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

Momentum is a scalar quantity.

TRUE

FALSE

2 / 10

Chen Ruolin and Liu Huixia won Gold for China at the 2016 Rio Olympics for their synchronised 10 m platform dive. They have a mass difference of 9 kg but hit the water at the same time, which Newtonian Law applies, if any?

Newton's First Law

Newton's Second Law

Newton's Third Law

None

3 / 10

A school decided to go paintballing for staff team building. The Head of Science aims her paintball gun horizontally 1.6 m above ground at the Headteacher, launching the paintball at 92 ms^-1. She hits him on his thigh, 90cm from the ground. Calculate the distance away the Headteacher was stood. g_Earth = 9.81 ms^-1

34.8 m

39.4 m

52.5 m

65.7 m

4 / 10

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

Scalar

Vector

5 / 10

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

WA²

WA^-1

WA^-2

WA

6 / 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

7 / 10

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

Shorter

Longer

High amplitude

Low amplitude

8 / 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.

9 / 10

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

Focal length

Principal length

Lens length

Real length

10 / 10

Calculate the speed of a wave with a time period of 1x10^-3 s and a wavelength of 250 cm.

400 ms^-1

2500 ms^-1

4000 ms^-1

2.5x10⁵ ms^-1

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