orm resistance wire of length 1.00 m and C is a sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted until the voltmeter V reads zero. (ii) The PRT consists of 9.00 m of wire of diameter 8.4 × 10-2 mm. The voltmeter reads 0 V when l1 = 0.422 m. If the standard resistor, R, has a resistance of 220 Ω, what is the resistivity of platinum? Show that you have checked that the value for the resistivity and its unit are sensible.
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.
The circuit shown below can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.00 m and C is a sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted until the voltmeter V reads zero.
(ii) The PRT consists of 9.00 m of wire of diameter 8.4 × 10-2 mm. The voltmeter reads 0 V when l1 = 0.422 m. If the standard resistor, R, has a resistance of 220 Ω, what is the resistivity of platinum? Show that you have checked that the value for the resistivity and its unit are sensible.
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