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# AQA Physics A-level Section 7: Fields and their Consequences Notes

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@AppreciativeGraffiti

### What do electric field lines represent?

The direction of the force acting on a positive charge

### In a uniform electric field, what is true about the electric force?

It is the same everywhere in the field

### What happens when a charged particle is fired at right angles to a uniform electric field?

It accelerates and follows a parabolic shape

### How can you calculate the work done by moving a charged particle in a uniform field?

<p>$F \times d$</p> Signup and view all the answers

### Which equation helps in calculating the electric field strength?

<p>$F = EQ$</p> Signup and view all the answers

### How are uniform and radial electric fields different in terms of force?

<p>Uniform fields depend on distance between charges for force</p> Signup and view all the answers

### Which of the following statements about force fields is correct?

<p>Force fields are formed during the interaction of masses, static charges, or moving charges.</p> Signup and view all the answers

### What type of field is formed during the interaction of charges?

<p>Electric field</p> Signup and view all the answers

### Which of the following statements about gravitational fields is correct?

<p>Gravitational fields are formed during the interaction of masses.</p> Signup and view all the answers

### How can the strength of a force field be represented in a field line diagram?

<p>The distance between field lines represents the strength of the field.</p> Signup and view all the answers

### Which of the following forces follow an inverse-square law?

<p>Gravitational force and electric force</p> Signup and view all the answers

### What is the main difference between gravitational fields and electric fields?

<p>Gravitational fields are always attractive, while electric fields can be either attractive or repulsive.</p> Signup and view all the answers

### According to Coulomb's law, the force between two point charges is directly proportional to which of the following?

<p>The product of their charges</p> Signup and view all the answers

### In Coulomb's law, if two charges have different signs, what type of force will be present between them?

<p>Attractive</p> Signup and view all the answers

### Why are satellites that orbit quickly required to work together for constant coverage?

<p>To maintain coverage as they orbit rapidly</p> Signup and view all the answers

### Which subatomic particle characteristic results in electrostatic forces being much greater than gravitational forces?

<p>Charge being larger than mass</p> Signup and view all the answers

### When treating air as a vacuum in calculations, what assumption can be made for a charged sphere?

<p>The charge acts at the center of the sphere</p> Signup and view all the answers

### What determines the strength of the force between two point charges in a vacuum according to Coulomb's law?

<p>The distance squared between the charges</p> Signup and view all the answers

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