Electrical Engineering - Ohm's Law
Exercise : Ohm's Law - General Questions
- Ohm's Law - General Questions
- Ohm's Law - True or False
21.
When 12 V are applied across a 68 
resistor, the current is
resistor, the current is22.
Approximately how much current flows through a 3.3 M resistor across a 30 V source?
resistor across a 30 V source?9 
A
A90 A
A900 A
A9000 A
A23.
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
4
2
20
24.
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?
183
18.3
66
6.6
25.
What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?
8.2 k
820
8.2
82
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