General Science

Which of the following is most closely associated with generator?

A diverging lens
B machine converting mechanical energy into electrical energy
C rate of electrical energy transfer
D sound above about 20 kHz

What is the best description of free fall?

A SI unit of potential difference
B point through which resultant gravitational force may be considered to act
C motion under gravity alone, neglecting other forces
D unit of energy

Which of the following is most closely associated with potential difference?

A SI unit of power
B work done per unit charge
C SI unit of electrical resistance
D sum of kinetic and potential energy

In general science, coulomb refers to:

A rate of flow of electric charge
B SI unit of electric charge
C safety device that melts when excessive current flows
D mechanical wave requiring a material medium

In general science, infrared refers to:

A SI unit of frequency
B every action has an equal and opposite reaction
C motion under gravity alone, neglecting other forces
D electromagnetic radiation strongly associated with thermal radiation

What is the best description of frequency?

A production of emf by changing magnetic flux
B force per unit area
C change in momentum produced by a force acting over time
D number of oscillations per second

In general science, hertz refers to:

A time required for half a radioactive sample to decay
B SI unit of power
C material with conductivity between conductor and insulator
D SI unit of frequency

In general science, output gap refers to:

A rate of doing work
B difference between actual and potential output in an economy
C heat transfer by bulk movement of a fluid
D buoyant force equals the weight of displaced fluid

Which statement correctly identifies hypermetropia?

A mass per unit volume
B electrostatic force varies with charges and inverse square of distance in vacuum
C force multiplied by displacement in the direction of force
D long-sightedness generally corrected with a convex lens

Which of the following is most closely associated with conduction?

A low-resistance path to ground for fault current
B light-emitting diode
C electromagnetic radiation strongly associated with thermal radiation
D heat transfer through matter without bulk movement

Which statement correctly identifies gravitational acceleration?

A SI unit of force
B acceleration due to gravity, about 9.8 m/s² near Earth
C about 3 × 10^8 m/s in vacuum
D electromagnetic radiation strongly associated with thermal radiation

Which of the following is most closely associated with radioactivity?

A production of emf by changing magnetic flux
B SI unit of electric charge
C spontaneous emission from unstable nuclei
D ideal oscillating bob suspended by a light string

Which statement correctly identifies Newton’s first law?

A heat absorbed or released during a phase change without temperature change
B separation of white light into component colours
C force per unit area
D an object remains at rest or in uniform straight-line motion unless acted on by a net external force

What is the best description of sound?

A point through which resultant gravitational force may be considered to act
B mechanical wave requiring a material medium
C an object remains at rest or in uniform straight-line motion unless acted on by a net external force
D rate of doing work

Which of the following is most closely associated with nuclear fusion?

A point through which resultant gravitational force may be considered to act
B unit of energy
C combining light nuclei with energy release
D SI unit of potential difference

Which of the following is most closely associated with latent heat?

A V = IR under constant physical conditions
B heat absorbed or released during a phase change without temperature change
C splitting of a heavy nucleus with energy release
D device changing AC voltage through electromagnetic induction

What is the best description of momentum?

A maximum displacement from mean position
B heat transfer by bulk movement of a fluid
C diverging spherical mirror
D mass multiplied by velocity

In general science, ultrasound refers to:

A sound above about 20 kHz
B device changing AC voltage through electromagnetic induction
C maximum displacement from mean position
D V = IR under constant physical conditions

What is the best description of work?

A force multiplied by displacement in the direction of force
B sound below about 20 Hz
C circuit with a single current path
D short-sightedness generally corrected with a concave lens

In general science, pascal refers to:

A diverging spherical mirror
B maximum displacement from mean position
C opposition to electric current
D SI unit of pressure

Which statement correctly identifies conduction?

A heat transfer through matter without bulk movement
B mechanical wave requiring a material medium
C rate of flow of electric charge
D separation of white light into component colours

In general science, resonance refers to:

A large oscillation when driving frequency matches natural frequency
B change in momentum produced by a force acting over time
C production of emf by changing magnetic flux
D force per unit area

In general science, pressure refers to:

A difference between actual and potential output in an economy
B tendency of an object to resist change in its state of motion
C force per unit area
D acceleration due to gravity, about 9.8 m/s² near Earth

Which statement correctly identifies LED?

A diverging spherical mirror
B maximum displacement from mean position
C light-emitting diode
D opposition to electric current

Which of the following is most closely associated with Doppler effect?

A apparent frequency change due to relative motion
B diverging spherical mirror
C buoyant force equals the weight of displaced fluid
D heat transfer by bulk movement of a fluid