Conceptual Physics-Electricity Unit- Quiz 2 (Ohm's Law) Flashcards Preview

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Flashcards in Conceptual Physics-Electricity Unit- Quiz 2 (Ohm's Law) Deck (20):
1

Voltage

energy used to move electrons (energy per charge); the "push"; can be used to run devices; symbol V

2

Voltage is measured in...

volts; symbol V

3

Current

flow of charges (electrons) through conductors; speed of charges; amount of charges going past a point in one second; symbol I

4

Current is measured in...

Amperes or Amps; symbol A

5

Resistance

opposition of a material to the flow of charges; a resistor is something that slows down current; symbol R

6

Resistance is measured in...

Ohms; symbol Omega:
Ω

7

The relationship between Current and Resistance...

is an inverse relationship- if one goes up, the other goes down, and vice versa. (considering Voltage is constant)

8

The relationship between Current and Voltage...

is a direct relationship- if one goes up, so does the other, and vice versa. (considering Resistance is constant).

9

How is a voltmeter wired into a circuit?

in parallel

10

How is an ammeter wired into a circuit?

in series

11

Ohm's Law

describes the relationship among voltage, current, and resistance;
Mainly V=IR or Voltage is equal to Current times Resistance
Also: I=V/R and R=V/I

12

What are the differences between Parallel and Series circuits?

In series, Resistances add; In parallel, Resistances are multiplied and then divided by their sum
In Series, voltage adds; in parallel, Voltage doesn't ?
In series, there is only one path; In parallel, there are multiple paths
In series, adding devices slows the current (if the voltage is constant), and they dim consecutively; In parallel, the current remains constant in all the bulbs.

13

CirSym:
Conductor or Wire

line

14

CirSym:
Connection

dot on line

15

CirSym:
Bulb

line going up into an "M" shape within a circle

16

CirSym:
One cell or battery

line ending in a short perpendicular dash, then a gap, then a longer perpendicular dash, then the line continues. For multiple batteries, add short and long dashes with gaps then continue line.

17

CirSym:
Switch

Open: line with a connection on the end, then a tilted line only connected to the other side (with a connection)
Closed: line with two consecutive connections

18

CirSym:
Resistor

3 Zig Zags: above line, below, all the way above, all the way below, all the way above, then back down to original level of wire and continue line

19

CirSym:
Ammeter, Voltmeter, Generator

A, V, or G within circle on wire

20

Bonus: What is the equation for parallel resistance?

(R1xR2xR3...)/(R1+R2+R3...)
If all resistors the same, do R to the power of one less than the amount of resistors, divided by amount of resistors:
RxRxRxR...
4 x R
R's cancel

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