General Science

In general science, resistance refers to:

A high-energy electromagnetic radiation used in medical imaging
B opposition to electric current
C SI unit of work and energy
D SI unit of frequency

Which statement correctly identifies Newton’s third law?

A heat transfer by electromagnetic waves
B every action has an equal and opposite reaction
C converging lens
D distance between corresponding points of successive waves

What is the best description of LED?

A short-sightedness generally corrected with a concave lens
B bouncing back of light from a surface
C energy transferred because of a temperature difference
D light-emitting diode

Which statement correctly identifies nuclear fusion?

A V = IR under constant physical conditions
B splitting of a heavy nucleus with energy release
C device changing AC voltage through electromagnetic induction
D combining light nuclei with energy release

What is the best description of ultrasound?

A converging spherical mirror
B sound above about 20 kHz
C mass per unit volume
D heat transfer through matter without bulk movement

Which of the following is most closely associated with sound?

A separation of white light into component colours
B work done per unit charge
C mechanical wave requiring a material medium
D number of oscillations per second

Which statement correctly identifies watt?

A every action has an equal and opposite reaction
B energy associated with position or configuration
C measure related to average kinetic energy of particles
D SI unit of power

In general science, latent heat refers to:

A circuit with multiple branches
B heat absorbed or released during a phase change without temperature change
C repetition of sound caused by reflection
D long-sightedness generally corrected with a convex lens

Which of the following is most closely associated with LED?

A light-emitting diode
B apparent frequency change due to relative motion
C combining light nuclei with energy release
D device changing AC voltage through electromagnetic induction

Which of the following is most closely associated with hypermetropia?

A distance between corresponding points of successive waves
B heat transfer by bulk movement of a fluid
C diverging spherical mirror
D long-sightedness generally corrected with a convex lens

Which statement correctly identifies output gap?

A motion under gravity alone, neglecting other forces
B difference between actual and potential output in an economy
C acceleration due to gravity, about 9.8 m/s² near Earth
D tendency of an object to resist change in its state of motion

In general science, motor refers to:

A machine converting electrical energy into mechanical energy
B bouncing back of light from a surface
C sound below about 20 Hz
D short-sightedness generally corrected with a concave lens

Which statement correctly identifies kilowatt-hour?

A mass multiplied by velocity
B region where magnetic forces can act
C force opposing relative motion or its tendency between surfaces
D unit of energy

Which statement correctly identifies solar cell?

A device converting light directly into electrical energy
B mechanical wave requiring a material medium
C safety device that melts when excessive current flows
D rate of flow of electric charge

In general science, Archimedes principle refers to:

A buoyant force equals the weight of displaced fluid
B force multiplied by displacement in the direction of force
C heat transfer by bulk movement of a fluid
D mass per unit volume

Which statement correctly identifies generator?

A energy due to motion
B machine converting mechanical energy into electrical energy
C pressure applied to an enclosed fluid is transmitted throughout the fluid
D heat transfer by electromagnetic waves

Which of the following is most closely associated with heat?

A mechanical wave requiring a material medium
B rate of flow of electric charge
C energy transferred because of a temperature difference
D safety device that melts when excessive current flows

Which of the following is most closely associated with electromagnet?

A number of oscillations per second
B magnet produced by electric current
C heat transfer through matter without bulk movement
D converging spherical mirror

In general science, myopia refers to:

A heat absorbed or released during a phase change without temperature change
B force per unit area
C short-sightedness generally corrected with a concave lens
D change in momentum produced by a force acting over time

What is the best description of friction?

A device converting light directly into electrical energy
B force opposing relative motion or its tendency between surfaces
C electromagnetic radiation shorter in wavelength than visible violet
D SI unit of pressure

Which of the following is most closely associated with Pascal law?

A diverging lens
B increase in dimensions with temperature rise
C sound above about 20 kHz
D pressure applied to an enclosed fluid is transmitted throughout the fluid

What is the best description of radiation?

A long-sightedness generally corrected with a convex lens
B heat transfer by electromagnetic waves
C change in direction of light when entering another medium
D repetition of sound caused by reflection

Which statement correctly identifies concave lens?

A about 3 × 10^8 m/s in vacuum
B tendency of an object to resist change in its state of motion
C diverging lens
D difference between actual and potential output in an economy

Which of the following is most closely associated with watt?

A short-sightedness generally corrected with a concave lens
B SI unit of power
C bouncing back of light from a surface
D sound below about 20 Hz

In general science, density refers to:

A energy due to motion
B net force equals rate of change of momentum; for constant mass F = ma
C measure related to average kinetic energy of particles
D mass per unit volume