General Science

Which statement correctly identifies convex lens?

A ideal oscillating bob suspended by a light string
B production of emf by changing magnetic flux
C SI unit of electric charge
D converging lens

In general science, time period refers to:

A SI unit of potential difference
B time for one complete oscillation
C net force equals rate of change of momentum; for constant mass F = ma
D sum of kinetic and potential energy

Which of the following is most closely associated with impulse?

A spontaneous emission from unstable nuclei
B change in momentum produced by a force acting over time
C SI unit of potential difference
D unit of energy

Which of the following is most closely associated with ohm?

A SI unit of potential difference
B unit of energy
C SI unit of electrical resistance
D spontaneous emission from unstable nuclei

Which of the following is most closely associated with X-rays?

A energy due to motion
B net force equals rate of change of momentum; for constant mass F = ma
C sum of kinetic and potential energy
D high-energy electromagnetic radiation used in medical imaging

Which statement correctly identifies impulse?

A change in momentum produced by a force acting over time
B sound above about 20 kHz
C machine converting mechanical energy into electrical energy
D rate of electrical energy transfer

Which statement correctly identifies free fall?

A about 343 m/s in air near room temperature
B motion under gravity alone, neglecting other forces
C change in momentum produced by a force acting over time
D production of emf by changing magnetic flux

What is the best description of ampere?

A SI unit of electric current
B diverging lens
C measure related to average kinetic energy of particles
D increase in dimensions with temperature rise

Which statement correctly identifies echo?

A opposition to electric current
B repetition of sound caused by reflection
C magnet produced by electric current
D number of oscillations per second

Which of the following is most closely associated with convection?

A material with conductivity between conductor and insulator
B time required for half a radioactive sample to decay
C SI unit of power
D heat transfer by bulk movement of a fluid

Which of the following is most closely associated with dispersion?

A ideal oscillating bob suspended by a light string
B change in momentum produced by a force acting over time
C separation of white light into component colours
D production of emf by changing magnetic flux

What is the best description of time period?

A time for one complete oscillation
B machine converting mechanical energy into electrical energy
C combining light nuclei with energy release
D apparent frequency change due to relative motion

Which of the following is most closely associated with mechanical energy?

A sum of kinetic and potential energy
B energy due to motion
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 echo?

A SI unit of electric charge
B repetition of sound caused by reflection
C splitting of a heavy nucleus with energy release
D large oscillation when driving frequency matches natural frequency

What is the best description of half-life?

A magnet produced by electric current
B opposition to electric current
C device converting light directly into electrical energy
D time required for half a radioactive sample to decay

Which statement correctly identifies inertia?

A converging spherical mirror
B work done per unit charge
C tendency of an object to resist change in its state of motion
D number of oscillations per second

What is the best description of motor?

A energy associated with position or configuration
B machine converting electrical energy into mechanical energy
C measure related to average kinetic energy of particles
D every action has an equal and opposite reaction

What is the best description of electrical power?

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

In general science, kinetic energy refers to:

A energy due to motion
B about 343 m/s in air near room temperature
C electromagnetic radiation shorter in wavelength than visible violet
D SI unit of pressure

Which of the following is most closely associated with output gap?

A heat needed to raise unit mass by one degree
B difference between actual and potential output in an economy
C long-sightedness generally corrected with a convex lens
D change in direction of light when entering another medium

In general science, momentum refers to:

A device changing AC voltage through electromagnetic induction
B V = IR under constant physical conditions
C mass multiplied by velocity
D splitting of a heavy nucleus with energy release

Which statement correctly identifies electric current?

A semiconductor device that primarily permits current in one direction
B repetition of sound caused by reflection
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 newton?

A work done per unit charge
B number of oscillations per second
C low-resistance path to ground for fault current
D SI unit of force

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

A about 343 m/s in air near room temperature
B region where magnetic forces can act
C mass multiplied by velocity
D V = IR under constant physical conditions

Which statement correctly identifies semiconductor?

A material with conductivity between conductor and insulator
B long-sightedness generally corrected with a convex lens
C change in direction of light when entering another medium
D heat needed to raise unit mass by one degree