Question

When a high resistance voltmeter is connected directly across a resistor, its reading is 2V. An
electric cell is sending the current of 0.4A, in the electric circuit in which a rheostat is also
connected to vary the current.

a) Find the resistance of the resister.

Answer 1

Answer:

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Explanation:

For example, say you have a 200 Ohm, 50 Ohm, and 25 Ohm resistor placed in series. Your total resistance of your circuit is 200 + 50 + 25 = 275 Ohms. If your resistors are placed in parallel, meaning each resistor is connected to the same voltage source, then the equivalent resistance is found by using this formula.