Lesson-1

Question 0

What’s the measure unit of q?

Answer 0

Coulomb

Question 1

Which are the circuit variables?

Answer 1

1.charge 2.current 3.power 4.voltage 5.energy

Question 2

How much is e?

Answer 2

(-)1.6*10^(-19)

Question 3

What’s reference direction?

Answer 3

Direction of q+ charge

Question 4

When does deltaq have meaning?

Answer 4

After I put reference direction

Question 5

What does deltaq depend from?

Answer 5

Deltaq dependens from the time in which deltaq net charge is transferred

Question 6

What’s i(t)?

Answer 6

i(t) is a lim(deltat->0) (deltaq/deltat)

di(t)=dq/dt

Question 7

What’s the measure unit of current i(t)?

Answer 7

C/S=A Ampere

Question 8

Which is the verse of e?

Answer 8

The opposite of the current i(t) verse

Question 9

What’s the total amount of charge transferred between [0,t]?

Answer 9

q(t)=integral[0,t] of i(t) dt

Question 10

What’s derivation of q(t)?

Answer 10

It’s i(t)

Question 12

What are the submultiplies of ampere?

Answer 12

mA 10^(-3)

µA 10^(-6)

nA 10^(-9)

pA 10^(-12)

Question 13

What’s DC current?

Answer 13

it’s a direct current given by the non-variation of i(t) during the time

Question 14

What’s AC current?

Answer 14

it’s a alternate current given by the variation of i(t) during the time

Harmonic Motion

i(t)=I_p*cos(wt+ß)
w=2π/T

Question 15

What’s E_a,b?

Answer 15

E_a,b is the Potential Energy

Question 16

What’s v?

Answer 16

v is the voltage
v=lim(deltaq->0) (deltaE/deltaq)

dv=dE/dq

v_a,b=(E_a-E_b)/deltaq

Question 17

What’s local reference?

Answer 17

Local Reference is the point che we assume like principal Referiment (the point zero for example)

Question 18

What’s the value of v in this case?

Answer 18

v=-v1

Question 19

What’s v*i?

Answer 19

v*i=dE/dq * dq/dt =dE/dt=P

Question 20

What’s the measure unit of Power?

Answer 20

Watt

Question 21

What’s a ideal wire?

Answer 21

A wire without loss of deltaq

Question 22

What’s a Normal Sign Reference?

Answer 22

It is a situation where the v has opposite verse that i

That is verify with Lamps, P absorbed by Device

Question 23

What’s a Non-Normal Sign Reference?

Answer 23

It is a situation where v has same verse that i

That is verify with generetors, P supplied by Device