# This is Jeopardy Electricity 1 Static Electricity Electric

- Slides: 28

This is Jeopardy Electricity 1

Static Electricity Electric Fields Electricity Circuits Miscellaneous 100 100 100 200 200 200 300 300 300 400 400 500 500 (static electricity) Final Jeopardy 2

Define static electricity The accumulation of excess electric charges on an object Back 3

What are the possible charges on object attracted to a negatively charged rod? Positive or Neutral Back 4

After rubbing a balloon to your head it clings to the wall. What are the forces acting on the balloon? Which force is greater Gravitational force and electrical force Electrical force is greater Back 5

Two charges, 2. 3 x 10 -5 C and -3. 2 x 10 -5 C are 0. 034 m apart. What is the force between the two particles? -5730 N Back 6

The magnitude of the attractive force between two objects is 46 N. One has a charge of 1. 8 x 106 C and the other of -1. 4 x 10 -6 C. How far apart are the two objects? 0. 02 m Back 7

Draw the electric field emanating from a positive charge. From a negative charge? Back 8

Draw the electric field lines between the following charges. + + - Back 9

A force of 25 N exists on charge q, which is 2. 0 x 10 -19 C. What is the magnitude of the electric field. 1. 25 x 1020 N/C Back 10

What is the magnitude of charge on a test charge that experiences of a force of 1. 5 x 108 N at a point where the electric field intensity is 6. 0 x 10 -4 N/C. 2. 5 x 10 -5 C Back 11

Use Coulomb's Law to explain why an attractive force is always negative. Back 12

Define an electric current Flow of charged particles Back 13

The current through a 12 V car battery is 210 A. Calculate the power of the car in kilowatts. 2. 52 k. W Back 14

A 50 W lamp is connected to a 120 V power source. Calculate the resistance of the lamp. 288 Ω Back 15

What energy (in kilojoules) is required to charge your phone for 40 minutes in a 120 V outlet receiving a 0. 3 A current? 86. 4 k. J Back 16

A 20 -V car heater takes 15 minutes to heat a car to a specific temperature. How long would it take a 60 -V unit operating with the same current take to accomplish the same task? 5 minutes Back 17

Give the following equations for a series circuit Voltage Across a Resistor Total Voltage of Circuit V 1=R 1∙ I Vtotal=V 1+V 2+V 3 Current through Total Current Resistance Resistor through Circuit I constant I=Vtotal / Rtotal = R 1 + R 2 +R 3 Back 18

Give the following equations for a parallel circuit Voltage Across a Resistor Total Voltage of Circuit Current through Resistor V constant V = Rtotal ∙Itotal I 1=V / R 1 Total Current Resistance through Circuit Itotal=I 1+I 2+I 3 1/Rtotal=1/R 1+1/R 2+1/R 3 Back 19

Calculate the total current flowing through the circuit? R 1=10Ω R 2=20Ω R 3=15Ω 0. 33 A Back 20

Calculate the total current, and the current through R 1, R 2, & R 3. 20 V Back R 1= 10Ω R 2= 20Ω R 3= 15Ω I 1 = 2. 0 A, I 2 = 1. 0 A, I 3 = 1. 33 A Itotal=4. 33 A 21

Calculate the effective resistance of R 2, 3 and draw the equivalent circuit. Calculate the total current of the circuit. Determine the reading a voltmeter placed across R 1=10Ω 15 V Back R 2= 20Ω R 3= 60Ω R 2, 3 = 15 Ω Itotal = 0. 6 A, V 1 = 6 V 22

What is the unit of power and time electrical companies use to measure energy expended in a household? Kilowatt-hours Back 23

How many current paths are present in a circuit if three resistors are connected in a parallel circuit? three Back 24

Name three sources of electrical energy. Thermal, Geothermal, Nuclear, Hydroelectric, Solar, Wind Back 25

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Calculate the total effective resistance of the following circuit. Back 193 Ω End Game 28

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