Circuits

Question 1

Direction of Current

Answer 1

the current is in the direction that the positive charge would flow, or from hight to low potential

Question 2

Ohm’s Law Equation

Answer 2

V=IR

Question 3

Resistance Definition

Answer 3

opposition to the flow of charge

Question 4

Resistance Equation

Answer 4

R = pL / A

Question 5

Kirchhoff’s Laws

Answer 5

1. At any junction within a circuit the sum of current flowing into that point much equal the sum of current leaving
2. The sum of voltage sources equals the sum of voltage drops around a closed-circuit loop

Question 6

Power Disipated by Resistors Equation

Answer 6

P= IV = I^2R

Question 7

Capacitance definition and Equation

Answer 7

the ability to stare charge per unit voltage

C= Q/V

Question 8

Energy stored by capacitors equation

Answer 8

U= 1/2 QV

Question 9

Resistors in Series _____ the overall voltage and _________ the resistance

Answer 9

decrease, increase

Question 10

Resistors in Parallel _______ the overall voltage and _______ the resistance

Answer 10

increase , decrease

Question 11

Ammeters

Answer 11

measure the current at a point within the circuit, ideal ammeters have no resistance

Question 12

Voltmeters

Answer 12

measure the voltage drop across 2 points in a circuit, ideal voltmeter has infinite resistance

Question 13

Ohmmeters

Answer 13

only one circuit element is analyzed and the circuit is not active, calculates resistance