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AQA - A Level Physics - Physics Skills

In your answer, powers are written by using the ^ symbol. For example, 10^3, 10^-6, etc.
Quiz by Nighthawk
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Last updated: July 8, 2020
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First submittedJuly 8, 2020
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Question
Answer
p - This prefix means?
10^-12
n - This prefix means?
10^-9
µ - This prefix means?
10^-6
m - This prefix means?
10^-3
k - This prefix means?
10^3
M - This prefix means?
10^6
c (centi) - This prefix means?
10^-2
G - This prefix means?
10^9
T - This prefix means?
10^12
What is the base unit of mass
kg
What is the base unit of length
m
What is the base unit of time
s
What is the base unit of current
A
What is the base unit of temperature
K (Kelvin)
What are the units of potential difference
V
What are the units of density
kgm^-3
Define control variable
Something that must be kept constant to prevent it affecting the dependent variable
Define repeatability
Similar results would be obtained if the experimental method was conducted again
Define reproducibility
The same result can be obtained using different equipment and/or techniques
How do you ensure a metre rule is vertical
Use a plumb line, set square or spirit level
How do you avoid parallax error
Ensure eye, object and scale are all in line with each other OR ensure object and scale are directly adjacent to each other
Question
Answer
Define systematic Error
An error that follows a consistent pattern
Define zero error
An error that occurs due to the measuring instrument reading a non-zero output when there is no input
Define accuracy
How close a measurement is to the 'true' or accepted value
Define precision
The smallest division in the scale of a measuring instrument/The smallest non-zero reading an instrument can take
What is the precision of a multimeter
Depends on the scale selected
What is the precision of a metre rule
1mm
What is the precision of vernier calipers
0.1mm
What is the precision of a micrometer
0.01mm
What is the precision of a stopclock
± the precision of the instrument
What is the absolute uncertainty in length
± the precision of the instrument
What is the absolute uncertainty in a repeated readings
± ½ the range of the repeats
What is the absolute uncertainty from a digital scale
± ½ the precision of the instrument
Define percentage uncertainty
( (Your value - 'calculated OR measured' value) ÷ 'calculated OR measured' value) × 100
How do you calculate the total uncertainty if quantities are added or subtracted?
The absolute uncertainties are added together
How do you calculate the total uncertainty if quantities are multiplied or divided?
The percentage uncertainties are added together
How do you calculate the total uncertainty if a quantity is raised to a power?
The percentage uncertainty is multiplied by that power
How do you find uncertainty in a gradient?
± (gradient of the line of best fit − gradient of the line of worst fit)
What is a line of worst fit?
A line that passes through the error bars with the greatest possible difference in gradient from the line of best fit
What are error bars?
Lines to show the range of the absolute uncertainty of each data point on a graph
What is relative uncertainty
(Absolute uncertainty ÷ 'calculated OR measured value')
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