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

Select the missing word: _______ errors affect precision.

Random

Systematic

2 / 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

3 / 10

Why do objects (in a medium) not achieve terminal velocity instantly?

The upward force is larger than the downward force so there is a resultant force upward.

The opposing force needs time to build up and oppose.

The acting forces need time to balance.

The downward force is larger than the upward force so there is a resultant force downward.

4 / 10

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

5 / 10

A cyclist has a constant negative acceleration as approaches a café. She takes 5.5 seconds to come to a complete stop and travels 26 m. Calculate her initial speed.

4.73 ms^-1

9.54 ms^-1

11.96 ms^-1

143.00 ms^-1

6 / 10

Calculate the current at A₁ in the circuit shown.

0.13 A

1.37 A

2.05 A

2.93 A

7 / 10

Copper has a resistivity of 1.724x10^-8 Ω m at 20 °C. Calculate the resistance of a piece of copper wire that measures 40 cm long and has a diameter of 0.8 mm.

0.0034 Ω

0.0137 Ω

0.343 Ω

1.372 Ω

8 / 10

In the context of electrons in atoms, what is excitation?

Enough energy is absorbed by an electron causing it to move to a higher energy level.

Enough energy is absorbed by an electron causing it to break free of the atom.

Enough energy is absorbed by an atom causing it to release all its electrons.

Enough energy is absorbed by an atom causing all its electrons to move up an energy level.

9 / 10

Why is cladding is required in fibre optics?

Avoid the loss of signal

Required to ensure total internal reflection

Protect the cable from damage

All of the above

10 / 10

Polarisation only occurs with which type of waves?

Transverse Wave

Longitudinal Wave

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

What is 0.0000176700 to 2 significant figures.

0.000017

0.0000177

0.000018

0.0000180

2 / 10

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

3 / 10

Which is the SI unit for current?

volts

ampere

joule

4 / 10

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

lux

pascals

candela

5 / 10

What multiple of unit does milli (m) have?

1 x 10^-3

1 x 10^-6

1 x 10 ^-9

6 / 10

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

7 / 10

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

Radiation Source

Thickness of Lead

Count rate of radiation

8 / 10

Select the missing word: _______ errors affect accuracy.

Random

Systematic

9 / 10

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

10 / 10

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

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

This diagram shows the direction of force for four students pushing on a door at different distances from the hinge, d_pivot. Which student is applying the greatest moment?

2 / 10

The diagram shows Harry and Dudley on a see-saw. Harry is sat 120 cm away from the pivot. How far away from the pivot must Dudley sit to balance with Harry?

46 cm

55 cm

46 m

55 m

3 / 10

A VW campervan cruises along a straight, flat Autobahn at a speed of 130 kmh^-1. The total resistive force, due to air resistance, is 900 N.

If the overall efficiency of the campervan is 18%, calculate the energy obtained from its fuel during 42 km journey.

3.25x10⁷ J

5.85x10⁷ J

1.23x10¹⁰ J

6.81x10¹⁰ J

4 / 10

Sheffield is famous for its snooker. A 170 g white ball is struck with a cue and travels along the snooker table at 12 ms^-1. Calculate it's momentum.

2.04 kg ms^-1

204 kg ms^-1

2040 kg ms^-1

5 / 10

A mass of 3 kg is hung on a forcemeter then dropped from the top of a building 10m high. Select the reading shown on the balance while the mass and the balance are falling together. g = 9.81 ms^-2.

0 N

3 N

29 N

294 N

6 / 10

The SI unit for a Newton is _______ .

kgs^-1

kgms^-1

kgms^-2

7 / 10

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

8 / 10

A climber falls from a rock face and accelerates due to gravity for 3 seconds before his rope stops his fall. What distance did he fall?

14.7 m

29.4 m

44.1 m

88.3 m

9 / 10

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

Scalar

Vector

10 / 10

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

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 power is the watt. A correct alternative unit is:

VCs^-1

Ω²V^-2

V²Ω

V²Ω^-2

2 / 10

The unit of potential difference is the volt. A correct alternative unit is:

CΩ^-1s^-1

ΩC^-1s^-1

CΩs

CΩs^-1

3 / 10

Select effect on V_out when the light intensity increases on this circuit.

V_out increases.

V_out decreases.

V_out remains constant.

4 / 10

Select the effect on V_out when the surrounding temperature decreases for circuit

V_out increases.

V_out decreases.

V_out remains constant.

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

The electromotive force, or e.m.f. (Ɛ), is measured in which unit?

Joules

Volts

Newtons

Coulombs

8 / 10

Which graph best describes Ohm's law?

9 / 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

10 / 10

Which piece of equipment can be used to measure the potential difference in a circuit?

Ammeter

Voltmeter

Luxmeter

Newton Meter

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

A 4.2 g balloon is inflated with 1.8 g of air until it is 1.4x10^-3 m³ in volume. Calculate the density of the inflated balloon.

1.3 kgm^-3

3.0 kgm^-3

4.3 kgm^-3

8.4 kgm^-3

4 / 10

The Young's Modulus for a single walled carbon fibre nanotubes of diameter 4 nm is 1000 GPa. If it is placed under 75% strain, what force is required to break it?

3.8x10^-6 N

9.4x10^-6 N

3.8x10³⁰ N

9.4x10³⁰ N

5 / 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

6 / 10

Which material on the graph above is the strongest?

7 / 10

A wire of 1.2 m extends a 3 mm when a load of 20 N is applied to it. Calculate it's strain.

2.5x10^-3 Nm^-2

2.5x10^-3

0.4 Nm^-2

0.4

8 / 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.

9 / 10

What is the relationship between the force applied, F, and the extension, x of a material that obeys Hooke's Law?

F = x

F ∝ x

F ≈ x

F = x ^-1

10 / 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.

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

Which is the correct chronological of discoveries from these scientists?

Newton, Planck, Hertz and Hallwachs, Young

Young, Newton, Planck, Hertz and Hallwachs

Newton, Young, Planck, Hertz and Hallwachs

Newton, Young, Hertz and Hallwachs, Planck

2 / 10

The wavelength of the electrons can be measured by diffraction. An electron gun accelerates electrons into a beam, these were diffracted and upon diffraction the wavelength was found to be 1.23×10^-9m. Calculate the potential difference used to accelerate the electrons from rest into a beam.

1.59x10^-19 V

3.89x10^-5 V

0.997 V

5.91x10⁵ V

3 / 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

4 / 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

5 / 10

An image of a perfectly circular object of radius 25.8 cm is projected onto a screen. The object is also perfectly circular and has an area of 16.3 cm. Calculate the magnification on the lens.

1.58

5.24

32.6

128.9

6 / 10

Light travelling through air is incident on glass at an angle of 23°. The refractive index of the glass is 1.52. Calculate the angle of refraction.

0.3°

14.9°

23.0°

25.7°

7 / 10

The speed of light in the core of a fibre optic cable is 2.04x10⁸ ms^-1. Calculate the refractive index.

0.68

1.27

1.47

8 / 10

Two points on a wave have a phase difference of 1080°, are they in phase?

Yes

No - they are out of phase

No - they are exactly out of phase

9 / 10

A sound wave of wavelength 0.332 m has a time period of 10^-3s. If the time period is decreased to 10^-4 s. Calculate the wavelength of the new wave.

0.332 cm

3.32 cm

33.2 cm

333 cm

10 / 10

Select on the diagram which arrow represents the wavelength of the wave.

Your score is

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