Physics Past Questions And Answers
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
The correct relationship between the displacement, s, of a particle initially at rest in a linear motion and the time, t, is?
- A.s \(\alpha\) t\(^{-2}\)
- B.s \(\alpha\) t\(^{-1}\)
- C.s \(\alpha\) t
- D.s \(\alpha\) t\(^{2}\)
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
The mass of a load is doubled while the force acting on it is halved. The resulting acceleration of the load is
- A. quadrupled
- B. quartered
- C. halved
- D. doubled
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) Explain cations
(b) Draw and label an electrolytic cell.
.jpg)
A 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
Calculate the heat energy required to vaporize 50g of water initially at 80ºC if the specific heat capacity of water is 4.23jg−1k−1 (specific latent heat of vaporization of water is 2260jg−1
- A. 530000J
- B. 23200J
- C. 17200J
- D. 130000J