Working as a Physicist

Category: Working as a Physicist

Units

1 / 15

Which is the SI unit for mass?

gram

kilogram

metric tonne

2 / 15

Which is the SI unit for length?

millimetre

metre

astronomical unit

3 / 15

Which is the SI unit for time?

hour

parsec

second

4 / 15

Which is the SI unit for current?

volts

ampere

joule

5 / 15

Which is the SI unit for temperature?

kelvin

celsius

fahrenheit

6 / 15

Which is the SI unit for the amount of a substance?

kilogram

mole

litre

7 / 15

Which is the SI unit for luminous intensity of an object?

lux

pascals

candela

8 / 15

Which unit measures force?

Newtons

kilograms

pascals

9 / 15

Which unit measures work?

watts

joules

volts

10 / 15

Which unit measures power?

watts

joules

volts

11 / 15

Which unit measures electrical resistance?

ohms

volts

farads

12 / 15

Which unit measures pressure?

newtons

kilograms

pascals

13 / 15

Which unit measures frequency?

seconds

metres

hertz

14 / 15

Which unit measures electric potential difference?

amperes

volts

ohms

15 / 15

Which unit measures electric charge?

coulombs

ohms

farads

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Prefixes

1 / 15

What multiple of unit does micro (μ) have?

1 x 10^-3

1 x 10^-6

1 x 10 ^-9

2 / 15

What multiple of unit does kilo (k) have?

1 x 10³

1 x 10⁶

1 x 10 ⁹

3 / 15

What multiple of unit does milli (m) have?

1 x 10^-3

1 x 10^-6

1 x 10 ^-9

4 / 15

What multiple of unit does pico (p) have?

1 x 10^-9

1 x 10^-12

1 x 10 ^-15

5 / 15

What multiple of unit does mega (M) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

6 / 15

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

7 / 15

What multiple of unit does femto (f) have?

1 x 10^-15

1 x 10¹²

1 x 10 ¹⁵

8 / 15

What multiple of unit does nano (n) have?

1 x 10^-6

1 x 10^-9

1 x 10 ^-12

9 / 15

What multiple of unit does tera (T) have?

1 x 10⁹

1 x 10¹²

1 x 10 ¹⁵

10 / 15

What multiple of unit does centi (c) have?

1 x 10^-1

1 x 10^-2

1 x 10 ^-3

11 / 15

What multiple of unit does deci (d) have?

1 x 10^-1

1 x 10¹

1 x 10 ²

12 / 15

What is 100 MW in gigawatts?

10 GW

1 GW

0.1 GW

13 / 15

What is 3.2 cm in nanometres?

3.2 x 10^-3 nm

3.2x10⁷ nm

3.2 x 10^-9 nm

14 / 15

What is 300 μm in meters?

0.0003 m

0.003 m

0.03 m

15 / 15

What is 3 mT in femtoteslas?

3x10¹⁰ fT

3x10¹² fT

3x10¹⁵ fT

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Variables

1 / 10

Select the correct definition for the phrase "Independent Variable"

what is changed in an investigation

what is kept the same

what is measured

2 / 10

Select the correct definition for the phrase "Dependent Variable"

what is changed in an investigation

what is kept the same

what is measured

3 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

4 / 10

Identify the independent variable: Investigating the time taken for different sized balls to fall.

Time taken to fall

Size of ball

Gravitational Field Strength

5 / 10

Identify the dependent variable: Investigating the braking distance of different cars.

Type of car

Braking distance

Road surface

6 / 10

Identify the control variable: Investigating the boiling point of different liquids.

Boiling point of liquid

Type of liquid

Volume of liquid

7 / 10

Identify the a control variable: How does bulb brightness vary with bulb type?

Type of bulb

Light intensity of bulb

Power supplied to bulb

8 / 10

Identify the independent variable: How does the length of a wire affect the current in the circuit?

Type of wire

Length of wire

Current

9 / 10

Identify the independent variable: Investigating the absorption of gamma radiation by lead

Radiation Source

Thickness of Lead

Count rate of radiation

10 / 10

What is a fair test?

A fair test is when only the independent variable has been allowed to affect the dependent variable.

A fair is when you repeat the experiment until you have concurrent results.

A fair test is when results are taken three times and an average is found.

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Graphs

1 / 12

In the equation of a straight line, y = mx + c , select the letter that represents the gradient.

2 / 12

Select the graph that best represents the algebraic expression: y = b

3 / 12

Select the graph that best represents the algebraic expression: y = mx² + c

4 / 12

Select the graph that best represents the algebraic expression: y = mx^-1 + c

5 / 12

Select the graph that best represents a directly proportional relationship.

