Physics Past Questions And Answers
A particle carrying a charge of 1. 0 x 10-8C enters a magnetic field at 3.0x 10-2 ms -1 at right angles to the field. If the force on this particle is 1.8 x 10-8N, what is the magnitude of the field?
- A. 6.0x10-1T
- B. 6.0x10T
- C. 6.0x10-3T
- D. 6.0x10-4T
The thermometric properties of the thermocouple is that is
- A. e.m.f. changes with temperature
- B. resistance changes with temperature
- C. volume changes with temperature
- D. pressure changes with resistance
Which of the illustrated graphs below represents a body moving with uniform retardation?
- A. A
- B. B
- C. C
- D. D
The graph above shows the expansion of water as the temperature increases from 0°C. Which of the following deductions from the graph are true? i. Water has its maximum density at Q. ii. The volume of water is greater at 0°C than at 4°C. iii. The volume of water decreases uniformly when cooled from 100°C. iv. When water solidifies, its volume increases
- A. i and ii only
- B. i and iii only
- C. ii and iii only
- D. i, ii and iv only
An 800 kg car moving at 80 km hr\(^{-1}\) collides with a 1200 kg car moving at 40 km hr\(^{-1}\) in the same direction. If the cars stick together, calculate their common velocity.
- A. 60 km hr\(^{-1}\)
- B. 8 km hr\(^{-1}\)
- c. 40 km hr\(^{-1}\)
- d. 56 km hr\(^{-1}\)
What is the velocity of sound at 100oC if the velocity of sound at 0oC is 340ms-1?
- A. 497m-1
- B. 440m-1
- C. 397m-1
- D. 240m-1
A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms-2]
- A. 9 x 104NM-2
- B. 4 x 104NM-2
- C. 3 x 104NM-2
- D. 2 x 104NM-2
Which of the following is used for the correction of short sightedness?
- A) convex lens
- B) concave lens
- C) convex mirror
- D) concave mirror
A ball is projected specific latent heat of ice = 3.4 x 10\(^{2}\) Jg\(^{-1}\) horizontally from a height of 20m above the ground specific heat capacity of water = 4.2 Jg\(^{-1}\) K\(^{-1}\) with an initial velocity of 0.4ms\(^{-1}\). Calculate the horizontal distance moved by the ball before hitting the ground. [g = 10ms\(^{-1}\)]
View Discussion (0)WAEC 2005 THEORYA 3m3 volume of liquid W of density 200kgm3 is mixed with another liquid L of volume 7m3 and density 150kgm-3. the density of mixture is?
- A. 165kgm-3
- B. 100kgm-3
- C. 265kgm-3
- D. 350kgm-3