Showing
117
question(s) for
UK Class 10
—
Subject:
Physics
Physics
Q1.
What is meant by scalar quantity?
Answer:
A scalar quantity has magnitude only and no direction.
Physics
Q2.
What is meant by vector quantity?
Answer:
A vector quantity has both magnitude and direction.
Physics
Q3.
What is distance?
Answer:
Distance is the total length of the path travelled by an object.
Physics
Q4.
What is displacement?
Answer:
Displacement is the distance travelled in a particular direction from the starting point.
Physics
Q5.
What is speed?
Answer:
Speed is the distance travelled per unit time.
Physics
Q6.
What is the SI unit of speed?
Answer:
The SI unit of speed is metre per second (m/s).
Physics
Q7.
What is velocity?
Answer:
Velocity is the rate of change of displacement with time.
Physics
Q8.
What is acceleration?
Answer:
Acceleration is the rate of change of velocity with time.
Physics
Q9.
What is the SI unit of acceleration?
Answer:
The SI unit of acceleration is metre per second squared (m/s²).
Physics
Q10.
What is uniform motion?
Answer:
Uniform motion occurs when an object travels equal distances in equal intervals of time.
Physics
Q11.
What is non-uniform motion?
Answer:
Non-uniform motion occurs when an object travels unequal distances in equal intervals of time.
Physics
Q12.
What is Newton's first law of motion?
Answer:
An object remains at rest or in uniform motion unless acted upon by an external resultant force.
Physics
Q13.
What is Newton's second law of motion?
Answer:
The acceleration of an object is proportional to the resultant force and inversely proportional to its mass, giving F = ma.
Physics
Q14.
What is Newton's third law of motion?
Answer:
When two objects interact, they exert equal and opposite forces on each other.
Physics
Q15.
What is force?
Answer:
Force is an interaction that can change an object's motion, direction or shape.
Physics
Q16.
What is the SI unit of force?
Answer:
The SI unit of force is the newton (N).
Physics
Q17.
What is mass?
Answer:
Mass is the amount of matter in an object and is also a measure of its inertia.
Physics
Q18.
What is weight?
Answer:
Weight is the gravitational force acting on an object.
Physics
Q19.
What is the equation for weight?
Answer:
Weight is given by W = mg, where m is mass and g is gravitational field strength.
Physics
Q20.
What is gravitational field strength?
Answer:
Gravitational field strength is the force acting per unit mass at a point in a gravitational field.
Physics
Q21.
What is momentum?
Answer:
Momentum is the product of an object's mass and velocity.
Physics
Q22.
What is the equation for momentum?
Answer:
Momentum is given by p = mv.
Physics
Q23.
What is the principle of conservation of momentum?
Answer:
In a closed system, total momentum remains constant provided no external resultant force acts.
Physics
Q24.
What is work done?
Answer:
Work is done when a force causes an object to move through a distance in the direction of the force.
Physics
Q25.
What is the equation for work done?
Answer:
Work done is W = Fs when the force and displacement are in the same direction.
Physics
Q26.
What is the SI unit of work?
Answer:
The SI unit of work is the joule (J).
Physics
Q27.
What is energy?
Answer:
Energy is the capacity to do work.
Physics
Q28.
What is kinetic energy?
Answer:
Kinetic energy is the energy possessed by an object because of its motion.
Physics
Q29.
What is the equation for kinetic energy?
Answer:
Kinetic energy is KE = ½mv².
Physics
Q30.
What is gravitational potential energy?
Answer:
It is energy stored by an object because of its position in a gravitational field.
Physics
Q31.
What is power?
Answer:
Power is the rate at which energy is transferred or work is done.
Physics
Q32.
What is the equation for power?
Answer:
Power is P = E/t or P = W/t.
Physics
Q33.
What is the SI unit of power?
Answer:
The SI unit of power is the watt (W).
Physics
Q34.
What is energy conservation?
Answer:
Energy cannot be created or destroyed; it can only be transferred between stores or transformed from one form to another.
Physics
Q35.
What is efficiency?
Answer:
Efficiency is the ratio of useful energy transferred to total energy supplied.
Physics
Q36.
What is a renewable energy resource?
Answer:
A renewable energy resource is naturally replenished and can be used repeatedly.
Physics
Q37.
Give an example of a renewable energy resource.
Answer:
Solar energy is an example of a renewable energy resource.
Physics
Q38.
What is a non-renewable energy resource?
Answer:
A non-renewable energy resource is finite and cannot be replenished quickly enough for continued human use.
Physics
Q39.
What is power generated by a hydroelectric system?
Answer:
A hydroelectric system converts the gravitational potential energy of water into electrical energy.
Physics
Q40.
What is a wave?
Answer:
A wave is a transfer of energy from one place to another without an overall transfer of matter.
Physics
Q41.
What is wavelength?
Answer:
Wavelength is the distance between corresponding points on consecutive waves, such as crest to crest.
