Current Electricity Test 

What is on the test?

Chapter 10 

bulletLighting a Bulb...how do you use one cell, one wire, and one bulb to create light? p323

 

bulletCircuit Symbols...know the symbol for conducting wire, cell, battery, light bulb, resistor, switch ammeter and voltmeter.  Be able to draw a circuit diagram using these symbols.

 

bulletBe able to describe what current, charge, Potential Difference (voltage), and resistance are.  Be able to use formula to solve for each of these things and to understand the relationships between them.
bulletI=Q    current = charge moving past a point       Amp = coulomb
bullet   t                                        time                                   second

 

bulletV=E   Potential difference = Energy        Volt =   Joules_
bullet    Q                                       Charge                  Coulomb

 

bulletR=V    resistance = potential difference     Ohm = Volts
bullet    I                                 current                            Amps

 

bulletStudy your labs 10-A  Measuring Current, p326-327, 10-B Energy Around a Simple Circuit p. 334-335, and 10-C Potential Difference and Current for a Resistor p. 340-341...for 10-C look at both labs...using spool resistors (resistance coils) and using ceramic resistors.

 

Chapter 11

 

bulletStudy Starting Point Lab for Chapter 11, Dimming the Bulb

 

bulletBe able to compare Series and Parallel circuits.
bullet
Series Circuits Parallel Circuits
Only one pathway for electrons Two or more pathways for electrons
Increasing resistance decreases current Increasing resistance by increasing # pathways will increase current
Current the same everywhere in circuit Current may be different on each path of circuit
Increasing voltage increases current Increasing voltage increases current
Bulbs same brightness Bulbs may not be same brightness
   

 

 

bulletBe able to figure the brightness of bulbs in a circuit...you can use Jessome's Law if you want.  This was the How Bright Are You exercise:

 

bulletNumber of Cells_____= Brightness     =1 is Standard;  <1 is less bright; >1 is more bright
bulletNo. of Bulbs on pathway

       If the bulb is on more than one pathway, then do the math for each pathway and add up the results to determine brightness.

bullet