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Name: ____________________________________ Resistance, Current, Voltage, Power and Energy Worksheet Q = charge (C) I = current (A) t = time (s) E = energy (J) P = power (W) V = voltage (V) R = resistance (Ohm or )) 1) The total amount of charge that passes through a wire's full cross section at any point per unit of time is referred to as _____________________. A) voltage B) current C) electric potential D) wattage. 2) The resistance of a wire is defined as ______________________. A) I x V B) V/I C) I/V D) none of the given answers 3) What is 1 Ω equivalent to? A) 1 V∙A B) 1 W/A C) 1 J/s D) 1 V/A 4) What is 1 W equivalent to? A) 1 V/Ω B) 1 Ω∙A C) 1 V∙A D) 1 V/A 5) A kilowatt-hour is equivalent to A) 3,600,000 J/s B) 1000 W C) 3600 s D) 3,600,000 J. 6) How much charge must pass by a point in 10 s for the current to be 0.50 A? A) 0.050 C B) 5.0 C C) 20 C D) 2.0 C 7) What potential difference is required to cause 4.00 A to flow through a resistance of 330 Ω? A) 334 V B) 12.1 V C) 1320 V D) 82.5 V 8) What is the voltage across a 5.0Ω resistor if the current through it is 5.0 A? A) 25 V B) 4.0 V C) 100 V D) 1.0 V 9) A light bulb operating at 110 V draws 1.40 A of current. What is its resistance? A) 109 Ω B) 78.6 Ω C) 12.7 Ω D) 154 Ω 10) 5.00 A is flowing through an 10.0 Ω resistor. How much power is being dissipated? A) 50.0 W B) 500 W C) 250 W D) 2.50 kW 11) A 110-V hair dryer is rated at 1200 W. What current will it draw? A) 0.090 A B) 1.0 A C) 12 A D) 11 A 12) A lamp uses a 150-W bulb. If it is used at 120 V, what current does it draw? A) 1.25 A B) 0.800 A C) 8 kA D) 150 A 13) How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energy costs $0.08/kWh? A) $0.25 B) $1.50 C) $0.16 D) $0.016 14) A 100-W driveway light bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb. A) $73.00 B) $3.65 C) $7.30 D) $36.50 15) Label which circuit is in series and which is in parallel: 16) Label which circuit is in series and which is in parallel: 17) Draw a series circuit with one 9 Volt battery, 1 resistor and a current of 0.5 A. What is the resistance of the resistor? 18) Are the circuits below in series or in parallel? ___________________________ _____________________________ 19) Use the following terms to label the circuit diagram below: power source, switch, light bulb, and wire. 20) Use the following terms to label the circuit diagram below: power source, resistors, ammeter, voltmeter, light bulb, and switch.