The figure below shows a Wheatstone bridge, a circuit used to precisely measure an unknown resistance R by varying Ruar until the ammeter reads zero current and the bridge is said be "balanced." 3.00 N 1.00 N 9.00 V Ryar R If the bridge is balanced with Rar = 16.2 W, find the value of the unknown resistance R and the current in the 1.00 Q resistor. (Hint: With the bridge balanced, the wire through the ammeter can effectively be removed from the circuit, leaving two pairs of resistors in parallel.)

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.