Charged Particles in Uniform Electric Fields (HSC SSCE Physics): Quizzes

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Charged Particles in Uniform Electric Fields
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What is the formula for electric field strength EE in terms of force FF and charge qq?

E=FqE = \frac{F}{q}

What is the typical magnitude of Earth's electric field in fair weather conditions?

Approximately 100 Vm1100\text{ V} \cdot \text{m}^{-1}

What does the density (closeness) of electric field lines indicate?

Field strength; closer lines mean stronger

For parallel plates, which formula relates electric field EE to potential difference ΔV\Delta V?

E=ΔVdE = -\frac{\Delta V}{d}

Plates at +8 V+8\text{ V} and 8 V-8\text{ V} are 2 mm2\text{ mm} apart. What is the field magnitude?

8000 Vm18000\text{ V} \cdot \text{m}^{-1}

What is the formula for acceleration aa of a charged particle with charge qq and mass mm in field EE?

a=Eqma = \frac{Eq}{m}

How does a negative charge accelerate relative to the electric field direction?

Opposite to the field direction

What is the formula for work WW done by an electric field on a charge qq through potential ΔV\Delta V?

W=qΔVW = -q\Delta V

In a uniform electric field, what is the relationship between ΔU\Delta U and ΔK\Delta K for a free particle?

ΔU+ΔK=0\Delta U + \Delta K = 0

Starting from rest, which direction does a positive charge move in an electric field?

Toward lower potential

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