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Question 1

Kirchoffs current law

Answer 1

Current going into a closed circuit region = current flowing out

Currents flowing out of any closed region of a circuit sim to zero

Charge can not accumulate

Question 2

Kirbb Co offs voltage law

Answer 2

Sum of voltage changes around any closed loop is zero

Question 3

What’s a branch

Answer 3

Something coming out of a node

E.g. you have a node with 3 wires coming out

Question 4

For a circuit with N nodes and S sources, how many simultaneous equations?

Answer 4

N-S-1

Question 5

What’s an ideal voltage source?

Answer 5

Maintains same value of V for all currents. Vertical line with infinite gradient on I/V graph

Question 6

What’s an ideal current source?

Answer 6

Maintains the same value of I for all voltages. A horizontal line on I/V graph with zero gradient. I is negative?

Question 7

Components in series share the same…

Answer 7

Current

Question 8

Components in parallel share the same…

Answer 8

Voltage

Question 9

What’s RMS

Answer 9

Value of an ac voltage or current that’s the equivalent dc voltage or current that dissipates the same power in a resistor

Question 10

Open circuit voltage

Answer 10

If I = 0
X intercept 0
V oc = V Th

Question 11

Short circuit current

Answer 11

If v = 0
Y intercept = x
I sc = - V Th/ R Th

Question 12

Thevenin resistance

Answer 12

dI/dV = 1/R Th

Question 13

Max power when

Answer 13

Rth = RL

Question 14

When is thevenin applicable?

Answer 14

When you have fixed voltage/current sources

Question 15

What happens when you make the time constant bigger than the period?

Answer 15

Wave flattens

Question 16

Bigger time constant than period but CR circuit

Answer 16

Wave form is very similar to original as it doesn’t have time to charge and discharge

Question 17

Corner frequency (p) =

Answer 17

1/RC

1/tau

Question 18

What’s a low pass filter?

Answer 18

Allows low frequencies to pass but attenuates (makes smaller) high frequencies