Real Lab Electric Circuit Exploration Answer questions 12-17. write neat please
ID: 1651470 • Letter: R
Question
Real Lab Electric Circuit Exploration
Answer questions 12-17. write neat please no cursive
Materials Needed
Three 1.5-V batteries
Christmas mini lights (you can check with your family, friends, school, neighbors, to get some used, only partially functioning or you can get some for sale very close to or after Christmas): you should have about 10 mini light bulbs
Masking tape
wire snips or strong scissors to cut the mini light wires.
How to Prepare the Mini Lights
Cut from the strand of mini lights the following sections:
1 section with three light bulbs
2 sections with two light bulbs
3 sections with one light bulb
Procedure I
1 Strand--1 Light Bulb--1 Battery
Tape one end of the wire with one light bulb to one end of one battery
Hold the other end of the wire to the other end of this battery and observe how bright the light shines
1 Strand--2 Light Bulbs--1 Battery
Tape one end of the wire with two light bulbs to one end of the other battery
Hold the other end of the wire to the other end of this battery and observe how bright the lights shine
1 Strand--3 Light Bulbs--1 Battery
Tape one end of the wire with three light bulbs to one end of the other battery
Hold the other end of the wire to the other end of this battery and observe how bright the lights shine
Procedure II
2 Strands--1 Light Bulb each--1 Battery
Use two strands with one light bulb and tape one of their ends of the wire to one end of one battery
Hold the other two ends of the wire to the other end of this battery and observe how bright the lights shine
3 Strands--1 Light Bulb each--1 Battery
Use three strands with one light bulb and tape one of their ends of the wire to one end of one battery
Hold the other three ends of the wire to the other end of this battery and observe how bright the lights shine
2 Strands--2 Light Bulbs each--1 Battery
Use two strands with two light bulbs and tape one of their ends of the wire to one end of one battery
Hold the other two ends of the wire to the other end of this battery and observe how bright the lights shine
Procedure III
1 Strand--3 Light Bulbs--1 Battery
Use one strand with three light bulbs and tape one end of the wire to one end of one battery
Hold the other end of the wire to the other end of this battery and observe how bright the lights shine
1 Strand--3 Light Bulbs--2 Batteries
Connect another battery to the first one - you can tape the two together. Make sure that you connect positive and negative ends of batteries and not two positive or two negative ends.
Hold the other end of the wire to the other end of the second battery and observe how bright the lights shine
1 Strand--3 Light Bulbs--3 Batteries
Connect another battery to the first second one - you can tape the two together. Make sure that you connect positive and negative ends of batteries and not two positive or two negative ends.
Hold the other end of the wire to the other end of the third battery and observe how bright the lights shine
Resistors in Series
Watch this video about resistors in series and answer the following questions:
https://www.khanacademy.org/science/physics/circuits-topic/circuits-resistance/v/circuits-part-2
Resistors in Parallel
Watch this video for resistors in parallel and answer the following questions:
https://www.khanacademy.org/science/physics/circuits-topic/circuits-resistance/v/circuits-part-3
Draw a circuit diagram for each of these two circuits. Be sure to label each component.
If the resistors were two regular, incandescent light bulbs instead of resistors:
In the series circuit, if one light bulb burned out, what change would you see in the light from the other light bulb?
In the parallel circuit if one light bulb burned out, what change would you see in the light from the other light bulb?
Household Circuits
Household circuits have many similarities to what we have discussed so far, the big difference is that we have higher voltages as compared to what we get from the batteries and that the current does not flow in one direction but changes the direction many times per second. The current coming from a battery is called direct current and we abbreviate it usually with DC. The current coming directly from an outlet isalternating current and we abbreviate it usually with AC. The number of cycles of changing direction per second is again called frequency. When the currents alternate, the voltages alternate, too.
Electricity Around the World
Answer the Questions 16 and 17. DO NOT WRITE IN CURSIVE. PLEASE WRITE NEAT...
Q16. Below are some common symbols used to represent components in an electric circuit. What component do each of these symbols represent?
1.
2.
3.
4.
5.
Q17. Using the Formula Reference Sheet, calculate the answer for each of the following parts of this question.
A series circuit has three resistors, R1 = 2 (ohms), R2 = 4 , and R3 = 1 . What is the total resistance of the circuit?
If the resistors in question 1 are connected to a 14 volt battery, what will the current through the circuit be?
A flashlight has two 1.5 volt batteries connected in series, what is total voltage of the flashlight?
If the flashlight has two 1.5 volt batteries connected in parallel, what is the total voltage of the flashlight?
If the current in a circuit is 1.5 amps, and the resistance is 10 ohms, what voltage is the power supply?
Describe the circuit below. Which light bulbs will be lit?
1.
2.
3.
4.
5.
Explanation / Answer
Question 16)
1) Electric Bulb
2) Resistor
3) ac source
4) resistor
5) key
--------------------------------------
Q17)
R1= 2 ohm ,R2 = 4 ohm and R3 = 1 ohm
then total resistance is Rnet = R1+R2+R3 = 2+4+1 = 7 ohm
if V = 14 volt then
current i = V/R = 14 / 7 = 2 A
A flashlight has two 1.5 volt batteries connected in series,what is total voltage of the flash light
then total voltage is V = 1.5+1.5 = 3 V
if connceted in parallel,the total voltage of the flashlight is V = 3 V
if curent i = 1.5 amp
and R = 10 ohms then
V = i*R = 1.5*10 = 15 V
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