Electrostatics (HSC SSCE Physics): Quizzes

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Potential Energy and Work in an Electric Field
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What is the work done when a charge qq moves distance dd in the direction of electric field EE?

W=EqdW = Eqd

Why is there a negative sign in W=ΔUW = -\Delta U for work done by an electric field?

PE decreases when field does work

Where is the zero of electric potential energy defined by convention?

At infinite separation of charges

What is electric potential VV defined as?

Potential energy per unit charge

What is the change in potential energy when charge qq moves through potential difference ΔV\Delta V?

ΔU=qΔV\Delta U = q\Delta V

What is the relationship between electric field EE and potential difference over distance dd?

E=ΔV/dE = -\Delta V/d

What alternative unit can express electric field strength?

V m1\text{V m}^{-1}

How does potential change in the direction of electric field lines?

Potential decreases

What is the value of one electron volt (eV)?

1.6×1019 J1.6 \times 10^{-19}\text{ J}

What is the relationship between electric field lines and equipotential lines?

Always perpendicular

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