General Science

In general science, newton refers to:

A increase in dimensions with temperature rise
B sound above about 20 kHz
C diverging lens
D SI unit of force

What is the best description of ohm?

A rate of flow of electric charge
B separation of white light into component colours
C mechanical wave requiring a material medium
D SI unit of electrical resistance

In general science, impulse refers to:

A electromagnetic radiation strongly associated with thermal radiation
B low-resistance path to ground for fault current
C light-emitting diode
D change in momentum produced by a force acting over time

Which of the following is most closely associated with simple pendulum?

A an object remains at rest or in uniform straight-line motion unless acted on by a net external force
B point through which resultant gravitational force may be considered to act
C ideal oscillating bob suspended by a light string
D rate of doing work

Which of the following is most closely associated with specific heat capacity?

A heat needed to raise unit mass by one degree
B machine converting electrical energy into mechanical energy
C sound below about 20 Hz
D circuit with a single current path

In general science, diode refers to:

A semiconductor device that primarily permits current in one direction
B number of oscillations per second
C work done per unit charge
D low-resistance path to ground for fault current

What is the best description of nuclear fission?

A converging spherical mirror
B number of oscillations per second
C splitting of a heavy nucleus with energy release
D work done per unit charge

What is the best description of hypermetropia?

A every action has an equal and opposite reaction
B long-sightedness generally corrected with a convex lens
C SI unit of frequency
D motion under gravity alone, neglecting other forces

What is the best description of X-rays?

A semiconductor device that primarily permits current in one direction
B safety device that melts when excessive current flows
C high-energy electromagnetic radiation used in medical imaging
D electromagnetic radiation strongly associated with thermal radiation

Which statement correctly identifies fuse?

A motion under gravity alone, neglecting other forces
B SI unit of frequency
C every action has an equal and opposite reaction
D safety device that melts when excessive current flows

What is the best description of electromagnet?

A SI unit of electrical resistance
B magnet produced by electric current
C sum of kinetic and potential energy
D net force equals rate of change of momentum; for constant mass F = ma

What is the best description of reflection?

A magnet produced by electric current
B opposition to electric current
C maximum displacement from mean position
D bouncing back of light from a surface

What is the best description of speed of light?

A about 3 × 10^8 m/s in vacuum
B V = IR under constant physical conditions
C distance between corresponding points of successive waves
D device changing AC voltage through electromagnetic induction

What is the best description of conduction?

A converging lens
B buoyant force equals the weight of displaced fluid
C heat transfer by electromagnetic waves
D heat transfer through matter without bulk movement

In general science, electric current refers to:

A combining light nuclei with energy release
B apparent frequency change due to relative motion
C machine converting mechanical energy into electrical energy
D rate of flow of electric charge

Which of the following is most closely associated with resistance?

A SI unit of electric current
B electrostatic force varies with charges and inverse square of distance in vacuum
C time for one complete oscillation
D opposition to electric current

Which of the following is most closely associated with resonance?

A increase in dimensions with temperature rise
B large oscillation when driving frequency matches natural frequency
C measure related to average kinetic energy of particles
D energy associated with position or configuration

Which of the following is most closely associated with myopia?

A measure related to average kinetic energy of particles
B increase in dimensions with temperature rise
C diverging lens
D short-sightedness generally corrected with a concave lens

Which of the following is most closely associated with ampere?

A magnet produced by electric current
B electromagnetic radiation shorter in wavelength than visible violet
C device converting light directly into electrical energy
D SI unit of electric current

What is the best description of semiconductor?

A material with conductivity between conductor and insulator
B rate of doing work
C heat transfer by bulk movement of a fluid
D buoyant force equals the weight of displaced fluid

What is the best description of Coulomb law?

A buoyant force equals the weight of displaced fluid
B electrostatic force varies with charges and inverse square of distance in vacuum
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

In general science, temperature refers to:

A bouncing back of light from a surface
B short-sightedness generally corrected with a concave lens
C energy transferred because of a temperature difference
D measure related to average kinetic energy of particles

In general science, infrasound refers to:

A sound below about 20 Hz
B low-resistance path to ground for fault current
C light-emitting diode
D work done per unit charge

What is the best description of resonance?

A large oscillation when driving frequency matches natural frequency
B about 343 m/s in air near room temperature
C SI unit of pressure
D electromagnetic radiation strongly associated with thermal radiation

What is the best description of solar cell?

A device converting light directly into electrical energy
B converging lens
C heat transfer by electromagnetic waves
D distance between corresponding points of successive waves