Voltage And Current Sensors

Question 1

Ohm’s law

Answer 1

R = V/I

Question 2

Kirchoff’s voltage law

Answer 2

Voltages across each circuit element in a closed loop of a circuit should add to zero

Question 3

Kirchoff’s current law

Answer 3

Sum of currents into a node equals the sum of currents exiting the node

Question 4

Instantaneous power

Answer 4

VI, V^2/R, I^2R

Question 5

How does reactive power occur

Answer 5

If there are inductive and capacitive circuit elements since they absorb energy for a period of time then release the energy during the remainder of time

Question 6

Real power (definition)

Answer 6

Average of instantaneous power over a time period

Question 7

Real power (equation)

Answer 7

V^2(peak)/2R

Question 8

Apparent power (equation)

Answer 8

|S| = V(rms)I(rms)

Question 9

Power factor

Answer 9

P/|S| (real power/ apparent power

Question 10

Reactive power

Answer 10

Measure of energy circulating back and forth in the circuit

Question 11

Reactive power (equation)

Answer 11

Root(apparent power^2 - real power^2)

Question 12

Complex power

Answer 12

S = P + jQ

Question 13

In DC Circuits operating at steady state what power is there?

Answer 13

Real power

Question 14

In AC Circuits operating at steady state what power is there?

Answer 14

Real power (P in W), reactive power (Q in VAR), apparent power (|S| in VA)

Question 15

Peak value of voltage or current

Answer 15

RMS value x root(2)

Question 16

Peak-to-peak value of voltage or current

Answer 16

RMX value x root(2) x 2