Physics
Q42.
What is frequency?
Answer:
Frequency is the number of complete waves passing a point each second.
Physics
Q43.
What is the SI unit of frequency?
Answer:
The SI unit of frequency is the hertz (Hz).
Physics
Q44.
What is amplitude?
Answer:
Amplitude is the maximum displacement of a point on a wave from its equilibrium position.
Physics
Q45.
What is the wave equation?
Answer:
Wave speed is given by v = fλ, where f is frequency and λ is wavelength.
Physics
Q46.
What is a transverse wave?
Answer:
In a transverse wave, particles vibrate perpendicular to the direction of energy transfer.
Physics
Q47.
What is a longitudinal wave?
Answer:
In a longitudinal wave, particles vibrate parallel to the direction of energy transfer.
Physics
Q48.
What type of wave is sound?
Answer:
Sound is a longitudinal mechanical wave.
Physics
Q49.
Can sound travel through a vacuum?
Answer:
No, sound needs a medium because it is a mechanical wave.
Physics
Q50.
What determines the pitch of a sound?
Answer:
The frequency of the sound wave determines its pitch.
Physics
Q51.
What determines the loudness of a sound?
Answer:
The amplitude of the sound wave affects its loudness.
Physics
Q52.
What is an electromagnetic wave?
Answer:
An electromagnetic wave is a transverse wave consisting of oscillating electric and magnetic fields.
Physics
Q53.
Can electromagnetic waves travel through a vacuum?
Answer:
Yes, electromagnetic waves can travel through a vacuum.
Physics
Q54.
What is reflection?
Answer:
Reflection is the change in direction of a wave when it bounces from a surface.
Physics
Q55.
What is refraction?
Answer:
Refraction is the change in direction and speed of a wave when it enters a different medium.
Physics
Q56.
What is diffraction?
Answer:
Diffraction is the spreading of waves as they pass through a gap or around an obstacle.
Physics
Q57.
What is the law of reflection?
Answer:
The angle of incidence equals the angle of reflection.
Physics
Q58.
What is a normal in reflection?
Answer:
The normal is a line drawn perpendicular to the reflecting surface at the point of incidence.
Physics
Q59.
What is a lens?
Answer:
A lens is a transparent optical device that refracts light to form images.
Physics
Q60.
What is a convex lens?
Answer:
A convex lens is thicker in the middle and can converge parallel rays of light.
Physics
Q61.
What is a concave lens?
Answer:
A concave lens is thinner in the middle and causes parallel rays of light to diverge.
Physics
Q62.
What is the electromagnetic spectrum?
Answer:
The electromagnetic spectrum is the complete range of electromagnetic radiation arranged by frequency or wavelength.
Physics
Q63.
Which electromagnetic wave has the highest frequency?
Answer:
Gamma radiation has the highest frequency in the electromagnetic spectrum.
Physics
Q64.
Which electromagnetic wave has the longest wavelength?
Answer:
Radio waves have the longest wavelengths.
Physics
Q65.
What is infrared radiation?
Answer:
Infrared is electromagnetic radiation with a longer wavelength than visible light and is strongly associated with thermal radiation.
Physics
Q66.
What is ultraviolet radiation?
Answer:
Ultraviolet radiation has a shorter wavelength than visible violet light and can cause skin damage with excessive exposure.
Physics
Q67.
What is electric current?
Answer:
Electric current is the rate of flow of electric charge.
Physics
Q68.
What is the SI unit of current?
Answer:
The SI unit of current is the ampere (A).
Physics
Q69.
What is potential difference?
Answer:
Potential difference is the energy transferred per unit charge between two points in a circuit.
Physics
Q70.
What is the SI unit of potential difference?
Answer:
The SI unit of potential difference is the volt (V).
Physics
Q71.
What is resistance?
Answer:
Resistance is the opposition to the flow of electric current.
Physics
Q72.
What is the SI unit of resistance?
Answer:
The SI unit of resistance is the ohm (Ω).
Physics
Q73.
What is Ohm's law?
Answer:
For a conductor at constant temperature, the current is directly proportional to the potential difference across it, giving V = IR.
Physics
Q74.
What happens to total resistance when resistors are connected in series?
Answer:
The total resistance is the sum of the individual resistances.
Physics
Q75.
What happens to current in a series circuit?
Answer:
The same current flows through every component in a series circuit.
Physics
Q76.
What happens to potential difference in a series circuit?
Answer:
The supply potential difference is shared between the components.
Physics
Q77.
What happens to current in a parallel circuit?
Answer:
The current splits between the different branches of the circuit.
Physics
Q78.
What happens to potential difference across parallel branches?
Answer:
The potential difference is the same across each parallel branch.
Physics
Q79.
What is electrical power?
Answer:
Electrical power is the rate at which electrical energy is transferred.
Physics
Q80.
What is the equation for electrical power?
