PHYSICS FORM 2

ONLINE TESTS SERIES

MEASUREMENTS 2

1. A micrometer is used to measure the diameter of a uniform wire.

What is done to obtain an accurate answer?

 

 
 
 
 

2. Vernier calipers are shown with the jaws closed.

What is the zero error?

 
 
 
 
  1. The variation with speed v of the force F acting on an object is given by the expression

F = pv2 + qv,

where p and q are constants.

What quantity should be plotted on the y-axis of a graph and what should be plotted on the x-axis in order to give a straight-line graph?

y-axis x-axis
A. v
B. v2
C. F v
D. F v2
 
 
 
 
  1. The speed of sound v in a gas is related to the pressure P of the gas by the expression

where k is a constant.

Which variables should be plotted in order to produce a straight-line graph with the slope equal to k?

 
 
 
 
  1. Sub-multiples of units may be expressed using a prefix. Which one of the following lists the prefixes in decreasing order of magnitude?
A. centi- micro- milli- nano-
B. milli- centi- nano- micro-
C. centi- milli- micro- nano-
D. milli- micro- centi- nano-

 

 
 
 
 
  1. What is the reading on this micrometer?
 
 
 
 
7. How can you locate the centre of mass of an irregular object?
 
 
 
 
8. What is the frequency of a simple pendulum if the time period is ten seconds?

(1Hz = 1cycle per second)
 
 
 
 
9. Where is the centre of mass located on a rectangle of length 5cm and width 3cm if the mass is distributed evenly throughout the object?
 
 
 
 
10. A simple pendulum oscillates 50 times per second. What is the frequency of the pendulum? (Frequency = cycles per second)
 
 
 
 

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