When 12 V are applied across a 68 resistor, the current is

Answer: Option C

Explanation:

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

Answer: Option A

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.

Answer: Option D

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?

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

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