General Science

What is the best description of earthing?

A SI unit of force
B low-resistance path to ground for fault current
C about 3 × 10^8 m/s in vacuum
D difference between actual and potential output in an economy

Which of the following is most closely associated with pascal?

A SI unit of pressure
B material with conductivity between conductor and insulator
C repetition of sound caused by reflection
D circuit with multiple branches

Which of the following is most closely associated with reflection?

A bouncing back of light from a surface
B SI unit of frequency
C SI unit of work and energy
D motion under gravity alone, neglecting other forces

In general science, electromagnet refers to:

A increase in dimensions with temperature rise
B measure related to average kinetic energy of particles
C magnet produced by electric current
D energy associated with position or configuration

In general science, concave lens refers to:

A diverging lens
B rate of doing work
C buoyant force equals the weight of displaced fluid
D an object remains at rest or in uniform straight-line motion unless acted on by a net external force

In general science, Doppler effect refers to:

A energy transferred because of a temperature difference
B tendency of an object to resist change in its state of motion
C apparent frequency change due to relative motion
D acceleration due to gravity, about 9.8 m/s² near Earth

What is the best description of Ohm law?

A V = IR under constant physical conditions
B rate of electrical energy transfer
C machine converting mechanical energy into electrical energy
D combining light nuclei with energy release

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

A energy due to motion
B net force equals rate of change of momentum; for constant mass F = ma
C diverging spherical mirror
D pressure applied to an enclosed fluid is transmitted throughout the fluid

In general science, conduction refers to:

A heat transfer through matter without bulk movement
B machine converting mechanical energy into electrical energy
C rate of electrical energy transfer
D sound above about 20 kHz

Which statement correctly identifies diode?

A semiconductor device that primarily permits current in one direction
B sound above about 20 kHz
C diverging lens
D increase in dimensions with temperature rise

What is the best description of joule?

A difference between actual and potential output in an economy
B SI unit of work and energy
C tendency of an object to resist change in its state of motion
D acceleration due to gravity, about 9.8 m/s² near Earth

What is the best description of simple pendulum?

A ideal oscillating bob suspended by a light string
B circuit with multiple branches
C material with conductivity between conductor and insulator
D time required for half a radioactive sample to decay

Which statement correctly identifies hertz?

A device converting light directly into electrical energy
B SI unit of frequency
C opposition to electric current
D magnet produced by electric current

Which statement correctly identifies heat?

A change in direction of light when entering another medium
B heat needed to raise unit mass by one degree
C acceleration due to gravity, about 9.8 m/s² near Earth
D energy transferred because of a temperature difference

Which statement correctly identifies potential energy?

A energy associated with position or configuration
B SI unit of electric charge
C splitting of a heavy nucleus with energy release
D large oscillation when driving frequency matches natural frequency

In general science, generator refers to:

A machine converting mechanical energy into electrical energy
B heat absorbed or released during a phase change without temperature change
C separation of white light into component colours
D mechanical wave requiring a material medium

Which of the following is most closely associated with inertia?

A magnet produced by electric current
B tendency of an object to resist change in its state of motion
C electromagnetic radiation shorter in wavelength than visible violet
D device converting light directly into electrical energy

In general science, half-life refers to:

A apparent frequency change due to relative motion
B SI unit of electric current
C time for one complete oscillation
D time required for half a radioactive sample to decay

Which statement correctly identifies convex mirror?

A unit of energy
B SI unit of potential difference
C diverging spherical mirror
D point through which resultant gravitational force may be considered to act

What is the best description of Newton’s first law?

A energy due to motion
B net force equals rate of change of momentum; for constant mass F = ma
C an object remains at rest or in uniform straight-line motion unless acted on by a net external force
D pressure applied to an enclosed fluid is transmitted throughout the fluid

In general science, specific heat capacity refers to:

A number of oscillations per second
B work done per unit charge
C heat needed to raise unit mass by one degree
D converging spherical mirror

Which statement correctly identifies nuclear fission?

A circuit with a single current path
B sound below about 20 Hz
C machine converting electrical energy into mechanical energy
D splitting of a heavy nucleus with energy release

In general science, magnetic field refers to:

A region where magnetic forces can act
B heat absorbed or released during a phase change without temperature change
C separation of white light into component colours
D force per unit area

What is the best description of Newton’s third law?

A force opposing relative motion or its tendency between surfaces
B heat needed to raise unit mass by one degree
C change in direction of light when entering another medium
D every action has an equal and opposite reaction

Which statement correctly identifies magnetic field?

A pressure applied to an enclosed fluid is transmitted throughout the fluid
B energy due to motion
C net force equals rate of change of momentum; for constant mass F = ma
D region where magnetic forces can act