In which direction does the electric field point between two charged parallel plates?

From the positive plate to the negative plate .

Are the units V m -1 and N C -1 for electric field strength equivalent?

Yes, the two units are equivalent .

A neutron enters the region between two charged parallel plates. Describe its path.

It travels straight through undeflected , since it is uncharged and experiences no electric force.

How does increasing the mass of a charged particle (charge and speed unchanged) affect its deflection in a uniform electric field?

The deflection decreases — a greater mass gives a smaller deflection.

How does increasing the speed of a charged particle (mass and charge unchanged) affect its deflection in a uniform electric field?

The deflection decreases — a greater speed gives a smaller deflection.

True or False? Increasing the charge of a particle, with mass and speed unchanged, decreases its deflection in a uniform electric field.

False. A greater charge magnitude experiences a greater electric force, so the deflection increases , not decreases.

The force on a charged particle at all points within a uniform electric field is .......... in magnitude and direction.

The force on a charged particle at all points within a uniform electric field is constant in magnitude and direction.

A LevelPhysicsCambridge (CIE)Flashcards18. Electric FieldsUniform Electric Fields

Uniform Electric Fields (Cambridge (CIE) A Level Physics): Flashcards

Exam code: 9702

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FrontElectric Field Between Parallel Plates
Define the uniform electric field strength between two parallel plates.

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Cards in this collection (14)

Define the uniform electric field strength between two parallel plates.
It is the ratio of the potential difference between the plates to the distance between them: $E = \frac{Δ V}{Δ d}$
In which direction does the electric field point between two charged parallel plates?
From the positive plate to the negative plate.
Why can $E = \frac{V}{d}$ not be used to calculate the electric field strength around a point charge?
Because the field around a point charge is radial, not uniform, so this equation only applies between parallel plates.
The work done in moving a charge q through a potential difference V between parallel plates is given by $W = q$ ..........
The work done in moving a charge q through a potential difference V between parallel plates is given by $W = q V$
If one of two parallel plates is earthed, what is its potential?
0 V
True or False?
Doubling the separation between two parallel plates, while keeping the potential difference constant, doubles the electric field strength between them.
False.
Field strength is inversely proportional to separation ( $E = V / d$ ), so doubling the separation halves the field strength.
Are the units V m^-1 and N C^-1 for electric field strength equivalent?
Yes, the two units are equivalent.
What path does a charged particle take when it enters a uniform electric field moving perpendicular to the field lines?
A parabolic trajectory.
A positive charge enters a uniform field between two parallel plates, moving perpendicular to the field lines. Towards which plate is it deflected?
Towards the negative plate.
A neutron enters the region between two charged parallel plates. Describe its path.
It travels straight through undeflected, since it is uncharged and experiences no electric force.
How does increasing the mass of a charged particle (charge and speed unchanged) affect its deflection in a uniform electric field?
The deflection decreases — a greater mass gives a smaller deflection.
How does increasing the speed of a charged particle (mass and charge unchanged) affect its deflection in a uniform electric field?
The deflection decreases — a greater speed gives a smaller deflection.
True or False?
Increasing the charge of a particle, with mass and speed unchanged, decreases its deflection in a uniform electric field.
False.
A greater charge magnitude experiences a greater electric force, so the deflection increases, not decreases.
The force on a charged particle at all points within a uniform electric field is .......... in magnitude and direction.
The force on a charged particle at all points within a uniform electric field is constant in magnitude and direction.

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