IB Physics HL D 2 16 Hl Work in Electric Fields Questions

Practise IB Physics HL D.2.16 Electric potential and field graphs with questions interpreting electric-field graphs, potential changes and physical consequences.

Exam points

Use W=qΔV to calculate work done and changes in electric potential energy.
Relate work by an electric field to potential difference, charge sign and direction of motion.
Apply conservation of energy to connect electric work, potential energy and kinetic energy.

[Maximum number: 2]

This question is in two parts

Ionized hydrogen atoms are accelerated from rest in the vacuum between two vertical parallel conducting plates. The potential difference between the plates is V. As a result of the acceleration each ion gains an energy of $1.9 \times 10^{-18} \mathrm{~J}$ .

Calculate the value of V.

$\quad V=\frac{1.9 \times 10^{-18}}{1.6 \times 10^{-19}}$ ;
$=12 \mathrm{~V}$ ;

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IB Physics HL D 2 16 Hl Work in Electric Fields Questions question 1