PHYSICS FORM 2

ONLINE TESTS SERIES

MEASUREMENTS 2

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

SUN30

What is done to obtain an accurate answer?

 

 
 
 
 

2. Vernier calipers are shown with the jaws closed.

SUN31

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

SUN32

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?SUN34
 
 
 
 
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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