ENVIRONMENTAL ENGINEERING IN CE QUIZ

The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately

112

1.2

18

11.2

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Approximately how much current flows through a 3.3 M resistor across a 30 V source?

90 A

9 A

900 A

9000 A

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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.

40

20

4

2

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If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?

82.5 V

14.6 V

146 V

8.25 V

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A current of 200 µA through a 6.8 k resistor produces a voltage drop of

13.6 V

34.4 V

1.36 V

340 V

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Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?

8 V

9.6 V

960 V

96 V

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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?

21.4 mA

2.2 mA

214 mA

2 mA

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What is the voltage source for a circuit carrying 2 A of current through a 36 resistor?

72 V

7.2 V

18 V

1.8 V

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What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

820

8.2

82

8.2 k

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Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance?

5.9 mA

59 mA

590 mA

27.2 mA

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