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

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

3 / 10

Select the SI unit for Work.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

4 / 10

A flask of coffee is knocked horizontally from the roof of a car 1.45 m off the ground at 14 ms^-1. Calculate how long it takes to reach the ground. g_Earth = 9.81 ms^-2

0.10 s

0.21 s

0.30 s

0.54 s

5 / 10

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

CΩ^-1s^-1

ΩC^-1s^-1

CΩs

CΩs^-1

6 / 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

7 / 10

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

It doesn't need connected to the circuit.

In parallel to the battery.

In parallel to the component you want to know the current through.

In series.

8 / 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

9 / 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

10 / 10

Why is gel added to a patient's skin when using ultrasound?

Makes the ultrasound transducer easier to slide over skin.

Prevents air entering between the transducer and skin blocking the ultrasound waves entering the body.

Makes the skin cold and reduces the interference from infrared radiation.

Prevents air entering between the transducer and skin reflecting away the ultrasound waves entering the body.

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 1994?

2 / 10

What is 1291 to 2 significant figures.

1000

1200

1290

1300

3 / 10

Which is the SI unit for temperature?

kelvin

celsius

fahrenheit

4 / 10

What multiple of unit does femto (f) have?

1 x 10^-15

1 x 10¹²

1 x 10 ¹⁵

5 / 10

What multiple of unit does nano (n) have?

1 x 10^-6

1 x 10^-9

1 x 10 ^-12

6 / 10

What is 3 mT in femtoteslas?

3x10¹⁰ fT

3x10¹² fT

3x10¹⁵ fT

7 / 10

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

Type of car

Braking distance

Road surface

8 / 10

Select the graph that best represents a directly proportional relationship.

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

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

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

Select the SI unit for Energy.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

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

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

4 / 10

Select one way to increase the terminal velocity of an object.

Increase the frictional force.

Increase the driving force.

Decrease the driving force.

Increase the mass of the object.

5 / 10

Select the best statement for Newton's 3rd Law:

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

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.

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

6 / 10

What is the vertical component if F is applied at θ to the horizontal.

7 / 10

A Y7 drags behind them their cooking, PE kit and textbooks behind them with a force of 676 N and an angle of 30°. Calculate the vertical component of the force.

247 N

338 N

585 N

923 N

8 / 10

A fishing boat travels at 4.6 ms^-1 200° from North towards Whitehaven Harbour Gates, which are 9.4 km away. The boat reaches the harbour, stops and the captain get on her bike and cycles due West from the Harbour Gates at 20 kmph for 25 minutes. Calculate her total displacement.

5.12 km

8.33 km

10.21 km

17.73 km

9 / 10

A house attached to lots of balloons takes flight at 5.20 ms ^-1 and, due to a cross wind, at an angle of 56° from the horizontal. What would it's vertical speed be assuming there was no wind.

1.59 ms^-1

2.91 ms^-1

4.31 ms^-1

8.11 ms^-1

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

A battery of e.m.f. 1.5 V with an internal resistance of 0.5 Ω is connected in series to a 5 Ω resistor. Calculate the current in the circuit.

0.12 A

0.25 A

0.4 A

3.6 A

2 / 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

3 / 10

A battery of e.m.f. 7 V is connected across a 42 Ω resistor. If the potential difference across the resistor is 6 V, calculate the internal resistance of the cell.

6 A

7 A

8 A

9 A

4 / 10

Which of these circuit symbols represents a thermistor?

5 / 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

6 / 10

Which graph best represents the I-V characteristic graph of a NTC thermistor?

7 / 10

A resistor in a circuit has a current through it of 0.20 A when the potential difference across it is 15 V. Calculate the resistance of the resistor.

0.013 Ω

3 Ω

75 Ω

130 Ω

8 / 10

The unit for potential difference is Voltage, what is this in SI base units?

m² kg s^-3 A^-1

A s

J s^-1 A^-1

9 / 10

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

It doesn't need connected to the circuit.

In parallel to the battery.

In parallel to the component you want to know the current through.

In series.

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 undertaking practical work to measure the viscosity of liquid, why should the marker the signifies timer start be approximately halfway down the tube?

To reduce the percentage error.

To reduce the human error.

To allow the ball bearing to reach terminal velocity.

All of the above.

2 / 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

3 / 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

4 / 10

Stress and strain are used to calculate the Young's modulus of a material up to its _____________.

elastic limit.

limit of proportionality.

yield point.

breaking point.

5 / 10

A 500 mm material undergoes a strain of -3.2%, when measured what is the materials length?

484 mm

492 mm

508 mm

516 mm

6 / 10

Which material on the graph above is the weakest?

7 / 10

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

8 / 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

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

A spring extends by 12 cm when a mass of 87 g is attached to it. Calculate the spring constant. g = 9.81 ms^-2

0.01 Nm^-1

0.10 Nm^-1

1.02 Nm^-1

10.24 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 h in E = hf represents:

Number of photons

Planck constant

Boltzmann constant

Intensity of light

2 / 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

3 / 10

Select the correct description of an absorption line spectrum.

Continuous dull spectrum with white lines across it.

Continuous dull spectrum with dark lines across it.

Continuous bright spectrum with white lines across it.

Continuous bright spectrum with dark lines across it.

4 / 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.

5 / 10

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

Shorter

Longer

High amplitude

Low amplitude

6 / 10

Light of wavelength 7.12x10^-7 m is incident on a diffraction grating with a line spacing of 1.89x10^-6 m. Calculate the angle from the normal to the 2nd order maximum.

13.2°

22.1°

48.9°

63.4°

7 / 10

The refractive index of glass is 1.52, what speed does light travel through it?

1.97x10⁸ ms^-1

2.97x10⁸ ms^-1

3x10⁸ ms^-1

4.56x10⁸ ms^-1

8 / 10

Calculate the intensity of a wave of power 1.6 KW and falling on an area of 2.1×10⁴ m²?

0.131 Wm^-2

0.762 Wm^-2

0.076 Wm^-2

1.31 Wm^-2

9 / 10

Mark reads the back label of his microwave oven, it says frequency = 2450 MHz. Calculate the wavelength.

12.2 cm

73.5 cm

1.22 m

122 m

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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