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Physics > Electrostatics > Flashcards

Electrostatics Flashcards

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1
Q

The electric force between static charged particles is called?

A

Electrostatics

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2
Q

What is the other name of electrostatics?

A

Coulomb’s force

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3
Q

What is total charge q equal to?

A

q = ne, e is the elementary charge

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4
Q

Coulomb used which apparatus for the study of electric charges?

A

Torsion balance

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5
Q

What is the equation for coulomb’s law?

A

F = kq1q2/r²

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6
Q

What is k equal to?

A

k = 1/4π€

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7
Q

What is the value of €

A

€ = 8.85×10^-12C²N^-1m^-2

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8
Q

What is the value of k?

A

k = 9×10⁹ Nm²C-²

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9
Q

The concept of electric field was proposed by?

A

Michael Faraday

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10
Q

What is the equation for electric field intensity?

A

E = F/q

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11
Q
A
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12
Q

What is the SI unit of electric field intensity?

A

NC^-1, Vm^-1

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13
Q

What is the relation between electric field intensity, charge and distance?

A

E = kq/r²

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14
Q

What is the equation for Gauss’ law?

A

Total electric flux = (1/€)Q

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15
Q

What is the equation for electric field intensity of infinite sheet of charge?

A

E = §/2€

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16
Q

What is the equation for electric field intensity of two infinite parallel charged plates?

A

E = §/€

17
Q

What is the equation for force required to move point charge from one point to another?

A

F = qE

18
Q

What does electrostatic equilibrium means?

A

To not move the charge in such a way that it produces acceleration

19
Q

What is the formula for potential difference?

A

∆V = W/q

20
Q

What is the unit of potential difference?

A

Volt or Joule per coulomb

21
Q

What is the electric field intensity with the relation to potential difference?

A

E = -∆V/∆r

22
Q

What is the work done in moving a point charge from one point to another point on an equipotential surface?

A

Zero

23
Q

Is potential a scalar or vector quantity?

A

Scalar

24
Q

The medium used in capacitor is known as?

A

Dielectric

25
Q

What is the relation between charge and voltage?

A

Q ∞ V

25
Q

SI unit of capacitance is?

A

Farad

26
Q

What is the equation for capacitance?

A

C = €A/d

27
Q

What is the equation for parallel combination of capacitors?

A

Ceq = C1+C2+C3….

28
Q

What is the equation for series combination of capacitors?

A

1/Ceq = 1/C1+1/C2+1/C3…..

29
Q

What is a dipole?

A

Separation of charges with opposite sign and equal magnitude by the distance d

30
Q

What is the equation for energy stored in a capacitor?

A

(1/2)€&E²(Ad)

31
Q

How much time it takes for a capacitor to charge to it’s max. Value?

A

63%

32
Q

What is the equation for time constant?

A

T = RC

Physics (4 decks)

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