IB HL Physics tough questions quiz

What is the reading of the scale?

• R+W

• W

• R

• R-W

Two balls of different mass are dropped from the top of a tall building one after the other. The distance between the balls

• Increases with time
• depends on the initial velocity only
• remains constant
• depends on the mass of the balls

The air molecules near X are

• always at the centre of a compression

• always at the centre of a rarefaction

• sometimes at the centre of a compression and sometimes at the centre of a rarefaction

• never at the centre of a compression or a rarefaction

A proton, an electron, and an alpha particle are at rest. Which particle has the smallest magnitude of ratio of charge to mass and which particle has the largest magnitude of ratio of charge to mass?

• Smallest: Alpha, Largest: Electron
• Smallest: Electron, Largest: Alpha
• Smallest: Electron, Largest: Proton
• Smallest: Proton, Largest: Electron

The tension in a horizontal spring is directly proportional to the extension of the spring. The energy stored in the spring at extension x is E. What is the work done by the spring when its extension changes from x to x/4?

• E/16
• E/4
• 3E/4
• 15E/16

Which vector diagram best represents the three forces?

• A

• B

• C

• D

Wavefronts travel from air to medium Q as shown. What is the refractive index of Q?

• sin60/sin45

• sin45/sin60

• sin45/sin30

• sin30/sin45

A system that consists of a single spring stores a total elastic potential energy E when a load is added to the spring. Another identical spring connected in parallel is added to the system. The same load is now applied to the parallel springs. What is the total elastic potential energy stored in the changed system?

• E

• E/2

• E/4

• E/8

A spring loaded with a mass m oscillates with SHM. The amplitude of the motion is A and the spring has total energy E. What is the total energy of the spring when the mass is increased to 3m and the amplitude is increased to 2A?

• 2E
• 4E
• 12E
• 18E

.

• 1

• 2

• 3

• 4