General Science

Which of the following is most closely associated with free fall?

A mass per unit volume
B motion under gravity alone, neglecting other forces
C heat transfer through matter without bulk movement
D converging spherical mirror

What is the best description of ultraviolet?

A splitting of a heavy nucleus with energy release
B electromagnetic radiation shorter in wavelength than visible violet
C SI unit of electric current
D apparent frequency change due to relative motion

Which statement correctly identifies Pascal law?

A pressure applied to an enclosed fluid is transmitted throughout the fluid
B buoyant force equals the weight of displaced fluid
C rate of doing work
D an object remains at rest or in uniform straight-line motion unless acted on by a net external force

Which statement correctly identifies thermal expansion?

A increase in dimensions with temperature rise
B work done per unit charge
C light-emitting diode
D low-resistance path to ground for fault current

What is the best description of potential energy?

A circuit with multiple branches
B material with conductivity between conductor and insulator
C time required for half a radioactive sample to decay
D energy associated with position or configuration

Which statement correctly identifies electromagnetic induction?

A heat transfer through matter without bulk movement
B production of emf by changing magnetic flux
C mass per unit volume
D force multiplied by displacement in the direction of force

What is the best description of coulomb?

A SI unit of electric charge
B heat needed to raise unit mass by one degree
C force opposing relative motion or its tendency between surfaces
D change in direction of light when entering another medium

Which of the following is most closely associated with amplitude?

A rate of electrical energy transfer
B machine converting mechanical energy into electrical energy
C maximum displacement from mean position
D sound above about 20 kHz

Which statement correctly identifies potential difference?

A spontaneous emission from unstable nuclei
B circuit with a single current path
C work done per unit charge
D machine converting electrical energy into mechanical energy

What is the best description of echo?

A repetition of sound caused by reflection
B diverging lens
C sound above about 20 kHz
D increase in dimensions with temperature rise

What is the best description of density?

A SI unit of potential difference
B point through which resultant gravitational force may be considered to act
C mass per unit volume
D unit of energy

In general science, ultraviolet refers to:

A point through which resultant gravitational force may be considered to act
B rate of doing work
C electromagnetic radiation shorter in wavelength than visible violet
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 gravitational acceleration?

A combining light nuclei with energy release
B apparent frequency change due to relative motion
C machine converting mechanical energy into electrical energy
D acceleration due to gravity, about 9.8 m/s² near Earth

What is the best description of diode?

A separation of white light into component colours
B semiconductor device that primarily permits current in one direction
C force per unit area
D heat absorbed or released during a phase change without temperature change

In general science, LED refers to:

A circuit with multiple branches
B light-emitting diode
C repetition of sound caused by reflection
D material with conductivity between conductor and insulator

What is the best description of heat?

A mass per unit volume
B energy transferred because of a temperature difference
C force multiplied by displacement in the direction of force
D electrostatic force varies with charges and inverse square of distance in vacuum

In general science, convex mirror refers to:

A region where magnetic forces can act
B mass multiplied by velocity
C diverging spherical mirror
D about 343 m/s in air near room temperature

Which statement correctly identifies work?

A opposition to electric current
B force multiplied by displacement in the direction of force
C device converting light directly into electrical energy
D magnet produced by electric current

In general science, electrical power refers to:

A production of emf by changing magnetic flux
B ideal oscillating bob suspended by a light string
C SI unit of electric charge
D rate of electrical energy transfer

Which statement correctly identifies Doppler effect?

A apparent frequency change due to relative motion
B electrostatic force varies with charges and inverse square of distance in vacuum
C time for one complete oscillation
D force multiplied by displacement in the direction of force

What is the best description of wavelength?

A heat transfer by electromagnetic waves
B pressure applied to an enclosed fluid is transmitted throughout the fluid
C energy due to motion
D distance between corresponding points of successive waves

What is the best description of magnetic field?

A mass multiplied by velocity
B difference between actual and potential output in an economy
C about 3 × 10^8 m/s in vacuum
D region where magnetic forces can act

In general science, refraction refers to:

A electromagnetic radiation strongly associated with thermal radiation
B SI unit of force
C change in direction of light when entering another medium
D about 3 × 10^8 m/s in vacuum

Which statement correctly identifies electromagnet?

A force per unit area
B magnet produced by electric current
C production of emf by changing magnetic flux
D change in momentum produced by a force acting over time

What is the best description of inertia?

A increase in dimensions with temperature rise
B diverging lens
C measure related to average kinetic energy of particles
D tendency of an object to resist change in its state of motion