introductory physics practical
1 In an experiment to determine the acceleration due to gravity g, T2 was plotted on the vertical axis and l on horizontal axis. The value of g is obtainable from -----------
intercept on T2-axis
intercept on l-axis
inverse of the ratio T2l
slope of the graph
2 In an experiment to determine the acceleration due to gravity g using the simple pendulum, T2 was plotted on the vertical axis and l on horizontal axis. The graph
has an intercept on the T2-axis
has an intercept on the l-axis
passes through the origin
is parallel to the l-axis
3 Which of the follwing graphs gives the correct linear relationship between P and V in Boyle's law?
P plotted against V
V plotted against T
P plotted against 1/V
V plotted against 1/T
for the maximum possible error in a measurement is ----------
1/2 of the smallest scale division of the instrument used
the same as the smallest scale division of the instrument used
twice the smallest scale division of the instrument used
zero
5 Which of the following is correct?
the greater the possible error the greater the precision of the measurement
the less the possible error the greater the precision of the measurement
the less the possible error the less the precision of the measurement
the geater the possible error the less the precision of the measurement
6 In an experiment to determine the relationship between the current I through a piece of tungsten wire and the potential difference V across it, the theoretical relationship used was I=kVn , where k and n are constants which may be obtianed from a straight line graph of the form y = mx + c, the symbols having their usual meaning. The value of k can the be experimentally determined from ---------
the slope of the graph of logI plotted on the vertical axis against logV plotted on the horizontal axis
the intercept on the vertical axis of the graph of logI plotted on the vertical axis against logV plotted on the horizontal axis
the slope of the graph of I plotted on the vertical axis against V2 plotted on the horizontal axis
the intercept on the horizontal axis of the graph of I plotted on the vertical axis against V2 plotted on the horizontal axis
7 Which of the following experimental techniques reduces the systematic error of the quantity being ivestigated?
timing a large number of oscillations to find a period
measuring the diameter of a wire repeatedly and calculating the average
adjusting an ammeter to remove zero error before measuring current
counting down to start the stop-watch at zero in timing oscillations
8 The smallest scale division of a stop watch is 0.1s. Calculate the possible error in the measurement of time recorded as 7.4s by an experimenter using the stop watch
0.1
0.02
0.05
0.007
9 A student recorded the length of a piece of wire measured with the meter scale as 98.6cm. What is the relative error in the measurement?
0.0005
0.005
0.05
0.5
10 In an experiment to verfy Newton's law of cooling, the temperature of hot water in a calorimeter ToC is plotted against time t/min. Which of the following is true about the graph?
the graph is linear and parallel to the T-axis
the slope of the graph is positive
the slope of the graph is negative
the graph is hyperbola
11 Which of the following is an appropriate unit of measurement of distance between two cities?
mm
cm
m
km
12 Which of the following is NOT true in the experiment to determine the acceleration due to gravity by means of a simple pendulum from inaccessible height, where h is the height of the bob from the floor and H the inaccessible height?
T=2gH−h
The intercept on the T2- axis for T2 plotted against h gives the inaccessible height
The graph of T2 against h is linear
the slope of T2 plotted against h is negative
13 An experimental observation was written in terms of scientific notation as A10n, where n is an integer. The value of A must
be greater than 10
be less than zero
lie between 1 and 10
be zero
14 One of the following precuations in experiments involving the determination of the period of a simple pendulum given is NOT correct
preventing draught
reading the values of length or time with the eye placed vertically above scale marks
starting the stop watch and the oscillation oscillation simultaneously
using small angular displacements from equilibrium position
15 In an experiment, 20 complete osillations were made in 14 .3 seconds. Determine the period the square of the period T2
0.511
0.143
1.432
4.891
16 What is the frequency of oscillation of a simple pendulum which makes 50 oscillations in 24.4 seconds?
0.231 Hz
0.041 Hz
0.488 Hz
2.049 Hz
17 In an experiment involving a loaded helical spring, the relationship T=2kM+m , was suggested as the relationship between the period T, the loaded mass M and the effective mass of the spring m. Which of the following gives the effective mass m?
The slope of M plotted against T
The intercept on the horizontal axis for T2 plotted against M
The intercept on the vertical axis for T plotted against M
The reciprocal of the slope of M plotted against T
18 The equation of a simple harmonic oscillator may be written as a=−2x (the symbols have their usual meaning). In an experiment to determine the period of oscillation of a loaded spiral spring T, which of the following is the correct relationship between T and ?
T =
T = 2
T = 2
T=
19 In an experiment to determine the period of oscillation of a loaded spiral spring, the equation of a simple harmonic oscillator a = -(k/m)x, where the symbols have their usual meaning, was used. Write down the equation for the angular frequency in terms of k and m, the effective mass of the system
= k/m
= m/k
= km)
= mk
20 In an experiment to determine the surface tension of water by the capillary rise method, the surface tension depends on all of the following EXCEPT------------
interna radius of the capillary tube
the height of the water column
density of water
compressibilty of water
