IB Physics HL D 2 6 Electric Field Strength Questions

Practise IB Physics HL D.2.6 by solving electric-field magnitude, vector direction, particle motion and multi-charge superposition problems.

Exam points

Solve electric-field magnitude and vector superposition for several charges.
Relate field strength to force, acceleration and motion of charged particles.
Analyse fields from point charges, spheres and parallel plates with direction and units.

[Maximum number: 4]

This question is in two parts. Part 1 is about photoelectricity. Part 2 is about electrical and magnetic force fields.
Part 1 Photoelectricity

(a)

Define electric field strength.

[ 2 ]

(b)

(b) The diagram shows a pair of horizontal metal plates. Electrons can be deflected vertically using an electric field between the plates.

[ 2 ]

(i)

Calculate the force on an electron between the plates when the electric field strength has a value of $2.5 \times 10^{3} \mathrm{NC}^{-1}$ .

[ 2 ]

$F=2.5 \times 10^{3} \times 1.6 \times 10^{-19}$ ;
$4.0 \times 10^{-16} \mathrm{~N}$ ;

Marking guidance:

Award [2] for a bald correct answer.

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