Summary iGCSE Physics Pearson Edexcel Quick Fire Questions and Answers

QUICK FIRE PHYSICS QUESTIONS

MOVEMENT AND POSITION

• What do distance time graphs show us?
• How is the speed shown on a distance time graph?
• What is the equation for averages speed?
• Describe a practical to investigate the motion of everyday objects.
• What is the equation for acceleration?
• What do velocity time graphs show us?
• How is the acceleration shown on a velocity time graph?
• How is distance shown on a velocity time graph?

FORCES, MOVEMENT, SHAPE AND MOMENTUM

• What are the three different ways forces can affect something?
• What are the eight types of common forces?
• Explain each of the eight forces.
• What is a vector?
• What is a scalar?
• What is a resultant force?
• What is friction?
• What is the equation for an unbalanced force?
• What is the equation for weight?
• Give the definition of stopping distance.
• What factors affect thinking distance?
• What factors affect braking distance?
• Describe terminal velocity including the use of a parachute.
• Describe a practical to validate Hooke’s law.
• What is Hooke’s law?
• What is the elastic limit?
• What features of a car are for safety?
• How do these features offer safety?
• What is the equation for momentum?
• What is the equation for impact force?
• What is the conservation of momentum principle?
• What equation validates the conservation of momentum?
• What is Newton’s 3rd law?
• What is a moment?
• What is the equation for a moment?
• What is the center of gravity?
• How do you find the center of gravity of an irregular object?
• State the principle of moments.
• A plank is resting on two beams with an object at the center. What force do the
beams have on them?
• If the object moves towards one beam what happens to the forces on each beam?

MAINS ELECTRICITY

• What is the role of a fuse in a circuit?
• How does a fuse work?
• What is the use of an earth wire?

,• In a plug, describe the blue wire.
• In a plug, describe the brown wire.
• In a plug, describe the yellow/green wire.
• How does the earth wire work?
• Describe double insulation.
• How does electricity flow in metals
• What is the equation for power?
• How are fuses selected?
• What is the equation for energy transferred?
• What is an alternating current?
• What is a direct current?

ENERGY AND VOLTAGE IN CIRCUITS

• Describe the formation of a series circuit.
• Describe the formation of a parallel circuit.
• What two factors affect current in circuits and how do they affect the current?
• How does voltage change in a circuit?
• How does voltage change through a resistor?
• How does voltage change through a filament lamp?
• How does voltage change through a diode?
• What is resistance and does it affect current flow?
• Describe a thermistor and examples of thermistors.
• Describe a LDR and examples of LDR’s.
• Describe lamps and LED’s and examples of LED’s.
• What is the equation for current?
• What is the equation for charge?
• Give the definition for current.
• In a parallel circuit how does current split up?
• In a series circuit how is voltage shared across components?
• In a parallel circuit how is voltage share across components?
• When two or more components are connected in series what happens to the
current, voltage and resistance?
• Give the definition of voltage.
• What is the equation for energy transferred?

ELECTRIC CHARGE

• Give the definition of a conductor and give some examples.
• Give the definition of an insulator and give some examples.
• Describe a practical to investigate how insulating materials can be charged by
friction.
• What are electrons?
• Is the number of electrons equal to the number of protons?
• If a substance gains electrons does it gain a positive or negative charge?
• If a substance loses electrons does it gain a positive or negative charge?
• What is the danger of static electricity and the dangers of refueling a plane.
• Describe the function of static electricity in paint/crop spraying.
• Describe the function of static electricity in photocopiers.
• Describe the function of static electricity in inkjet printers.
• Describe the function of static electricity in electrostatic precipitators.

, PROPERTIES OF WAVES

• Give the definition, shape and examples of longitudinal waves.
• Give the definition, shape and examples of longitudinal waves.
• Give the definition of a wave.
• Give the definition of wavelength.
• Give the definition of amplitude.
• Give the definition of frequency.
• Give the definition of time period.
• What is the equation for wave speed?
• What is the equation for frequency?
• Describe the Doppler effect when an object moves away from the observer.
• Describe the Doppler effect when an object moves towards the observer.
• State the law of reflection.
• Give the definition of refraction.
• When a wave enters a denser medium, what happens to the wave?
• When a wave enters a less dense medium, what happens to the wave?

THE ELECTROMAGNETIC SPECTRUM

• List the electromagnetic waves in order from longest to shortest wavelength.
• What happens to EM waves in a vacuum?
• How can you limit the risks of EM waves?
• State the uses of radiowaves.
• State the dangers and uses of microwaves.
• State the dangers and uses of infrared rays.
• State the dangers and uses of visible rays.
• State the dangers and uses of ultraviolet rays.
• State the uses of x-rays.
• State the uses of gamma rays.

LIGHT AND SOUND

• What type of wave is light?
• How can the reflection of light be shown?
• How can the refraction of light be shown?
• When a light enters a more optically dense medium what happens to the angle of
incidence and refraction?
• When a light enters a less optically dense medium what happens to the angle of
incidence and refraction?
• Describe a practical to investigate Snell’s Law.
• State Snell’s Law.
• When does TIR occur and in what conditions?
• What is the equation for Sin C?
• Describe the construction and function of optic fibres.
• What type of wave is sound?
• What is the range of audible frequencies for humans?
• What is the name of a reflected sound wave?
• How can the speed of sound be measures – give two methods?
• What happens with the amplitude and frequency of a sound wave increases?