
III. Energy is increased
IV. Linear momentum conserved
- A. I only
- B. I and IV only
- C. II only
- D. III only
A stroboscope can be used to make the wave appear β¦β¦β¦β¦..
- A. Stationary
- B. In motion
- C. Dipper
- D. Ripple
What is the inductance (L) of an inductor whose reactance is 1Ξ© at 50/ Ο hertz (H)?
- A. 100 H
- B. 0.01H
- C. 10H
- D. 1H