Physics Random Retrieval Y12

Physics Year 12 Random Retrieval

This quiz contains all the questions in the Physics Year 12 section. The website will pick 10 questions at random.

1 / 10

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

2 / 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

3 / 10

Select the correct definition for the phrase "Dependent Variable"

what is changed in an investigation

what is kept the same

what is measured

4 / 10

A rugby player accelerates steadily from rest at 1.82 ms^-2 for 4 seconds. Calculate their final speed.

2.70 ms^-1

3.79 ms^-1

7.28 ms^-1

15.16 ms^-1

5 / 10

A scuba diver surfaces after a dive. She begins to swim towards the boat at a constant speed of 67 cms^-1 and due to a current in the water this takes her 70 seconds an an angle of 32°. Calculate the time taken if there was no current at the same speed.

40 s

47 s

59 s

67 s

6 / 10

Select if the following is a scalar or a vector: mass

Scalar

Vector

7 / 10

The graph above shows a wire being extended by adding masses. Estimate from the graph the Young's modulus.

0.67 Jm^-3

1.50 Jm^-3

192 Jm^-3

384 Jm^-3

8 / 10

The h in E = hf represents:

Number of photons

Planck constant

Boltzmann constant

Intensity of light

9 / 10

Electrons can show can show wave light properties.

TRUE

FALSE

10 / 10

Which sentence is true of ultrasound transducers?

The pulses must be long and the gaps between pulses must be short.

The pulses must be short and the gaps between pulses must be long.

The pulses and the gaps between pulses must be the same duration.

Your score is

Working as a Physicist Random Retrieval

This quiz contains all the questions in the Working as a Physicist section. The website will pick 10 questions at random.

1 / 10

How many significant figures are in 103000?

2 / 10

Which unit measures frequency?

seconds

metres

hertz

3 / 10

What multiple of unit does kilo (k) have?

1 x 10³

1 x 10⁶

1 x 10 ⁹

4 / 10

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

5 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

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

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

ms^-1

ms^-2

8 / 10

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

Js^-1

As^-1

9 / 10

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

10 / 10

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.

Your score is

Mechanics Random Retrieval

This quiz contains all the questions in the Mechanics section. The website will pick 10 questions at random.

1 / 10

You're down the allotment and are carrying your 65 kg Nana in a 20kg wheelbarrow. Your Nana's and the wheelbarrow's weight acts 60 mm from the centre of the wheel. What force do you need to apply to the end of the handle, 1.2 m from the centre of the wheel, to move your Nana about? g = 9.81 ms^-2

9.8 N

31.9 N

41.7 N

50.3 N

2 / 10

If an object is on its pivot, what can be said about the moments?

The total clockwise moment about the pivot is greater than the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is less than the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is equal to the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is twice as large as the total anticlockwise moment about the pivot.

3 / 10

The Soyuz (Russian: Сою́з) descent module, of mass 2900 kg, re-enters the atmosphere at an angle of 1.35° to the horizontal, and travels 4200 km until it reaches 10.7 km before deploying it's parachutes. Calculate the change in E_g from the point of atmospheric re-entry to parachute deployment.

2.5x10⁶ J

2.5x10⁹ J

1.2x10¹¹ J

1.2x10⁸ J

4 / 10

Select the SI unit for Power.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

5 / 10

Select the missing phrase. "A joiner uses a hammer to hit a nail into wood. When the hammer strikes the nail, _____________

the nail exerts an equal force back on the hammer and doesn't move.

the nail exerts an equal force back on the hammer and moves into the wood.

the nail exerts a force proportional to its size back on the hammer and doesn't move.

the nail exerts a force proportional to its size back on the hammer and moves into the wood.

6 / 10

A mug of tea (T_m) is at rest on a table. Select the correct pairing of forces.

Gravitational force pulls (T_m) towards the table. (T_m) pushes on the table in the opposite direction.

(T_m) pushes on the table. The table pushes back on (T_m) in the opposite direction.

(T_m) pulls the table towards it with gravitational force. The table pushes back on (T_m) in the opposite direction.

(T_m) pushes on the table. The table is pulled down by gravitational force.

7 / 10

Select the correct graph for these values shown of an animal stalking its prey.

8 / 10

Select the statement that best describes the motion of object as shown in the graph above.

Object is travelling at constant velocity.

Object is stationary.

Object is accelerating constantly.

Object is changing acceleration.

9 / 10

Which image sequence best shows the motion of a iPhone being dropped from rest?

10 / 10

Select if the following is a scalar or a vector: velocity

Scalar

Vector

Your score is

Electric Circuits Random Retrieval

This quiz contains all the questions in the Electric Circuits section. The website will pick 10 questions at random.

1 / 10

The unit of charge is the coulomb. A correct alternative unit is:

JAΩ

JA^-1Ω^-1

JAΩ^-1

JA^-1Ω

2 / 10

The unit of current is the ampere. A correct alternative unit is:

JΩC^-1

J^-1ΩC

JΩ^-1C^-1

JΩ^-1C

3 / 10

The unit of current is the ampere. A correct alternative unit is:

VΩ

VΩ^-1

V^-1Ω^-1

ΩV^-1

4 / 10

Calculate the current at A₁ in the circuit shown.

