Electricity

Question 1

Coulombs law

Answer 1

F=k (Q1xQ2)/R

Question 2

Charge of an electron

Answer 2

-1.6x10^-19

Question 3

Current is equal to

Answer 3

Q=IT

Question 4

Ohms law

Answer 4

The ratio of the potential difference to current is constant

Question 5

The 4 Equations of voltage and power

Answer 5

V=IR
P=IV
P= (I^2)R
P=(V^2)/R

Question 6

What is potential difference?

Answer 6

Potential is the voltage used by a component

Question 7

Temperature-dependent resistance

Answer 7

R(t)=R(To)(1+a(T-To)) where a is the temperature coefficent

Question 8

Parallel resistance

Answer 8

Rt= (R1)(R2)/R1+R2

Question 9

Series resistance

Answer 9

Rt=R1+R2+R3

Question 10

Voltage divider rule

Answer 10

Vr1=R1/(R1+R2+R3) X V

Question 11

Current divider rule

Answer 11

I2=R1/(R1+R2)xI Two branches only, Parallel.

Question 12

Describe kirchoffs current law

Answer 12

The algebraic sum of any node is 0

Question 13

Describe kirchoffs voltage law

Answer 13

The voltage sum of any loop is zero

Question 14

Ideal voltage source is measured in

Answer 14

Series

Question 15

Ideal current source is measured in

Answer 15

Parallel

Question 16

An ideal source has no

Answer 16

Resistance

Question 17

Describe Thevenins Theory

Answer 17

1) Remove Load, Calculate open voltage Vt
2) Remove Load, short circuit, replace current source with open circuit, calculate Rt
3) Form Thevenins equivalent circuit
4) To find load current, connect the load resistor to Thevenins equivalent circuit, carry out current equation I=V/R

Question 18

Period of a wave

Answer 18

T=1/F

Question 19

Equation of a general sinusoid

Answer 19

V(T)=VmSIN(ωt+Φ) ω=Angular frequency Φ=Phase shift

Question 20

Equations for a Non Inverting Op-Amp

Answer 20

Av=1+Rf/Ri Vo=(1+Rf/Ri)Vi

Question 21

Equations for a Inverting Op-Amp

Answer 21

A= - (Rf/Ri) Vo= - (Rf/Ri)Vi

Question 22

Equations for a Summing Op-Amp

Answer 22

Av=Rf/(Rn/i) Vo=-Rf(((V1/R1)+V1/R2)+V1/R3)

Question 23

Equations for a Differential Op-Amp

Answer 23

Av=Rf/Ri AvVo/(V2-V1) Vo=Rf/Ri(V2-V1)

Question 24

what is slew rate and its equation

Answer 24

The rate at which a square wave reaches its peak. Max slope from normal = Slew rate

Question 25

order of operation in boolean algebra

Answer 25

Inversion
AND
OR