Look inside the AQA A-Level Physics guide (7408)

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Look inside the AQA A-Level Physics guide

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AQA · A-Level · 7408

Physics

Active Recall Guide

3,682 questions

PhysicsContents

Contents

13 topics, 146 subtopics

Measurements and Their Errors87
Particles and Radiation314
Waves191
Mechanics and Materials285
Electricity157
Further Mechanics and Thermal Physics254
Fields and Their Consequences422
Nuclear Physics263
Astrophysics333
Medical Physics462
Engineering Physics290
Turning Points in Physics262
and 1 more

Particles and RadiationQuestions

Particles and Radiation

Constituents of the atom

In the simple atomic model, what particles are found inside the nucleus?
Where are electrons located in the simple model of the atom?
What is the charge of a proton in coulombs?
What is the charge of a neutron?
State the charge of an electron in coulombs.
What is the mass of a proton in kilograms?
State the mass of a neutron in kilograms.
What is the mass of an electron in kilograms?
What is the relative charge of a proton?

Particles and RadiationAnswers

Answers

Constituents of the atom

Protons and neutrons.
Electrons orbit the nucleus.
+1.60 × 10⁻¹⁹ C.
Zero (the neutron has no charge).
−1.60 × 10⁻¹⁹ C.
1.67 × 10⁻²⁷ kg.
1.67 × 10⁻²⁷ kg.
9.11 × 10⁻³¹ kg.
+1.

Further Mechanics and Thermal PhysicsQuestions

Further Mechanics and Thermal Physics

Simple harmonic motion (SHM)

In the definition of simple harmonic motion, what is the relationship between acceleration and displacement?
In which direction is the acceleration always directed in simple harmonic motion?
State the defining equation for simple harmonic motion that relates acceleration to angular frequency and displacement.
In the equation a = −ω²x, what do each of the symbols represent?
State the equation that describes how displacement varies with time for an object undergoing SHM starting at maximum displacement.
Why is a cosine function used rather than a sine function when describing displacement in SHM starting from maximum displacement?
State the equation that expresses velocity in terms of amplitude, angular frequency and displacement for an object undergoing SHM.
Why does the velocity equation for SHM include a ± sign?
At what position does an object undergoing SHM reach its maximum speed?

Further Mechanics and Thermal PhysicsAnswers

Answers

Simple harmonic motion (SHM)

Acceleration is directly proportional to displacement from the equilibrium position.
The acceleration is always directed towards the equilibrium position.
a = −ω²x
a is acceleration, ω is angular frequency, and x is displacement from equilibrium.
x = A cos(ωt)
The cosine function has its maximum value at t = 0, which corresponds to the object starting at maximum displacement.
v = ±ω√(A² − x²)
The ± sign indicates that the object can be moving in either direction (positive or negative) at a given displacement.
At the equilibrium position (where displacement is zero).

Medical PhysicsQuestions

Medical Physics

Physics of vision

Which structure in the eye provides the majority of the refractive power?
What is the role of the lens in the eye's optical system?
Where does the image form in the eye after light has been refracted?
At which surface does light first undergo significant refraction when entering the eye?
After passing through the cornea, where does light undergo further refraction before reaching the retina?
In a ray diagram of the eye viewing a distant object, what do the incident parallel rays represent?
In a ray diagram for a distant object, where do the refracted rays converge?
What happens to the ciliary muscles when the eye accommodates to view a near object?
During accommodation for near vision, what happens to the suspensory ligaments?

Medical PhysicsAnswers

Answers

Physics of vision

The cornea provides most of the refractive power.
The lens adjusts focus for objects at different distances by fine-tuning the refraction of light.
The image forms on the retina.
Light is first refracted at the cornea surface.
Light is further refracted at the surfaces of the lens.
Parallel rays represent light from a distant object, where the rays are effectively parallel due to the large object distance.
The rays converge at a focal point on the retina.
The ciliary muscles contract.
The suspensory ligaments slacken.

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