2016 - WAEC Physics Past Questions and Answers - page 2
11
A plank is placed along the path on which a wheel barrow containing sand is pushed at a construction site to prevent it from sticking as illustrated in the diagram given. The large area of the plank prevents the wheel barrow from getting stuck by
A
increasing the reaction on the ground
B
increasing the pressure on the ground
C
decreasing the pressure on the ground
D
decreasing the weight on the ground
correct option: c
Users' Answers & Comments12
When a body is thrown vertically upwards, its velocity at the maximum height is
A
maximium
B
zero
C
double its initial value
D
half its initial value
correct option: b
Users' Answers & Comments13
Resonance occurs when one vibrating object causes a second object to vibrate at its own natural
A
amplitude
B
speed
C
frequency
D
intensity
correct option: c
Users' Answers & Comments14
The mouth piece of a telephone handset converts
A
electrical energy to sound energy
B
sound energy to electrical energy
C
sound energy to radiowave
D
radiowave to sound energy
correct option: b
Users' Answers & Comments15
In the clinical thermometer, the function of the kink is to i. Prevent the back flow of mercury after use. ii. Ensure the back flow of mercury after use. iii. Maintain the thermometric property of mercury. iv. Allow the temperature attained to be read.
A
i only
B
i and ii only
C
i and iv only
D
iii and iv only
correct option: c
Users' Answers & Comments16
Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the
A
saturated vapour pressure equals the atmospheric pressure
B
molecules leaves the liquid at a rate equal to the rate at which they return
C
molecules leave the liquid at a rate higher than that at which they return
D
molecules leave the liquid at a rate lower than the rate at which they return
correct option: a
Users' Answers & Comments17
The diagram given is used to determine the
A
boiling point of water
B
atmospheric pressure
C
upper fixed point of a thermometer
D
amount of water in the atmosphere
correct option: c
Users' Answers & Comments18
An aluminium rod of length 1.8m at 10°C is heated to proceed produce a difference in length of 0.007m. Calculate the temperature to which it is heated. (Linear expansivity of aluminium = 2.3 x 10\(^{-5}\)K\(^{-1}\)
A
155oC
B
160oC
C
169oC
D
179oC
correct option: d
\(\alpha = \frac{L_2 - L_1}{L_1(\theta_2 - \theta_1)}\)
L\(_2\) - L\(_1\) = \(\alpha L_1 (\theta_2 - \theta_1)\)
\(\theta_2 = \frac{0.007}{2.3 \times 10^{-5} \times 1.8}\) + 10
= 179°C
19
A mercury-in-glass thermometer read 4cm at ice point and 29cm at steam point. Calculate the temperature when the mercury level is at 9cm
A
13oC
B
20oC
C
33oC
D
38oC
correct option: b
Users' Answers & Comments20
The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures
A
continuous dissipation of heat to the room
B
uniform distribution of thermal energy to all parts of the mixture
C
that the thermal energy is confined to the mixture
D
that there is rapid heat exchange
correct option: b
Users' Answers & Comments