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

What multiple of unit does tera (T) have?

1 x 10⁹

1 x 10¹²

1 x 10 ¹⁵

2 / 10

Select the best statement for Newton's 2nd Law

An object will remain at rest or at a constant velocity unless acted on by a resultant force.

The rate of change in momentum of a body is directly proportional to the resultant force applied.

An object will remain at rest unless acted on by a resultant force.

When two objects interact they will exert equal and opposite forces on each other.

3 / 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.

4 / 10

David walks 6 km west then 8 km north. Calculate his displacement.

6 km

8 km

10 km

14 km

5 / 10

What is Ɛ measured in terms of SI base units?

m² kg s^-3 A^-1

m² kg s^-2

J s^-1 A^-1

m^-1 kg s^-2

6 / 10

A smart phone has a charge flowing through it of 2 mC every 5 s. Calculate the current.

0.4 A

0.01 A

4x10^-3 A

1x10^-3 A

7 / 10

The ship, Queen Elizabeth 2, was a cruise ship from 1969-2008. She currently resides in Mina Rashid, Dubai as a floating hotel. When fully laden she held 70,327 tonnes and therefore displaces that weight of fluid when afloat. If the the density of seawater is 1024 kgm^-3, calculate the upthrust exerted on the ship when she was afloat fully laden. g = 9.81 NKg^-1

6.7x10⁵ N

6.9x10⁸ N

7.1x10⁸ N

7.1x10¹¹ N

8 / 10

Which material on the graph above is the strongest?

9 / 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

10 / 10

What is 84937 to 4 significant figures.

84900

84930

84940

85000

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 3.1415 to 1 significant figure.

3.1

3.10

3.14

2 / 10

Which is the SI unit for time?

hour

parsec

second

3 / 10

Which unit measures electric charge?

coulombs

ohms

farads

4 / 10

What multiple of unit does centi (c) have?

1 x 10^-1

1 x 10^-2

1 x 10 ^-3

5 / 10

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

Radiation Source

Thickness of Lead

Count rate of radiation

6 / 10

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

7 / 10

Calculate the gradient of the graph shown.

-1.28

-0.80

1.28

2.32

8 / 10

Select the missing word: _______ errors affect accuracy.

Random

Systematic

9 / 10

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.

10 / 10

Calculate the percentage uncertainty of line c (dashed).

4.3%

5.9%

11.4%

54.6%

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

A 75 N force is applied to the end of a spanner that is 25 cm long. Calculate the size of the moment?

1.875 Nm

18.75 Nm

187.5 Nm

1875 Nm

2 / 10

An Airbus A380 at maximum take-off weight, A_max = 575,000 kg, is taxing along at 37 km h^-1. The pilot isn't paying attention and accidently hits head on another A380 that is completely empty taxing at 40 km h^-1, A_min = 277,145 kg and they rebound off each other in opposite directions. If the collision reduces the speed of A_max to 6 ms^-1 then what speed is A_min now travelling at?

4 ms^-1

6 ms^-1

10 ms^-1

20 ms^-1

3 / 10

A mini-cannon of mass 35.5 kg fires a turnip of mass 1.2 kg. If the turnip leaves the cannon at 214 ms^-1 over 0.3 s, with what force does the mini-cannon recoil?

43 N

257 N

360 N

856 N

4 / 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.

5 / 10

The SI unit for a Newton is _______ .

kgs^-1

kgms^-1

kgms^-2

6 / 10

A man of 75 kg has an upward force applied to him of 735.75 N. Does he lift off the ground?

Can't tell from information given.

Yes

7 / 10

Estimate the velocity between 2 s and 6 s on the graph shown.

0.75 ms^-1

1.00 ms^-1

1.25 ms^-1

1.50 ms^-1

8 / 10

Which is the correct definition for acceleration?

The rate of change of an object's displacement.

The rate of change of an object's speed.

The rate of change of an object's velocity.

The rate of change of an object's speed, squared.

9 / 10

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

Scalar

Vector

10 / 10

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

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

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

V_out increases.

V_out decreases.

V_out remains constant.

3 / 10

Calculate the current at A₁ in the circuit shown.

0.21 A

0.51 A

0.79 A

1.37 A

4 / 10

Calculate the total resistance of the circuit shown.

