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E- Examination

For a loaded spiral spring, provided the ____________ of the spring is not exceeded, we write, F = -kx, where the symbols have the usual meaning.

E- Examination

PHY 191 GENERAL PHYSICS PRACTICAL

NATIONAL OPEN UNIVERSITY OF NIGERIA

## PHY191_PRACTICE_SET3

Question 1For 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

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 ________________

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

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

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.

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

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

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 ________

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

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

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 ___________________

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.

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 ________________________

The inverse of the period of oscillation is the same as its ________________________

**ANS: Frequency**

## PHY191_PRACTICE_SET4

Question 1The 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

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

_____________

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

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?

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

__________________

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 _______________

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

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

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.

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

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.

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

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

$\frac{Density of the liquid}{Density of water}$ = _______________ of the liquid

**ANS: Relative density**

DISCLAIMER: FOR EXAM PREPARATION & REVISION PURPOSES ONLY, NOT TO BE TAKEN INTO THE EXAM HALL

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