Physics HL

Question 1

1. 2X + Y
2. X – 2Y
3. \frac{3Y}{X}
4. 4XY

Question 2

Question 3

Which free-body diagram correctly represents the forces acting on the biker from the moment she stops pedalling to the moment she comes to rest?

Question 4

1. 2.5 m s^{-1}
2. 5.0 m s^{-1}
3. 10 m s^{-1}
4. 50 m s^{-1}

Question 5

1. M\left (\frac{v^{2}}{R}-\frac{\sqrt{3}}{2}g\right ) 
2. M\left (\frac{v^{2}}{R}+\frac{\sqrt{3}}{2}g\right ) 
3. M\left (\frac{v^{2}}{R}-\frac{1}{2}g\right ) 
4. M\left (\frac{v^{2}}{R}+\frac{1}{2}g\right )

Question 6

What is true about the horizontal distance travelled by each object and the time taken for the objects to reach the ground?

Question 7

1. 4.8 \times 10^{22}
2. 4.8 \times 10^{23}
3. 4.8 \times 10^{24}
4. 4.8 \times 10^{25}

Question 8

What is the new volume of the balloon?

1. V
2. 2V
3. 4V
4. 16V

Question 9

1. its temperature decreases.
2. the mean potential energy of the water molecules decreases.
3. the mean kinetic energy of the water molecules decreases.
4. the mean thermal energy of the water molecules decreases.

Question 10

1. 1 cm
2. 2 cm
3. 4 cm
4. 8 cm

Question 11

What changes in d and the colour of the light will definitely cause the value of b to decrease?

Question 12

1. Zero
2. \frac{\pi}{4}
3. \frac{\pi}{2}
4. \pi

Question 13

What is the resultant intensity at M?

1. I
2. 2I
3. 3I
4. 5I

Question 14

1. Left
2. Right
3. Downwards
4. Upwards

Question 15

1. 2 \Omega
2. 4 \Omega
3. 6 \Omega
4. 8 \Omega

Question 16

Question 17

1. 2L
2. 8L
3. 16L
4. 32L

Question 18

What is the diameter of Moon B?

1. 2\sqrt{3}R
2. 4\sqrt{3}R
3. 12R
4. 24R

Question 19

What should be the new orbital period of the satellite in order for its acceleration to remain a?

1. \sqrt{2}T
2. 2T
3. \sqrt{3}T
4. 3T

Question 20

A \rightarrow B + 2\alpha + 4\beta^{-}

Which of the following statements is not true about A and B?

1. B is an isotope of A.
2. The nucleon number of B is smaller than the nucleon number of A.
3. B has the same number of protons as A.
4. B has the same number of neutrons as A.

Question 21

1. evidence from emission and absorption spectra.
2. the Rutherford-Geiger-Mardsen scattering experiment.
3. observations related to the wave nature of light.
4. the neutron-to-proton ratio of stable elements.

Question 22

I. The most stable elements are found around the maximum point of the graph.

II. Larger Z means more energy is needed to disassemble the given nucleus

III. Total binding energy is proportional to the atomic number

1. I and II only
2. I and III only
3. II and III only
4. I, II and III

Question 23

What is the albedo of the forest?

1. 0.20
2. 0.28
3. 0.70
4. 0.72

Question 24

1. reduce the number of neutrons that are available for further fission.
2. convey energy from the reactor to the turbines.
3. slow down neutrons.
4. contain the reactor core.

Question 25

Two photovoltaic panels, A and B, are in the shape of a circle. The radius of A is R and its efficiency is 30%. The radius of B is 2R and its efficiency is 10%.  Panel A is exposed to 6 hours of sunshine per day.

How many hours of sunshine should panel B be exposed to in order for the two panels to produce the same amount of energy per day?

1. 4.5
2. 6
3. 9
4. 10.5

Question 26

Given that sin(30^{o}) = 0.5, what is the wavelength of the light?

1. 700 nm
2. 600 nm
3. 500 nm
4. 400 nm

Question 27

What is the new mass and the new angular speed?

Question 28

What changes to the width of the slit and to the colour of the light will definitely decrease the diffraction angle?

Question 29

What is the period of the pendulum?

1. \pi 
2. 2\pi 
3. 4\pi 
4. 8\pi 

Question 30

1. Alpha particle
2. Electron neutrino
3. Positron
4. Muon

Question 31

1. The speed of the satellite decreases when it moves from orbit A to orbit B.
2. The total energy of the satellite is smaller in orbit A than in orbit B.
3. The gravitational potential energy of the satellite is larger in orbit A than in orbit B.
4. The gravitational potential energy of the satellite is zero when it is stationary on the surface of the planet.

Question 32

1. P
2. Q
3. R
4. S

Question 33

1. 2.0 mV
2. 4.0 mV
3. 2.0 V
4. 4.0 V

Question 34

Question 35

1. \frac{5C}{7}
2. \frac{7C}{5}
3. \frac{3C}{7}
4. \frac{7C}{3}

Question 36

1. 0.2 V
2. 0.4 V
3. 2 V
4. 4 V

Question 37

Question 38

Question 39

1. The energy levels in the atom
2. The energy spectrum in \beta ^{-} decay
3. Electron diffraction from crystals
4. The Rutherford-Geiger-Mardsen scattering experiment

Question 40

1. 4.5 \times 10^{-15} m
2. 9.0 \times 10^{-15} m
3. 4.5 \times 10^{-14} m
4. 9.0 \times 10^{-14} m