Chapter 6 Electromechan e r m m c a a ni cal a S Sy s st ems e s 145 45 Copyright Goodheart-Willcox Co., Inc. Copyright Goodheart-Willcox Co., Inc. 6. A television circuit draws 0.15 ampere of current. The operating voltage is 120 volts. What is the resistance of the circuit? 7. The resistance of the motor windings of an electric vacuum cleaner is 20 ohms. If the voltage is 120 volts, what is the amount of current drawn? 8. The coil of a relay carries 0.05 ampere when operated from a 50-volt source. Find its resistance. 9. How much current is drawn from a 12-volt battery when operating an automobile horn of 8 ohms resistance? 10. Find the resistance of an automobile starting motor if it draws 90 amperes from the 12-volt battery. 11. What current is drawn by a 5000-ohm electric clock when operated from a 120-volt line? 12. Find the current drawn by a 50-ohm toaster from a 120-volt line.