6 / 12

Calculate the gradient of the graph shown.

0.25

0.4

0.6

1.2

7 / 12

Calculate the gradient of the graph shown.

-1.28

-0.80

1.28

2.32

8 / 12

The area under this graph has a value of 100. Select the correct unit.

ms^-1

ms^-2

9 / 12

Calculate the area under the graph shown above.

67.5

87.5

104.5

10 / 12

Select the correct unit for the area under the graph

ms^-2

ms^-1

s^-1

11 / 12

Estimate the area under the graph shown above

0.047

0.094

0.192

192

12 / 12

Select the correct unit, derived from SI base units, for the estimated area under the graph.

Js^-1

As^-1

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Errors and Uncertainties

1 / 12

Select the missing word: _______ errors affect accuracy.

Random

Systematic

2 / 12

Select the missing word: _______ errors affect precision.

Random

Systematic

3 / 12

Which is not an action to reduce random errors in an investigation.

Calibrate apparatus by measuring a known value.

Take 3 repeats and calculate a mean.

Use equipment with an appropriate scale.

Use a computer/data logger where available.

4 / 12

A student measures the temperature of boiling water (100°C) with a thermometer with an uncertainty of ± 2°C. Select the range where the true value could be.

98°C - 100°C

99°C - 101°C

98°C - 102°C

100° - 102°C

5 / 12

How could you reduce percentage uncertainty?

Take multiple measurements and find an average.

Measure larger quantities.

Measure smaller quantities.

Use equipment with a larger uncertainty value.

6 / 12

A student places an item onto a balance in order to obtain its mass. They record the mass as 12.54 g. What’s is their absolute uncertainty for the mass reading?

± 0.01 g

± 0.02 g

± 0.1 g

± 0.125 g

7 / 12

A group of students time a ball bearing dropping through a tube of glycerol. They record the following times, in seconds: 9.2, 9.0, 8.9, 8.9 and 9.5. What is the uncertainty?

± 0.1 s

± 0.2 s

± 0.3 s

± 0.6 s

8 / 12

A ammeter with an uncertainty of ± 0.1 A displays a decrease in current from 7.2 A to 4.1 A, what is the difference in current?

3.1 ± 0.05 A

3.1 ± 0.1 A

3.1 ± 0.2 A

3.1 ± 0.31 A

9 / 12

The radius of a cheesecake in the staff room is 7.5 ±0.5 cm, what is the percentage uncertainty for the area of the cheesecake?

3.34%

6.67%

13.34%

44.49%

10 / 12

A mass of 3 ± 0.2kg is accelerated 10 ± 0.15 ms^-1. Calculate the force applied.

30 ± 1.50% N

30 ± 3.12% N

30 ± 8.17% N

30 ± 10.01% N

11 / 12

A ruler with an uncertainty of ± 0.5 mm measures the length of a Subway Footlong to be 292 mm, what is the uncertainty in the measurement.

± 0.50 mm

± 1.00 mm

± 2.00 mm

± 2.50 mm

12 / 12

Calculate the percentage uncertainty of line c (dashed).

4.3%

5.9%

11.4%

54.6%

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Decimal Places and Significant Figures

1 / 15

What is 84937 to 4 significant figures.

84900

84930

84940

85000

2 / 15

What is 1291 to 2 significant figures.

1000

1200

1290

1300

3 / 15

What is 40011 to 2 significant figures.

40000

40001

40010

40011

4 / 15

What is 1.7334 x 10³ to 3 significant figures.

1.70 x 10³

1.7 x 10³

1.73 x 10³

1.730 x 10³

5 / 15

What is 3.1415 to 1 significant figure.

3.1

3.10

3.14

6 / 15

What is 100.249 to 2 decimal places.

100.00

100.20

100.25

100.30

7 / 15

What is 4.9999 to 3 decimal places.

4.9900

4.9990

4.999

5.000

8 / 15

What is 0.0000176700 to 2 significant figures.

0.000017

0.0000177

0.000018

0.0000180

9 / 15

How many significant figures are in 103000?

10 / 15

How many significant figures are in 1994?

11 / 15

How many significant figures are in 0.056?

12 / 15

What is 74235.44 to 3 significant figures.

74000

74000.000

74200

74200.000

13 / 15

How many significant figures are in 4.00013?

14 / 15

What is 26.794 to 1 decimal places.

26.7

26.8

26.80

27.0

15 / 15

How many significant figures are in 100?

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Your score is

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