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iGCSE Edexcel Physics Definitions Already Rated A+

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iGCSE Edexcel Physics Definitions Already Rated A+ 1. Define acceleration and describe how it changes with time. - Acceleration is the rate at which velocity changes over time. 2. Explain what air resistance (drag) is in the context of motion. - Air resistance (drag) is the force that opposes t...

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  • July 9, 2024
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iGCSE Edexcel Physics Definitions Already Rated A+
1. Define acceleration and describe how it changes with time.



- Acceleration is the rate at which velocity changes over time.




2. Explain what air resistance (drag) is in the context of motion.



- Air resistance (drag) is the force that opposes the motion of objects moving through air.




3. What does alternating current (AC) refer to?



- Alternating current (AC) is an electric current that changes direction continuously.




4. What is the purpose of an ammeter?



- An ammeter is used to measure the magnitude of electric current flowing through a circuit, in units of


amps (A).

,5. Define the term 'amplified' in the context of electrical signals.



- Amplified refers to an increase in the size or power of electrical signals.




6. What does 'amp' signify in the realm of electric current?



- Amp is the unit of measurement for electric current.




7. Describe what analogue electrical signals are.



- Analogue electrical signals are voltage signals that vary continuously in value.




8. Explain the concept of the angle of incidence in optics.



- The angle of incidence is the angle between an incoming ray of light and the normal (perpendicular)


to a surface.




9. Define 'balanced' in the context of forces or charges.

, - Balanced refers to forces or charges that are equal in magnitude but opposite in direction, resulting


in a net sum of zero.




10. What is the unit 'Becquerel' used to measure?



- Becquerel measures the rate of radioactive decay per second.




11. Define 'braking distance' in the context of vehicle dynamics.



- Braking distance is the distance a vehicle travels after brakes are applied until it comes to a complete


stop.




12. What does 'cell mutation' refer to?



- Cell mutation denotes a change in the function or characteristics of a living cell, often caused by


factors like radiation.

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