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

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

Radiation Source

Thickness of Lead

Count rate of radiation

2 / 10

Which unit measures electric charge?

coulombs

ohms

farads

3 / 10

A bullet of mass 4.02 g is fired at a speed of 940 ms^-1 from an SA-80 rifle. The bullet strikes a block of hardwood of mass 0.512 kg hanging at rest from a long string. The bullet enters the wood and becomes lodged in the block. Calculate the initial speed the wooden block from rest immediately after impact.

1.28 ms^-1

1.84 ms^-1

7.3 ms^-1

73.2 ms^-1

4 / 10

A nurse journeys through a hospital ward on a crash call. From a stationary position, he takes 16 seconds to complete the 60 m corridor. Calculate his acceleration.

0.47 ms^-2

1.88 ms^-2

3.75 ms^-2

7.50 ms^-2

5 / 10

Your phone charger supplies a current of 2.1 A and has a power rating of 6 W. What is the potential difference?

0.35 V

1.26 V

2.86 V

12.6 V

6 / 10

Which of these circuit symbols represents a thermistor?

7 / 10

Which graph best represents the resistance of an NTC thermistor?

8 / 10

A microwave runs off the mains in the U.K. and has an efficiency of 98%. Calculate how much electric charge will pass through the microwave per second if it transfers 1.31kJ of energy.

5.58 C

5.70 C

5.81 C

5.94 C

9 / 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

10 / 10

The wavelength of a standing wave on a string fixed at both ends is 35 cm at the sixth harmonic, what is the full length of the string?

0.7m

1.05 m

2.1 m

2.45 m

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

Which unit measures power?

watts

joules

volts

2 / 10

Which unit measures frequency?

seconds

metres

hertz

3 / 10

What multiple of unit does pico (p) have?

1 x 10^-9

1 x 10^-12

1 x 10 ^-15

4 / 10

What multiple of unit does femto (f) have?

1 x 10^-15

1 x 10¹²

1 x 10 ¹⁵

5 / 10

What is 100 MW in gigawatts?

10 GW

1 GW

0.1 GW

6 / 10

What is 3.2 cm in nanometres?

3.2 x 10^-3 nm

3.2x10⁷ nm

3.2 x 10^-9 nm

7 / 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

8 / 10

Select the missing word: _______ errors affect precision.

Random

Systematic

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 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

Select the SI unit for Energy.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

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

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 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.

5 / 10

The SI unit for a Newton is _______ .

kgs^-1

kgms^-1

kgms^-2

6 / 10

Marvin the Martian fires his gun horizontally at Bugs Bunny at a height of 60 cm. It fires at 550 ms^-1, but misses. Calculate how far away from Marvin the shot lands. g_Mars = 3.71 ms^-2

67.3 m

177.9 m

192.4 m

312.8 m

7 / 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

8 / 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

9 / 10

Which is the SI unit for acceleration?

ms^-1

ms^-2

m^-1

10 / 10

Achsa runs 1.2 km up at hill with a 40° incline in 438 seconds, calculate her horizontal displacement from her starting position.

536 m

638 m

771 m

919 m

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

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

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

4 / 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

5 / 10

The unit for power is the Watt, what is this in SI base units?

m²kgs^-2

m²kgs^-3

m kg s²

Js^-1

6 / 10

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

7 / 10

Which graph best represents the I-V characteristic graph of a filament lamp?

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

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

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 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

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

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

7 / 10

This graph shows the extension of 4 different springs, which spring is the stiffest?

8 / 10

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

9 / 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

10 / 10

Estimate k from the graph shown above.

3.75 Nm^-1

5 Nm^-1

37.5 Nm^-1

50 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 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

2 / 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

3 / 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

4 / 10

What is the technique used in ultrasound scanning?

Sonar

Pulse-Echo

US-Reflection

Transducing

5 / 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

6 / 10

Light passes from air through a glass container and into olive oil. Select the diagram that best shows this. Refractive indexes are as follows: glass = 1.52 and oil = 1.47

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

Light travels at 2.25x10⁸ ms^-1 in water, what is the refractive index of water?

0.75

1.33

1.59

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

Which wave is being described here: The motion of energy is along the same direction as the direction of travel.

Transverse Wave

Longitudinal Wave

Your score is

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