Physics Past Questions And Answers
(a) Define angle of contact
(b) Draw sketches to show angles of contact for a capillary tube dipped vertically in (i) water; (ii) mercury.
View Discussion (0)WAEC 2000 THEORYA slinky spring fixed at one end is placed horizontally on a table. The free end is displaced parallel to the table and then released. The resultimg wavelength is
- A. transverse
- B. longitudinal
- C. stationary
- D. electromagnetic
Which of the following statements is not true of nuclear fission?
- A. Mother nucleus is broken into two daughter nuclei of roughly equal parts
- B. Neutron is normally used in bombarding heavy nucleus
- C. Two light nuclei are made to combine to form a heavy nucleus
- D. Very enormous energy is released
A body is projected horizonatlly from the top of a cliff 45m above the ground. if the body lands at a distance 30m from the foot of the cliff, calculate the speed of projection. [g = 10ms-2]
- A. 10ms-1
- B. 15ms-1
- C. 20ms-1
- D. 30ms-1
When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that
- A. it is about to rain
- B. the relative humidity is high
- C. there is plenty of sunshine
- D. the relative humidity is low
The design of the thermostat of an electric iron is based on the
- A. emmision of electrons from metals when heated
- B. increase in size of metals when heated
- C. increase in the density of metals when heated
- D. change in the mass of metals when heated
In a series R-L-C circuit at resonance, impedance is----
- A. maximum
- B. minimum
- C. capacitive
- D. inductive
An atom in an excited state is one whose
- A. potential energy is minimum
- B. potential energy is maximum
- C. electron are in the conduction band
- D. electron have moved to higher energy level
Which is the incorrect formula for a body accelerating uniformly?
- A. a = v\(^{2}\) − \(\frac{u^{2}}{2}\)
- B. v\(^{2}\)= u\(^{2}\)+ 2as
- C. s = ut + \(\frac{1}{2}\)at\(^{2}\)
- D. v\(^{2}\)− u\(^{2}\)= 2as
If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
- A) 90 m
- B) 30 m
- C) 45 m
- D) 60 m