Electric Field & Conductors
Inside a conductor at electrostatic equilibrium, the electric field must be this value.
What is zero?
Capacitance depends only on an objects geometry and this constant.
What is permittivity?
In series capacitors, this quantity is identical for all capacitors.
What is charge?
Energy stored in a capacitor is proportional to the square of this quantity.
Voltage
The quantity that measures how much a material increases capacitance.
Dielectric constant
If excess charge is placed on a solid conductor, it will move until it resides in this location.
What is the outer surface?
For a parallel plate capacitor, doubling plate separation changes capacitance by this factor.
What is 1/2?
In parallel capacitors, this quantity is identical for all capacitors.
What is voltage?
Energy stored in a capacitor is located physically in this.
The electric field
When a dielectric is inserted, capacitance changes by this factor.
k
A point charge +Q is placed outside a neutral conducting sphere. The field inside the conductor is still this.
What is zero?
If plate area is tripled and separation is halved, capacitance changes by this factor.
What is 6x?
Two capacitors 4 μF and 8 μF are in parallel. Find equivalent capacitance.
12 μF
If voltage across a capacitor doubles, energy changes by this factor.
4x
When a dielectric is inserted while the capacitor remains connected to a battery, charge does this.
Increases
If a conductor is placed in an external electric field, free charges redistribute until..
The electric field inside the conductor becomes zero
A capacitor stores 12 μC at 4 V. Find its capacitance.
What is 3μF
Two capacitors 4 μF and 8 μF are in series. Find equivalent capacitance.
2.67 μF
A 5 μF capacitor is connected to 10 V. Find stored energy.
(2.5×10^4) Joules
When a dielectric is inserted into an isolated capacitor, voltage does this.
Decreases
A hollow conducting shell has charge +Q on its outer surface. A +q charge is placed inside the cavity. The induced charge on the inner wall becomes this.
What is -q?
A capacitor initially uncharged is connected to a battery. As charge accumulates, the electric field between plates does this. (think graphical relationship)
Increases linearly with charge
Two identical capacitors are connected in series to a battery. Each capacitor has voltage V across it initially. If one capacitor is removed, the voltage across the remaining capacitor becomes this.
2V
If plate separation doubles while the capacitor remains connected to a battery, stored energy does this.
Doubles
The process that explains behavior of dielectrics.
Polarization