Chapter 6 - Cirtcuits Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Current equation on SI unit

A

I = Q/∆t

the ampere: 1A = 1 C/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Potential difference

A

Voltage

1V = 1J/C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

EMF

A

Not actually a force, it is the potential difference when no charge is moving between the two terminals of a cell that are at different potential values

Think in terms of:
Pressure to move

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Kirchhoff’s junction rule

A

Current into junction = current out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Kirchhoff loop rule

A

All the voltage gets used up around a closed circuit

*conservation of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Three properties of resistors summarized in the resistor equation

A

R = pL/A

p= résistivité
L = length of resistor
A = cross-sectional area
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does temp affect resistance ?

A

Most conductors have greater resistance at higher temp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Ohm law

A

V= IR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Power

A

rate at which energy is transferred or transformed

P = W/t = ∆E/t

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How can you calculate the power of a resistor

A

P = IV

= I^2R = V^2/R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Does current change when it encounters a resistor or capacitor?

A

No

**potential energy changes (voltage)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How are capacitors in series calculated ?

A

1/Ct = 1/C1 + 1/C2+…

Like resistors in PARALLEL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How to calculate capacitors in parallel

A

Ct = C1+ C2 +…etc

Like resistors in series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Capacitance equation

A

C = Q/V

Capacitance (a Farad = 1C/V)

Q = charge (coulombs)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Équation for parallel plate capacitance

A

C = E0 (A/D)

E0 (Epsilon) = a constant given to us

A = area of overlap on plates

D = distance between plates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What direction do we define an electric field to be?

A

Positive to negative

17
Q

How do we find the magnitude of an electric field (through parallel plates)?

A

E = V/d

18
Q

How do we measure potential energy of capacitors ?

A

U = .5CV^2

19
Q

What are dielectric materials?

A

Insulators

increases capacitance

C’ = kC

C = original capacitance 
k = insulator constant