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Calculating – Ohm’s Law Problems I = current (amperes) amp V = voltage (volts) V R = resistance (Ohms) Number ______________ Name _______________________________ Hour _____________ Date ______________ 1._________________________ What is the current produced by a potential difference of 240 V through a resistance of 0.2 ? Looking for: Given: 2. _________________________ What resistance would produce a current of 120 amps from a 6 V battery? Looking for: Given: 3._________________________ What voltage is necessary to produce a current of 200 amps through a resistance of 1.0 x 10-3 ? Looking for: Given: 4. _________________________What is the current produced by a 9 V battery flowing through a resistance of 2.0 x 10-3 ? Looking for: Given: 5. __________________________ What is the potential difference if a resistance of 25 produces a current of 250 ams? Looking for: Given: 6. __________________________ How many amperes will a 6 V battery send through a 3 circuit? Looking for: Given: 7. A light bulb draws 0.5 amps on a 10 V line. (a) What is the resistance of the light bulb? (b) If you plugged the bulb into a 110 V line, what would the current be? (c) How much additional resistance would you have to put in series with a bulb in (a) so it will only draw 0.5 amps on the 110 V line? (a) ______________________________ Looking for: Given: (b) ______________________________ Looking for: Given: (c) ______________________________ Looking for: Given: 8. A parallel circuit has four similar lamps, each on its own branch of the circuit. Each lamp draws 1 amp on a 110 V line. (a) What is the total current used by all four lamps? (b) What is the resistance of each lamp? (a) ________________________________ (b) ________________________________ 9.__________________________________ A piece of copper wire 300 m long has a resistance of 1 ohm. About how much current is sent through 900 m of copper wire of the same thickness by a 3 V battery?