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Work, Power and Energy — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsWork, Power and Energy1 Mark
Question
(a) Define electron volt and express it in joule.
(b) Give an example when electric energy changes into magnetic energy.
✓

Answer

(a) 1 electron volt $( eV )$ is defined as the amount of work done when an electron moves through an electric field with a potential difference of 1 volt.
$1 eV=\text { charge on one electron } \times 1 V=1.6 \times 10^{-19} C \times 1 V=1.6 \times 10^{-19} J$
(b) Electromagnet

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