Curioustab

Home » Electrical Engineering » Ohm's Law

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

8.2 kΩ
820 Ω
8.2 Ω
82 Ω

Correct Answer: 82 Ω

Next Question→

More Questions from Ohm's Law

When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is
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.
What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?
The formula to find I when the values of V and R are known is
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?
If 750 µA is flowing through 11 kΩ of resistance, what is the voltage drop across the resistor?
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
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
When 12 V are applied across a 68 Ω resistor, the current is

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion