Advanced Physics 2: 2020 MCQ

Which row of the table shows a base quantity and its base SI unit?

• charge - C

• length - m

• mass - g

• temperature - °C

Which line of the table correctly identifies the process that would increase stability for nuclei in the positions indicated by X and Y?

• A

• B

• C

• D

When a force F is applied to a spring with stiffness k, the elastic potential energy stored is E. What is the elastic potential energy stored when a force 2F is applied to a spring with stiffness 2k?

• E/2

• E

• 2E

• 8E

There are several different methods that can be used to determine the distance from our solar system to astronomical objects. These include the measurement of red shift, trigonometrical parallax and the use of standard candles. Which row of the table shows a suitable method for each of the objects named?

• A

• B

• C

• D

A damped mass-spring system is driven into oscillation. The graph shows the amplitude of oscillation as the driving frequency is varied. The damping is decreased. Which row of the table describes what happens to the maximum amplitude of oscillation and the driving frequency at which this occurs?

• Maximum amplitude: decreases, Frequency at which maximum amplitude occurs: decreases

• Maximum amplitude: decreases, Frequency at which maximum amplitude occurs: increases

• Maximum amplitude: increases, Frequency at which maximum amplitude occurs: decreases

• Maximum amplitude: increases, Frequency at which maximum amplitude occurs: increases

A proton can be considered to be both a point charge and a point mass. There is an electric field and a gravitational field associated with the proton. Which of the following statements about the fields is not correct?

• Field strength is a vector.

• Potential is always less than 0.

• Potential is proportional to 1/(distance from proton)

• Field strength is proportional to 1/(distance from proton)^2

A pendulum of length l with a bob of mass m oscillates with frequency f. What is the frequency of a pendulum of length 4l with a bob of mass 2m?

• 4f

• 2f

• f

• f/2

Which of the following lenses would produce a real image of an object placed 15 cm away from the lens?

• converging, focal length = 10 cm

• converging, focal length = 20 cm

• diverging, focal length = 10 cm

• diverging, focal length = 20 cm

A student finds a Hertzsprung-Russell diagram in an old astronomy book and notices that the axes aren’t the same as in her current textbook. Which of the following graphs shows a correct alternative way to label the axes?

• A

• B

• C

• D

A detector is placed 30 cm from a gamma source, the count rate is 64 counts per minute. The detector is then placed 60 cm from the source. The background rate is presumed to be a constant 24 counts per minute.

• 16

• 32

• 34

• 44