Electric Circuit

Question 1

__________ and ____________ are connected by conducting wires through which electric charges moves.

Answer 1

energy source
energy consuming device

Question 2

a _________ occurs that transfers electron from one terminal to another terminal.

Answer 2

chemical reaction

Question 3

the maximum potential difference across the terminals

Answer 3

Electromotive Force (emf)

Question 4

the amount of charge per unit time that passes through a surface that is perpendicular to the motion of the charges.

Answer 4

Electric Current

Question 5

If the charges moves around the circuit in the same direction at all times, the current is said to be ______

Answer 5

Direct Current

Question 6

If the charges move first one way and then be oposite way, the current is said to be

Answer 6

Alternating Current

Question 7

the hypothetical flow of positive charges that would have the same effect in the circuit as the movement of negative charges that actually does occur.

Answer 7

Conventional Current

Question 8

defined as the ratio of the voltage V pplied accross a piece of material to the current I through the material.

Answer 8

Resistance R

Question 9

SI unit of Resistance

Answer 9

Volt/ Ampere (V/A) = ohm

Question 10

the ratio V/I is a _________, where ______ is the voltage applied accross a piece of material and ____ the current through the material

Answer 10

constant
V
I

Question 12

Electrical Conductor = _ resistivity

Answer 12

low

Question 13

Electrical Insulators = ____ resistivity

Answer 13

high

Question 14

there is current in a circuit as result of a voltage, the electric power delivered to the circuit is :

Answer 14

P = IV

Question 15

SI unit of Power

Answer 15

Watt (w)

Question 16

There are many circuits in which more than one device is connected to a voltage source.

Answer 16

Series Wiring

Question 17

it means that the devices are connected in such a way that there is the same electric current through each device.

Answer 17

Series Wiring

Question 18

Series Wiring

Wiring: each resistor on the ________ wire.
Voltage: _______ for each resistor.

Answer 18

same
different

Question 19

Series Wiring

Current: _____ for each resistor
Resistance: ___________

Answer 19

same
Increases

Question 20

Parallel Wiring

Wiring: Each resistor on a __________ wire.
Voltage: ___ for each resistor.

Answer 20

different
same

Question 21

Parallel Wiring

Current: _______ for each resistor
Resistance: ______________

Answer 21

same
Decreases

Question 22

Current (I) Formula

Answer 22

I = Voltage / Resistor

Question 23

Power (P) Formula

Answer 23

P = Current (I) ^2 / Resistor

Question 24

it means that the device are connected in a such a way that the same voltage is applied accross the device.

Answer 24

Parallel Wiring

Question 25

When two resistor are connected in ________, each receives current from the battery as if the other was not present.

Answer 25

Parallel

Question 26

the two resistor connected parallel draw more ____ than does either resistor alone.

Answer 26

Current

Question 27

Batteries and generators add some resistance to a circuit. This resistance is called ________

Answer 27

Internal Resistance

Question 28

The actual voltage between the terminals of battery

Answer 28

Terminal Voltage

Question 29

One alternative to the series-parallel method is to take advantage of Kirchoff’s rules named after their developer ______

Answer 29

Gustav Kitchoff (1824 - 1887)

Question 30

The two rules, ___________ and ______________ and both arise from principles and ideas that we have encountered earlier.

Answer 30

Junction Role
Loop Role

Question 31

it states that the total current directed into a junction must equal the total current directed out of the junction.

Answer 31

Junction Rule

Question 32

express conservation of energy in terms of the electric potential and states that for a closed circuit loop, the total of all potential rises is the same as the total of all potential drops.

Answer 32

Loop Rule