Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance? 27.2 mA 590 mA 5.9 mA 59 mA TRUE ANSWER : ? YOUR ANSWER : ?
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately 31 385 38.5 3.1 TRUE ANSWER : ? YOUR ANSWER : ?
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms. 2 4 20 40 TRUE ANSWER : ? YOUR ANSWER : ?
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver? 2 mA 21.4 mA 2.2 mA 214 mA TRUE ANSWER : ? YOUR ANSWER : ?
What is the voltage source for a circuit carrying 2 A of current through a 36 resistor? 18 V 7.2 V 1.8 V 72 V TRUE ANSWER : ? YOUR ANSWER : ?
What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing? 6.6 66 183 18.3 TRUE ANSWER : ? YOUR ANSWER : ?
When 12 V are applied across a 68 resistor, the current is 8.16 mA 816 mA 17.6 mA 176 mA TRUE ANSWER : ? YOUR ANSWER : ?
How much current is produced by a voltage of 18 kV across a 15 k resistance? 1.2 A 120 mA 12 A 12 mA TRUE ANSWER : ? YOUR ANSWER : ?
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source? 23 9.7 230 97 TRUE ANSWER : ? YOUR ANSWER : ?
How much voltage is needed to produce 2.5 A of current through a 200 resistor? 8 V 500 V 50 V 80 V TRUE ANSWER : ? YOUR ANSWER : ?