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# NOUN iLearn Past Questions and Answers - PHY 191 GENERAL PHYSICS PRACTICAL

NOUN iLearn Past Questions and Answers
E- Examination
PHY 191 GENERAL PHYSICS PRACTICAL
NATIONAL OPEN UNIVERSITY OF NIGERIA

## PHY191_PRACTICE_SET3

Question 1
For a loaded spiral spring, provided the ____________ of the spring is not exceeded, we write, F = -kx, where the symbols have the usual meaning.
ANS: Elastic limit
Question 2
In an experiment to determine the surface tension of water by the capillary rise method, the instrument called __________________ is used to measure the capillary rise
ANS: Travelling microscope
Question 3
In an experiment to verify Boyle's law, a student plotted P against V. His graph is a ________________
ANS: Hyperbola
Question 4
The temperature at which, theoretically all thermal motions will cease is called _____________
temperature
ANS: Absolute zero
Question 5
In an experiment to determine the specific heat of fusion of ice the calorimeter must be ______________ to prevent loss of heat to the surrounding
ANS: Lagged
Question 6
In all experiments involving the method of mixtures (calorimetry), uniform temperature of the mixture is maintained by continually and gently ____________ it.
ANS: Stirring
Question 7
To determine the coefficient of friction between two surfaces we can place a block of material such as wood on an __________ and gradually increase its angle until the block just begins to slide
ANS: Inclined plane
Question 8
The coefficient of friction between two surfaces is defined the ratio of the frictional force to ___________ to the surfaces
ANS: The normal reaction
Question 9
An experiment was performed to determine the coefficient of friction using the scale pan or slotweights method. A graph of the tension T in the string connecting the block on a bench and passing over a pulley to a freely hanging pan or slot-weighs was plotted against the weight W of the block. The slope $\frac{\Delta{T}}{\Delta{W}}$ gives the ________
ANS: Coefficient of friction
Question 10
Relative density of a liquid or granular substance not soluble in water can be experimentally determined using an apparatus known as relative density or _________ bottle
ANS: Specific gravity
Question 11
In practical physics it advisable to display your observation data in an all-inclusive table known as
____________ table
ANS: Observation
Question 12
In general, a device used for measuring mass in the laboratory is called ___________________
ANS: A balance

Question 13
In experiments involving oscillations, the number of complete oscillations per unit time is the ___________ of the oscillation
ANS: Frequency
Question 14
If n complete oscillations are made in t seconds, then the period T of oscillation is given as T=___________ s.
ANS: t/n
Question 15
The inverse of the period of oscillation is the same as its ________________________
ANS: Frequency

## PHY191_PRACTICE_SET4

Question 1
The maximum displacement of an oscillating system from its equilibrium position is referred to as its
__________
ANS: Amplitude
Question 2
The statement "the upthrust experienced by an object that is wholly or partially immersed in a fluid is equal to the weight of the liquid displaced" is the _________ principle
ANS: Archimedes
Question 3
In the laboratory, the device usually used for measuring the diameter of a piece of wire is called
_____________
ANS: Micrometer screw gauge
Question 4
The instrument usually used for measuring the internal diameter of a test-tube in the laboratory is
ANS: Vernier calipers
Question 5
In an experiment, the function $y={-}ax{^2} +bx+c$, where a, b and c are constant, was plotted with y on the vertical axis and x on the horizontal axis. At maximum point on the graph, the tangent to the curve to the x-axis?
ANS: Parallel
Question 6
The gradient of the tangent to a cooling curve (temperature versus time curve as a substance cools) is
__________________
ANS: Negative
Question 7
If the tangent to a curve at a point is parallel to the horizontal axis, then the gradient of the curve at that point is _______________
ANS: Zero
Question 8
The error in the measurement of a physical quantity due to wear and of the measuring instrument is called ______________ error
ANS: Back lash error
Question 9
The weight of the column of liquid in a capillary tube is supported by the upward ___________ force
ANS: Surface tension
Question 10
In the equation $Q = mc\theta$, where Q is the amount of heat energy, m the mass of substance and $\theta$ the change in temperature, c refers to ______________ of the substance.
ANS: Specific heat capacity
Question 11
The method of mixtures as a means of measuring specific heat capacity and latent heat is based on the principle of _____________ of energy
ANS: Conservation
Question 12
In an experiment involving a loaded helical spring, the relationship $T = 2\pi\sqrt{\frac{(M+m)}{k}}$, was suggested as the relationship between the period T, the loaded mass M and the effective mass of the spring m. If $T^{2}/s{2}$ was plotted on the vertical axis against M/kg on the horizontal axis, the graph should have an __________ on the vertical axis.
ANS: Intercept

Question 13
In an experiment involving a loaded helical spring, the relationship $T = 2\pi\sqrt{\frac{(M+m)}{k}}$, was suggested as the relationship between the period T, the loaded mass M and the effective mass of the spring m. If $T^{2}/s{2}$ was plotted on the vertical axis against M/kg on the horizontal axis, the effective mass of the system would be the __________ on the horizontal axis.
ANS: Intercept
Question 14
In an experiment, the relationship between frictional force f and normal reaction R was given $f=\mu{R}.$\mu$is the ______________ of the graph of f versus R ANS: Slope Question 15$\frac{Density of the liquid}{Density of water}\$ = _______________ of the liquid

ANS: Relative density

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