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

Complete the sentence: "Acceleration is always __________ the resultant force."

in the opposite direction as

perpendicular to

in the same direction as

irrelevant to

2 / 10

A train leaves the station and accelerates at a constant rate, a. After time t its velocity is v. What was the trains velocity at 4t?

[1] √4 v

[2] 0.25 v

[3] v²

[4] 4v

3 / 10

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

6 km

8 km

10 km

14 km

4 / 10

The unit of resistance is the ohm. A correct alternative unit is:

VW^-2

WV^-2

V²W^-2

V²W^-1

5 / 10

A cell of e.m.f. 3.0 V and internal resistance 0.3 Ω is connected in a series with an ammeter reading 0.25 A and a motorised hula girl who dances when the circuit is complete. Calculate the power supplied by the cell.

0.71 W

0.73 W

0.75 W

0.77 W

6 / 10

Select the graph with the correct labels.

7 / 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

8 / 10

A stress-strain graph is shown above for an unknown material. Where on the curve would you mark the UTS point?

9 / 10

An inverted image is seen 3 times its original size when the object is placed 140 mm front of a convex lens. Calculate the focal length of the lens.

95 mm

105 mm

140 mm

420 mm

10 / 10

Select the wave with the smallest amplitude.

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 100.249 to 2 decimal places.

100.00

100.20

100.25

100.30

2 / 10

What is 40011 to 2 significant figures.

40000

40001

40010

40011

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 mega (M) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

5 / 10

What multiple of unit does centi (c) have?

1 x 10^-1

1 x 10^-2

1 x 10 ^-3

6 / 10

What multiple of unit does deci (d) have?

1 x 10^-1

1 x 10¹

1 x 10 ²

7 / 10

What is 300 μm in meters?

0.0003 m

0.003 m

0.03 m

8 / 10

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

Type of car

Braking distance

Road surface

9 / 10

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

10 / 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

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

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

2 / 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

3 / 10

The diagram shows a swing 1.43m long. Matilda has a mass of 35 kg and is released from rest at position A by Miss Honey. Calculate the speed of Matilda at position B.

1.94 ms^-1

3.75 ms^-1

6.5 ms^-1

14.1 ms^-1

4 / 10

Which of the following quantities has the same unit as the rate of change of momentum?

energy

weight

work

acceleration

5 / 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.

6 / 10

The complete Harry Potter collection in paperback has a mass of 3.4 kg. The book collection is placed on a sloping table at angle θ and is at rest. The maximum frictional force between the tabletop and the book collection is 17.7 N.

Calculate the minimum angle at which the book collection will slip. g = 9.81 Nkg^-2.

31°

48°

57°

59°

7 / 10

Select the graph which best fits the motion of a pogo stick being bounced on at regular intervals.

8 / 10

A bus is slowing down to stop at a bus stop. Select the graph which shows best describes it's motion.

9 / 10

A shotput is launched on sports day by the strongest Y7. She throws it at an angle of 30° at a speed of 18 ms^-1, releasing it at a height of 1.9 m. Calculate how far she throws it. g_Earth = 9.81 ms^-2

1.72 m

2.98 m

18.23 m

31.58 m

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

Select a use for this circuit in fluctuating light conditions. Assume V_out is the location of external circuitry

A fan to switch on in warm temperatures.

Street lights to switch on in darkness.

Operate a heater in a reptile house.

A speaker that operates upon sunrise.

2 / 10

Select a use for this circuit in fluctuating light conditions. Assume V_out is the location of external circuitry

A fan to switch on in warm temperatures.

Street lights to switch on in darkness.

Operate a heater in a reptile house.

A speaker that operates upon sunrise.

3 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

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

Calculate the total resistance of the circuit shown.

0.62 Ω

1.6 Ω

5 Ω

15 Ω

6 / 10

Calculate the total resistance of the circuit shown.

0.69 Ω

4 Ω

8 Ω

16 Ω

7 / 10

Which graph best represents the I-V characteristic graph of a metallic conductor at a constant temperature?

8 / 10

How should you connect a potential difference measuring piece of equipment in a circuit?

It doesn't need connecting to the circuit.

In parallel to the battery.

In parallel to the component you want to know the potential difference over.

In series.

9 / 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

10 / 10

Calculate the current in a circuit when the charge is 24 C over 6 seconds.

2 A

4 A

6 A

8 A

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

When the temperature increases, what is the effect on fluids' viscosities?

Gases become less viscous, liquids become more viscous.

Gases become more viscous, liquids become less viscous.

Gases and liquids become less viscous.

Gases and liquids become more viscous.

2 / 10

A steel ball bearing is dropped into a fluid and travels 60 cm in 2.53 s. The diameter of the ball bearing is 6 mm and its mass 15.3 g. Calculate the viscosity of the fluid. g=9.81 Nkg^-1

1.1 Pa s

5.6 Pa s

11.2 Pa s

56.0 Pa s

3 / 10

A copper wire of diameter 0.6 mm, X, is joined in series to the end of another copper wire of diameter 0.125 mm, Y. Both wires are 80 cm in length when no load is applied. A 15 N load is hung on the end of the wires as shown in the diagram below. If the Young's Modulus of copper is 128 GPa, calculate the extension for each wire.

ExtensionX = 0.3 mm, ExtensionY = 7.6 mm

ExtensionX = 0.4 mm, ExtensionY = 9.5 mm

ExtensionX = 1.4 mm, ExtensionY = 1.6 mm

ExtensionX = 2.3 mm, ExtensionY = 11.9 mm

4 / 10

When investigating Young's modulus, why should you use a long wire?

To help maintain social distancing.

To reduce the absolute uncertainty in your measurements.

To reduce the percentage uncertainty in your measurements.

To reduce random errors.

5 / 10

What is the units for Young's modulus in terms of SI units?

kg m^-2

kgm^-1s^-1

kgm^-1s^-2

kgm^-2s^-3

6 / 10

A copper wire has a length of 25 cm and a force of 400 N is applied to the wire, which causes it to stretch to 28.9 cm. Calculate the elastic strain energy stored in the wire.

7.8 J

15.6 J

78 J

156 J

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

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

9 / 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.

10 / 10

Under a 4 N force, two identical springs, in parallel, stretch 130 mm. Calculate the spring constant for one of the springs.

7.7 Nm^-1

15.4 Nm^-1

30.7 Nm^-1

61.5 Nm^-1

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 work function of an unknown metal is 1.2 eV. Light with energy 3 eV is incident on its surface, calculate the wavelength of the light.

6.63x10^-26 m

7.24x10^-14 m

4.14x10^-7 m

4.52x10³³ m

2 / 10

What is the effect on the emission of electrons the frequency of the incident light was increased?

More electrons are emitted from the surface of the metal

Nothing

The same amount of electrons will be emitted from the surface of the metal but with a greater kinetic energy.

Less electrons will be emitted from the surface of the metal but with a greater kinetic energy.

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

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

What is the technique used in ultrasound scanning?

Sonar

Pulse-Echo

US-Reflection

Transducing

6 / 10

What is the name of distance between the lens and the principal focus?

Focal length

Principal length

Lens length

Real length

7 / 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°

8 / 10

Two coherent, in phase waves have a path difference of 3λ. What kind of interference occurs?

Constructive interference

Destructive interference

None

9 / 10

Polarisation only occurs with which type of waves?

Transverse Wave

Longitudinal Wave

10 / 10

Soumya plays a note of wavelength 25 cm on her synthesiser. She knows the speed of sound is 340 ms^-1 in air. Calculate the frequency.

13.6 Hz

85 Hz

1360 Hz

8.5 kHz

Your score is

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