0.21 A

0.51 A

0.79 A

1.37 A

5 / 10

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₃.

1 A

2 A

3 A

4 A

6 / 10

A battery with internal resistance 0.4 Ω and an e.m.f. of 15 V powers a portable speaker with a resistance of 9 Ω. Calculate the voltage across the speaker when it is being used.

13.4 V

14.4 V

15.3 V

15.9 V

7 / 10

Which of these expressions is not a correct expression for calculating the electrical power of a circuit?

Expression A

Expression B

Expression C

Expression D

8 / 10

A 50 Ω resistor in an electric circuit has a potential difference across it of 20 V. Calculate the current through the resistor.

0.4 A

1 A

2.5 A

1 kA

9 / 10

In this diagram, what should the potential difference of the missing value be?

2 V

4 V

8 V

0 V

10 / 10

The current in a circuit depends on the mean drift velocity of the charge carriers. This can be defined by this equation, what is the current if the mean drift velocity of charge carriers halves?

I/2

I²

Your score is

Materials Random Retrieval

This quiz contains all the questions in the Materials section. The website will pick 10 questions at random.

1 / 10

HMS Astute is a nuclear-powered submarine in service with the Royal Navy, she can dive to depth of 300 m in seawater of density 1024 kgm^-3. If the pressure inside the submarine is kept at sea level (1.01x10⁵ Pa), calculate the resultant force on a section of the hull of area 20 m² at her maximum depth.

2.1x10⁸ N

3.4x10⁸ N

5.8x10⁸ N

6.0x10⁸ N

2 / 10

When a ball bearing is dropped through a liquid of unknown viscosity, the sum of all the forces equal ___________.

Zero

The overall weight.

The overall drag.

The overall upthrust

3 / 10

The graph above shows a wire being extended by adding masses. Estimate from the graph the Young's modulus.

0.67 Jm^-3

1.50 Jm^-3

192 Jm^-3

384 Jm^-3

4 / 10

What is Young's modulus a measure of?

The ductility of a material.

The tensile strength of a material.

The stiffness of a material.

The brittleness of a material.

5 / 10

A wire has a diameter of d and a when a force of F is applied, it breaks at σ. What would the value of σ be if the diameter was halved?

^F/₂

^4F/_A

^F/_2A

^AF/₂

6 / 10

When plotting a force extension graph for the loading and unloading of a material, when would the unloading line not pass through the origin?

When the limit of proportionality has been passed.

When the elastic limit has been passed.

When a metallic material is used.

When synthetic material is used.

7 / 10

What is another term for tensile deformation?

Extension

The Limit of Proportionality

Compression

The Elastic Limit

8 / 10

At which point on the graph shown above is the elastic limit?

9 / 10

Two nichrome wires, A and B, have a load of 30 N placed on them each. The original lengths of the wires are 3 m and 2 m. Each wire shows the same extension. Find the ratio of A_k to B_k.

1 : 1

3 : 2

1.5 : 1

Unable to calculate from information given.

10 / 10

If the deformation of the material is plastic, the material __________.

is plastic.

will shear under high loads.

will not return to its original shape.

will return to its original shape.

Your score is

Waves & the Nature of Light Random Retrieval

This quiz contains all the questions in the Waves & the Nature of Light section. The website will pick 10 questions at random.

1 / 10

The electromagnetic spectrum is an example a ____________.

Transverse wave

Longitudinal wave

2 / 10

For the first electron to be liberated from a helium atom 24.6 eV of energy is required. Calculate the frequency of light needed.

2.70 x10^-35 Hz

5.94x10¹⁵ Hz

1.68x10¹⁶ Hz

3.71x10³⁴ Hz

3 / 10

What happens when a ultrasound wavelength meets an interface in the body?

The ultrasound waves are reflected.

The ultrasound waves are transmitted.

Some ultrasound waves are reflected and some are transmitted.

Some ultrasound waves are absorbed by body tissue and the rest are scattered.

4 / 10

Complete the sentence: "When waves pass from one medium to another, if the mediums have similar densities then most of the energy is ____________."

reflected

absorbed

scattered

transmitted

5 / 10

Which one of the following types of wave can't be polarised?

gamma

ultraviolet

infrared

ultrasonic

6 / 10

Reducing the width of a single slit that has monochromatic light passing through affects the central maximum, how?

The width and intensity both increase

The width and intensity both decrease

The width is unchanged but intensity decreases

The width increases but the intensity decreases

7 / 10

A lens has a focal length of 4.8 cm. Calculate the lens' power.

0.21 D

2 D

4.8 D

8.3 D

8 / 10

Which diagram represents a concave lens?

9 / 10

Which lens causes light to diverge?

Convex

Concave

10 / 10

Calculate the speed of a wave with a frequency of 10 kHz and a wavelength of 2 m.

0.2 ms^-1

5 ms^-1

20 ms^-1

20 kms^-1

Your score is

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