General Science

Which of the following is most closely associated with ultraviolet?

A force opposing relative motion or its tendency between surfaces
B electromagnetic radiation shorter in wavelength than visible violet
C mass multiplied by velocity
D heat needed to raise unit mass by one degree

In general science, centre of gravity refers to:

A electrostatic force varies with charges and inverse square of distance in vacuum
B point through which resultant gravitational force may be considered to act
C ideal oscillating bob suspended by a light string
D force multiplied by displacement in the direction of force

Which of the following is most closely associated with work?

A SI unit of electric charge
B large oscillation when driving frequency matches natural frequency
C ideal oscillating bob suspended by a light string
D force multiplied by displacement in the direction of force

In general science, potential difference refers to:

A device converting light directly into electrical energy
B work done per unit charge
C SI unit of pressure
D electromagnetic radiation shorter in wavelength than visible violet

Which of the following is most closely associated with speed of light?

A region where magnetic forces can act
B about 343 m/s in air near room temperature
C about 3 × 10^8 m/s in vacuum
D SI unit of force

Which of the following is most closely associated with centre of gravity?

A tendency of an object to resist change in its state of motion
B energy transferred because of a temperature difference
C acceleration due to gravity, about 9.8 m/s² near Earth
D point through which resultant gravitational force may be considered to act

What is the best description of power?

A rate of doing work
B device changing AC voltage through electromagnetic induction
C distance between corresponding points of successive waves
D V = IR under constant physical conditions

In general science, inertia refers to:

A machine converting electrical energy into mechanical energy
B sound below about 20 Hz
C circuit with a single current path
D tendency of an object to resist change in its state of motion

In general science, radioactivity refers to:

A SI unit of power
B time required for half a radioactive sample to decay
C SI unit of electrical resistance
D spontaneous emission from unstable nuclei

Which of the following is most closely associated with temperature?

A diverging spherical mirror
B opposition to electric current
C measure related to average kinetic energy of particles
D maximum displacement from mean position

In general science, power refers to:

A apparent frequency change due to relative motion
B combining light nuclei with energy release
C SI unit of electric current
D rate of doing work

What is the best description of concave mirror?

A device changing AC voltage through electromagnetic induction
B large oscillation when driving frequency matches natural frequency
C splitting of a heavy nucleus with energy release
D converging spherical mirror

In general science, free fall refers to:

A measure related to average kinetic energy of particles
B every action has an equal and opposite reaction
C energy associated with position or configuration
D motion under gravity alone, neglecting other forces

What is the best description of output gap?

A ideal oscillating bob suspended by a light string
B electrostatic force varies with charges and inverse square of distance in vacuum
C difference between actual and potential output in an economy
D SI unit of electric charge

In general science, radiation refers to:

A heat transfer by electromagnetic waves
B semiconductor device that primarily permits current in one direction
C safety device that melts when excessive current flows
D high-energy electromagnetic radiation used in medical imaging

Which of the following is most closely associated with semiconductor?

A material with conductivity between conductor and insulator
B light-emitting diode
C rate of flow of electric charge
D safety device that melts when excessive current flows

Which of the following is most closely associated with diode?

A circuit with a single current path
B time required for half a radioactive sample to decay
C machine converting electrical energy into mechanical energy
D semiconductor device that primarily permits current in one direction

Which statement correctly identifies myopia?

A sum of kinetic and potential energy
B net force equals rate of change of momentum; for constant mass F = ma
C energy due to motion
D short-sightedness generally corrected with a concave lens

In general science, Newton’s second law refers to:

A net force equals rate of change of momentum; for constant mass F = ma
B diverging spherical mirror
C opposition to electric current
D maximum displacement from mean position

Which statement correctly identifies ultraviolet?

A difference between actual and potential output in an economy
B about 3 × 10^8 m/s in vacuum
C electromagnetic radiation shorter in wavelength than visible violet
D SI unit of force

Which statement correctly identifies pascal?

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

Which statement correctly identifies amplitude?

A maximum displacement from mean position
B diverging spherical mirror
C heat transfer by bulk movement of a fluid
D buoyant force equals the weight of displaced fluid

Which statement correctly identifies transformer?

A acceleration due to gravity, about 9.8 m/s² near Earth
B tendency of an object to resist change in its state of motion
C energy transferred because of a temperature difference
D device changing AC voltage through electromagnetic induction

Which option best matches the scientific meaning of this term: Pascal la?

A heat absorbed or released during a phase change without temperature change
B separation of white light into component colours
C pressure applied to an enclosed fluid is transmitted throughout the fluid
D force opposing relative motion or its tendency between surfaces

Select the scientifically correct interpretation of kinetic energy?

A spontaneous emission from unstable nuclei
B energy due to motion
C machine converting electrical energy into mechanical energy
D unit of energy