Which apparatus are required to find the specific resistance of A given wire?

Finding the resistance of a given wire using meter bridge and hence determine resistivity of its material. Aim – To find the resistance of a given wire using meter bridge and hence determine resistivity of its material .

How do you find the resistance of A wire?

Once you have plugged in the numbers, simply take voltage divided by current to solve for the resistance of the wire. For example: R = V/I = 100/10 = 10 ohms. The resistance of the wire is 10 ohms.

How will you determine the resistance of A material using meter bridge?

This experiment is based on the principle of wheatstone bridge having the null deflection value. The formula for finding the unknown resistance is X = 100-l / l * R.

How do you find the resistance per unit length of A wire?

FORMULA:-1) resistance of the wire,R=1/m Where R=resistance of the wire,m=slope of the graph of current versus potential difference. 2)resistance per unit length=R/LWhere L=the length of the experimental wire.

How do you find the specific resistance?

Specific Resistance (”ρ”) is a property of any conductive material, a figure used to determine the end-to-end resistance of a conductor given length and area in this formula: R = ρl/A. Specific resistance for materials are given in units of Ω-cmil/ft or Ω-meters (metric).

How will you find the resistivity of the given resistance wire in Ohm’s law experiment?

Resistance= Resistivity * Length of wire/ Squared area of cross section of the wire.

How do you find the resistance of a copper wire?

Engineers often ask how to calculate the resistance of a cable, there is a very simple formula that works well within an ohm or so with copper cable. 19 ÷ by 2.5mm² will give you 7.6 ohms per km. ÷ by 1000 for resistance per meter. 19 ÷ by 4mm² will give you 4.75 ohms per km.

What is Metre bridge determine the unknown resistance by Metre bridge?

The Meter bridge is the modification of Wheatstone’s network used to determine the value of unknown resistance. The meter bridge consists of a thin, uniform, and homogenous conducting wire AC, rectangular wooden board between two thick L shaped metal strips C1 and C2 as shown in the diagram.

How do you find the unknown resistance using the meter bridge?

If the length AB is l, then the length BC is ( 100−l ). The specific resistance or resistivity of the material of the wire can be then calculated by using the relation, ρ=Lπr2X ; Where L be the length of the wire and r be its radius.

What is the resistance per unit length?

Resistance per unit length is “the ratio of specific resistance or resistivity to the area of cross- section of a given conducting material”.

How do you find the resistance of a wire using a meter bridge?

Connect resistance box of low range in the left hand gap between A and B. Make all the other connections as shown in the circuit diagram. Take out some resistance (say 2 ohm) from the resistance box, plug the key K. Touch the jockey gently first at left end and then at right end of the bridge wire.