0.69 Ω

4 Ω

8 Ω

16 Ω

5 / 10

An electric motor is used to raise a load. When the switch is closed, the ammeter reads 94 mA and the motor raises a 568 g load through a height of 174 cm in 25 seconds. Calculate the potential difference of the circuit assuming it is 100% efficient. g = 9.81 N kg⁻¹

9.7 V

36.8 V

103.1 V

109.7 V

6 / 10

Select the missing word: "The more charge carries available, the greater the current therefore the resistance ___________.

Increases

Decreases

Stays the same

Remains at zero

7 / 10

Connell's chain is made from silver which has a resistivity of 1.59 x10^-7 Ω m at 20 °C. It has a diameter of 4mm and a resistance of 0.71 Ω. What is the area inside the entire necklace when shaped in a perfect circle?

182 cm²

250 cm²

254 cm²

267 cm²

8 / 10

Which of the following options is the unit for resistivity?

Ωm

Ω²

Ωm²

9 / 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

10 / 10

The charge on an electron is 1.60x10^-19 C. Calculate how many electrons are needed to create a charge of 4.2 C.

1.42x10^-19

2.84x10^-19

2.63x10¹⁹

5.25x10¹⁹

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

A ball bearing of diameter 5.6 mm is dropped into a liquid which has a viscosity of 5.4 Pa s and a density of 1.38 kgL^-1. In the liquid, it reaches a terminal velocity of 0.023 ms^-1. Calculate the mass of the ball bearing. g=9.81 Nkg^-1

0.055 g

0.059 g

0.541 g

0.589 g

2 / 10

In order to calculate viscous drag (F), the equation above is used. What is a unit for η?

Nkg^-1

Nms^-1

Nkgm^-1

Nsm^-2

3 / 10

A unknown material under load 75 N incurs an extension of 2.1 mm. The original length of the material was 1.75 m and it has a diameter of 0.45 mm. Which material is it most likely to be?

Acrylic

Gold

Nickel

Tungsten

4 / 10

Which material on the graph above is the stiffest?

5 / 10

The graph above shows a fishing wire being extended by adding masses. Use the graph to estimate the elastic strain energy of the material.

9.7 J

10.0 J

19.4 J

32.3 J

6 / 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

7 / 10

A wire has a diameter of 0.5 mm and a breaking stress of the wire is 7.4x10¹⁰ Nm^-2. Calculate the mass that would break the wire. g = 9.81 ms^-2

1.5x10⁴ N

1.5x10⁶ N

3.7x10⁷ N

3.7x10⁸ N

8 / 10

Two springs attached in series extend by 5 cm when a load of F is applied to them. They have different constants of 76 Nm^-1 and 31 Nm^-1 respectively. Calculate the value of F.

1.1 N

2.7 N

5.4 N

10.6 N

9 / 10

What is another term for tensile deformation?

Extension

The Limit of Proportionality

Compression

The Elastic Limit

10 / 10

A meteor traveling through space has a k = 4.2x10⁶ Nm^-1 and a force of 5x10⁸ N. Calculate the extension of the meteor.

8.4x10^-3 m

8.4 m

11.9 m

119.0 m

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

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.

2 / 10

Select the missing word: "For ultrasounds, ________ wavelengths produce clearer images".

Shorter

Longer

High amplitude

Low amplitude

3 / 10

Fishermen use sonar to detect the depth of fish beneath the boat. On this occasion, the echo returned after 0.83 s. The speed of sonar waves through water is 1500 m s^-1. Calculate the depth of the fish.

180.7 m

553.3 m

1245 m

1807 m

4 / 10

Diffraction is an example of light behaving as a __________.

Particle

Wave

5 / 10

Calculate the critical angle for the boundary when light leaves a medium of refractive index 1.52 and enters air.

0.01°

0.65°

41.1°

65.7°

6 / 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

7 / 10

Identify the stationary wave pattern for a string at the fourth harmonic.

8 / 10

Select the correct pair of conditions necessary for sources of waves to be coherent.

Same wavelength with a phase relationship a time period apart.

Same frequency with a phase relationship a time period apart.

Same wavelength with a constant phase relationship T/2 apart.

Same frequency with a constant phase relationship

9 / 10

Polarisation only occurs with which type of waves?

Transverse Wave

Longitudinal Wave

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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