Advanced Physics 1: 2019 MCQ

Which of the following particles is an example of a fundamental particle?

• A nucleus

• B neutrino

• C pion

• D proton

A person uses a pivoted lever to lift a boulder of weight W as shown. The centre of gravity of the boulder is a distance d from the pivot. The angle of the lever to the horizontal is θ. Which expression is equal to the moment of W about the pivot?

• Wd

• Wd cosθ

• Wd sinθ

• Wd tanθ

A space rocket lifts off vertically. The rocket lifts off because

• the exhaust gases exert a force on the ground.

• the exhaust gases exert a force on the rocket.

• the ground exerts a force on the rocket.

• the rocket exerts a force on the ground.

A circuit consists of three identical 1.5 V bulbs connected to two 1.5 V cells. The switch is closed. Which row describes the change in brightness of bulb Y and bulb Z?

• brighter brighter

• brighter dimmer

• dimmer brighter

• dimmer dimmer

A cell of e.m.f. 1.5V is connected to a 5.0Ω resistor. The terminal potential difference across the cell is 1.0V. Which of the following is the current in the circuit?

• 0.1A

• 0.2A

• 0.3A

• 0.5A

The diagram shows a graph of current I against potential difference V for an electrical component. Which of the following components would produce a graph of this shape?

• filament bulb

• metallic conductor

• negative temperature coefficient thermistor

• ohmic conductor

The force between two identical point charges, X and Y, is F. Charge X is doubled; charge Y remains the same. Which row of the table gives the force on each charge?

• A: F, F

• B: F, 2F

• C: 2F, F

• D: 2F, 2F

A capacitor of capacitance C is discharged through a resistor of resistance R. The initial discharge current is I₀. Which of the following expressions gives the current after a time equal to RC?

• I₀/e

• I₀/2

• I₀ ln(1/e)

A rectangular sheet of aluminium is attached to an air-track glider as shown. The glider moves towards a region of uniform magnetic field at a constant velocity. When the glider enters the magnetic field, the magnetic flux is perpendicular to the aluminium sheet. Which row of the table describes the velocity of the glider as it enters the magnetic field, when it is completely within the magnetic field and as it leaves the magnetic field?

• A

• B

• C

• D

The solid line shows the path of an alpha particle as it passes close to a nucleus. Another alpha particle approaches the nucleus with the same initial kinetic energy. Which dashed path is possible for this alpha particle?

• A

• B

• C

• D