Answer:
Electrical power can be calculated using P = VI.
Physics
Q81.
What is electrical energy?
Answer:
Electrical energy is the energy transferred by an electrical device.
Physics
Q82.
What is a fuse?
Answer:
A fuse is a safety device containing a thin wire that melts when excessive current flows.
Physics
Q83.
What is an earth wire?
Answer:
The earth wire provides a low-resistance path to ground if a fault makes a metal case live.
Physics
Q84.
What is static electricity?
Answer:
Static electricity is an imbalance of electric charge that remains on an object's surface.
Physics
Q85.
How are objects charged by friction?
Answer:
Electrons are transferred between materials when they are rubbed together, leaving the objects with opposite charges.
Physics
Q86.
What happens between two like electric charges?
Answer:
Like charges repel each other.
Physics
Q87.
What happens between two unlike electric charges?
Answer:
Unlike charges attract each other.
Physics
Q88.
What is a magnetic field?
Answer:
A magnetic field is a region where magnetic materials or moving charges experience magnetic forces.
Physics
Q89.
What is an electromagnet?
Answer:
An electromagnet is a temporary magnet produced by passing current through a coil of wire.
Physics
Q90.
How can the strength of an electromagnet be increased?
Answer:
Its strength can be increased by increasing the current, increasing the number of coil turns or using a suitable iron core.
Physics
Q91.
What is electromagnetic induction?
Answer:
Electromagnetic induction is the production of a potential difference when the magnetic field through a conductor changes.
Physics
Q92.
What is a generator?
Answer:
A generator converts mechanical energy into electrical energy using electromagnetic induction.
Physics
Q93.
What is a transformer?
Answer:
A transformer changes the potential difference of an alternating current supply using electromagnetic induction.
Physics
Q94.
What is a step-up transformer?
Answer:
A step-up transformer increases the potential difference of an AC supply.
Physics
Q95.
What is a step-down transformer?
Answer:
A step-down transformer decreases the potential difference of an AC supply.
Physics
Q96.
What is the purpose of the National Grid?
Answer:
The National Grid transfers electrical power from power stations to consumers across the country.
Physics
Q97.
Why is electricity transmitted at high potential difference?
Answer:
High potential difference allows the same power to be transmitted with lower current, reducing energy losses in the cables.
Physics
Q98.
What is density?
Answer:
Density is mass per unit volume.
Physics
Q99.
What is the equation for density?
Answer:
Density is given by ρ = m/V.
Physics
Q100.
What is pressure?
Answer:
Pressure is the force acting normally per unit area.
Physics
Q101.
What is the equation for pressure?
Answer:
Pressure is given by p = F/A.
Physics
Q102.
What is the SI unit of pressure?
Answer:
The SI unit of pressure is the pascal (Pa).
Physics
Q103.
What happens to pressure in a liquid as depth increases?
Answer:
Pressure increases as depth increases because there is a greater weight of liquid above.
Physics
Q104.
What is upthrust?
Answer:
Upthrust is the upward force exerted by a fluid on an immersed object.
Physics
Q105.
What is Hooke's law?
Answer:
For an elastic object, extension is proportional to force up to the limit of proportionality.
Physics
Q106.
What is elastic deformation?
Answer:
Elastic deformation is a temporary change in shape where the object returns to its original shape when the force is removed.
Physics
Q107.
What is plastic deformation?
Answer:
Plastic deformation is a permanent change in shape that remains after the force is removed.
Physics
Q108.
What is thermal energy?
Answer:
Thermal energy is energy stored in a substance because of the motion and arrangement of its particles.
Physics
Q109.
What is specific heat capacity?
Answer:
Specific heat capacity is the energy required to raise the temperature of 1 kg of a substance by 1°C.
Physics
Q110.
What is specific latent heat?
Answer:
Specific latent heat is the energy required to change the state of 1 kg of a substance without changing its temperature.
Physics
Q111.
What is conduction?
Answer:
Conduction is the transfer of thermal energy through a material without the material as a whole moving.
Physics
Q112.
What is convection?
Answer:
Convection is the transfer of thermal energy through the movement of a fluid.
Physics
Q113.
What is infrared radiation in heat transfer?
Answer:
Infrared radiation transfers thermal energy by electromagnetic waves and does not require a medium.
Physics
Q114.
What is nuclear fission?
Answer:
Nuclear fission is the splitting of a large unstable nucleus into smaller nuclei, releasing energy and usually neutrons.
Physics
Q115.
What is nuclear fusion?
Answer:
Nuclear fusion is the joining of light nuclei to form a heavier nucleus, releasing energy.
Physics
Q116.
What is radioactive decay?
Answer:
Radioactive decay is the random process in which an unstable nucleus emits radiation and changes into a more stable state.
Physics
Q117.
What is half-life?
Answer:
Half-life is the time taken for the number of unstable nuclei in a radioactive sample to halve.