22 Electric Fields ( missing capacitor bits) Flashcards

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1
Q

What are fields

A

regions in which a charged object will experience a force at a distance

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2
Q

Electric field strength

A

force experienced per unit positive charge at that point

E = F/Q

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3
Q

coulomb’s law

A

F = Qq/(4𝝿r^2 ε0)

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4
Q

equation linking Force(F) ,Field Strength(E), charge(Q)

A

E = FQ

F = E/Q

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5
Q

equation involving, Field strength, Voltage, and distance

Derivation and state the case it works for

A

only works for parallel plates

F = Wd
W= VQ

E = F/Q

EQ = VQd
E = Vd

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6
Q

Unit for electric field strength

A

NC^-1 or Vm^-1

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7
Q

parallel plate capacitor

A

come back to

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8
Q

permittivity of free space experiment

A
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9
Q

what is electric potential energy

A

When two positive charge are brought close they repel each other. The energy takes to bring a charge from infinity away to a distance of r away from the source.

E = Qq/(4𝝿ε0r)

from integrating force with respect to dr from r to infinity

opposite if two charge have different sign

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10
Q

equipotential

A
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