General Science

Which of the following is most closely associated with motor?

A opposition to electric current
B magnet produced by electric current
C machine converting electrical energy into mechanical energy
D maximum displacement from mean position

Which statement correctly identifies infrasound?

A sound below about 20 Hz
B distance between corresponding points of successive waves
C converging lens
D rate of electrical energy transfer

Which of the following is most closely associated with solar cell?

A device converting light directly into electrical energy
B SI unit of pressure
C electromagnetic radiation shorter in wavelength than visible violet
D light-emitting diode

In general science, speed of light refers to:

A SI unit of electric current
B about 3 × 10^8 m/s in vacuum
C apparent frequency change due to relative motion
D combining light nuclei with energy release

Which statement correctly identifies temperature?

A measure related to average kinetic energy of particles
B heat transfer through matter without bulk movement
C force per unit area
D change in momentum produced by a force acting over time

In general science, wavelength refers to:

A sound below about 20 Hz
B circuit with a single current path
C diverging lens
D distance between corresponding points of successive waves

What is the best description of transformer?

A force multiplied by displacement in the direction of force
B time for one complete oscillation
C electrostatic force varies with charges and inverse square of distance in vacuum
D device changing AC voltage through electromagnetic induction

In general science, amplitude refers to:

A rate of flow of electric charge
B maximum displacement from mean position
C change in direction of light when entering another medium
D long-sightedness generally corrected with a convex lens

Which of the following is most closely associated with concave mirror?

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 difference between actual and potential output in an economy
D converging spherical mirror

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

A motion under gravity alone, neglecting other forces
B every action has an equal and opposite reaction
C SI unit of electrical resistance
D about 343 m/s in air near room temperature

Which statement correctly identifies infrared?

A SI unit of electric charge
B electromagnetic radiation strongly associated with thermal radiation
C ideal oscillating bob suspended by a light string
D large oscillation when driving frequency matches natural frequency

What is the best description of potential difference?

A low-resistance path to ground for fault current
B rate of flow of electric charge
C work done per unit charge
D mechanical wave requiring a material medium

Which of the following is most closely associated with earthing?

A pressure applied to an enclosed fluid is transmitted throughout the fluid
B heat transfer by electromagnetic waves
C low-resistance path to ground for fault current
D converging lens

Which statement correctly identifies X-rays?

A combining light nuclei with energy release
B unit of energy
C high-energy electromagnetic radiation used in medical imaging
D SI unit of potential difference

What is the best description of hertz?

A sound below about 20 Hz
B circuit with a single current path
C short-sightedness generally corrected with a concave lens
D SI unit of frequency

What is the best description of volt?

A maximum displacement from mean position
B heat transfer by bulk movement of a fluid
C SI unit of potential difference
D diverging spherical mirror

In general science, parallel circuit refers to:

A sum of kinetic and potential energy
B net force equals rate of change of momentum; for constant mass F = ma
C circuit with multiple branches
D energy due to motion

Which statement correctly identifies ohm?

A sound above about 20 kHz
B machine converting mechanical energy into electrical energy
C SI unit of electrical resistance
D rate of electrical energy transfer

Which statement correctly identifies speed of light?

A about 3 × 10^8 m/s in vacuum
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

In general science, thermal expansion refers to:

A increase in dimensions with temperature rise
B unit of energy
C machine converting electrical energy into mechanical energy
D spontaneous emission from unstable nuclei

In general science, nuclear fission refers to:

A device converting light directly into electrical energy
B large oscillation when driving frequency matches natural frequency
C magnet produced by electric current
D splitting of a heavy nucleus with energy release

Which statement correctly identifies density?

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

In general science, simple pendulum refers to:

A SI unit of work and energy
B ideal oscillating bob suspended by a light string
C difference between actual and potential output in an economy
D SI unit of frequency

Which of the following is most closely associated with ultrasound?

A sound above about 20 kHz
B safety device that melts when excessive current flows
C high-energy electromagnetic radiation used in medical imaging
D semiconductor device that primarily permits current in one direction

In general science, solar cell refers to:

A machine converting mechanical energy into electrical energy
B spontaneous emission from unstable nuclei
C device converting light directly into electrical energy
D rate of electrical energy transfer