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Chapter 6. Ohm’s Law, Work, Energy and Power. V = ? V I = 4 Amps R = 4 Ohms. 16 V. V = ? V I = 2 Amps R = 4 Ohms. 8 V. V = ? V I = .2 Amps R = 5 Ohms. 1 V. V = ? V I = 4 mA R = 4 mOhms. 16 uV. V = ? V I = 14 Amps R = .5 Ohms. 7 V. I = 5 uA R = 4 MOhms V = ? V. 20V.
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Chapter 6 Ohm’s Law, Work, Energy and Power
V = ? V I = 4 Amps R = 4 Ohms 16 V
V = ? V I = 2 Amps R = 4 Ohms 8 V
V = ? V I = .2 Amps R = 5 Ohms 1 V
V = ? V I = 4 mA R = 4 mOhms 16 uV
V = ? V I = 14 Amps R = .5 Ohms 7 V
I = 5 uA R = 4 MOhms V = ? V 20V
V = ? V I = 3 mA R = 2 kΩ 6V
V = ? V I = 5 nA R = 1.5 GΩ 7.5V
V = ? V I = 5 A R = 1.5 Ω 7.5V
V = 6 V I = 3 A R = ? Ω 2 Ohms
V = 6 V I = 3 A R = ? KΩ .002 Kohms
Now Use your Calculator See page 91 in book Do Example 6.2
Using your Calculator V = 6 V I = ? A R = 3 Ω 2 Amps
Using your Calculator V = 6 V I = ? mA R = 3 Ω 2000 mA
Using your Calculator V = 10 mV I = 2 mA R = ? mΩ 5000 mOhms
Using your Calculator V = 10 mV I = 2 mA R = ? Ω 5 Ohms
Using your Calculator V = 10 mV I = 2 mA R = ? MΩ .000005 MOhms
Using your Calculator V = 10 x 10-4V I = 2 mA R = ? MΩ .0000005 MOhm 5 x 10^-7 MOhm
Using your Calculator V = 10 x 10-4V I = 2 x 10-3A R = ? MΩ .0000005 MOhm 5 x 10^-7 MOhm
Work What is work? Motion must take place for work to take place Work takes place when electrical energy is converted to mechanical energy and vice versa What is the unit for work? Joule (J) (This is also the same unit for Energy) What about electrical work? (no motion involved?) 1 Joule = Energy required to raise 1 Coulomb of charge through a potential difference of 1 Volt
Work What is the equation for work? W = Q * V Work = Charge * Voltage Joules = Coulombs * Volts
Power What is Power? Power is how much work can be done in a specific amount of time (Like MPH) Units for Power is Watts (W) (Like MPH) W = Q * V
Power Equation for Power Power = Work / Time (Like MPH) Power = Voltage * Current P = V * I
Power See how Power also equals: P = V2/R P = I2 * R
P = V * I P = V2/R Power P = I2 * R P = ? Watts I = 6 Amps V = 3 Volts P = 18 Watts
P = V * I P = V2/R Power P = I2 * R P = 18 Watts I = 6 Amps V = 3 Volts R = ? Ω R = .5 Ohms
P = V * I P = V2/R Power P = I2 * R P = ? Watts I = 5 Amps V = 50 Volts V = ? Volts R = 10 Ohms P = 250 Watts
P = V * I P = V2/R Power P = I2 * R P = ? Watts V = 3 Volts R = 9 Ω P = 1 Watts
P = V * I P = V2/R Power P = I2 * R P = 32 Watts R = 2 Ω I = ? A I = 4 Amps