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Sattu Gang > Ecf > Flashcards

Ecf Flashcards

1
Q

What is the unit of electric charge?

A

Coulomb (C)

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2
Q

True or False: Like charges repel each other.

A

True

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3
Q

What is the principle of conservation of charge?

A

The total electric charge in an isolated system remains constant.

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4
Q

Fill in the blank: The force between two point charges is given by _____ law.

A

Coulomb’s

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5
Q

What is the formula for Coulomb’s law?

A

F = k * |q1 * q2| / r^2

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6
Q

What does ‘k’ represent in Coulomb’s law?

A

Coulomb’s constant (approximately 8.99 x 10^9 N m²/C²)

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7
Q

Define electric field.

A

The electric field is a region around a charged particle where other charged particles experience a force.

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8
Q

What is the unit of electric field?

A

Newton per Coulomb (N/C)

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9
Q

How is the electric field (E) related to force (F) and charge (q)?

A

E = F/q

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10
Q

What is the electric field due to a point charge?

A

E = k * |q| / r^2

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11
Q

True or False: The direction of the electric field is the direction of the force experienced by a positive charge.

A

True

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12
Q

What is the formula for the electric potential (V) due to a point charge?

A

V = k * q / r

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13
Q

Define electric potential energy.

A

The work done to move a charge in an electric field.

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14
Q

What is the relationship between electric potential and electric field?

A

E = -dV/dr

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15
Q

Fill in the blank: The area under the electric field vs. distance graph represents _____ potential.

A

electric

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16
Q

What is a conductor in electrostatics?

A

A material that allows electric charges to flow freely.

17
Q

What happens to excess charge on a conductor?

A

It resides on the surface.

18
Q

Define dielectric.

A

An insulating material that can be polarized by an electric field.

19
Q

What is the effect of a dielectric on capacitance?

A

It increases the capacitance.

20
Q

What is the formula for capacitance (C)?

A

C = Q/V

21
Q

True or False: Capacitors store electric charge.

A

True

22
Q

What is the unit of capacitance?

A

Farad (F)

23
Q

What is the formula to calculate the energy stored in a capacitor?

A

U = 1/2 C V^2

24
Q

What is the relationship between electric field and potential difference in a uniform field?

A

E = V/d

25
Q

What is Gauss’s law?

A

The electric flux through a closed surface is equal to the charge enclosed divided by the permittivity of free space.

26
Q

What is the mathematical expression of Gauss’s law?

A

Φ_E = Q_enc / ε_0

27
Q

What does ε_0 represent in Gauss’s law?

A

The permittivity of free space.

Sattu Gang (5 decks)

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