If the length of a wire is doubled by taking more of the wire, What happens to its resistance?

Academic Physics NCERT Class 6

Resistance is directly proportional to the length of the wire. Therefore, when the wire length is doubled, its resistance also doubles.

Tutorialspoint

Updated on: 10-Oct-2022

253 Views

A given length of a wire is doubled of itself and this process is repeated once again. By what factor does the resistance of the wire changes?
A 6 ohms resistance wire is doubled up by folding. Calculate the new resistance in wire.\nHow area is get doubled in the solution of this question?
A $6\Omega$ resistance wire is double up by folding. Calculate the new resistance of the wire.
A copper wire has diameter 0.5 mm and resistivity of $1.6\times10^{-8}$â„¦ m. What will be the length of this wire to make its resistance $10\ â„¦$? How much does the resistance change if the diameter is doubled?
(a) State four factors on which the resistance of a conductor depends.(b)A piece of wire of resistance 20Ω is drawn out so that its length increases to twice its original length. Calculate the resistance of the wire in the new situation.
What is meant by the statement that the resistance of a wire is 1 ohm?
Which has less electrical resistance: a thin wire or a thick wire (of the same length and same material)?
Look at figure.The length of wire PQ in case of A is equal to the diameter of the semicircle formed by the wire CDE
What is the area of cross-section of a wire if its length is 2 m, resistance is 46 Ω and resistivity is 1.84 X 10 -6 Ω m?
What is the usual colour of the insulation of (a) live wire(b) neutral wire, and (c) earth wire?
What happens to the potential energy of a body when its height is doubled?
A wire is in the shape of a rectangle. Its length is $40\ cm$ and breadth is $22\ cm$. If the same wire is rebent in the shape of a square, what will be the measure of each side. Also find which shape encloses more area?
Which has more resistance?a) A long piece of nichrome wire or a short one.b) A thick piece of nichrome wire or a thin one.
The diameter of a copper sphere is $18\ cm$. The sphere is melted and is drawn into a long wire of uniform circular cross-section. If the length of the wire is $108\ m$, find its diameter.
a) Write down an expression for the resistance of a metallic wire in terms of resistivity.b) What will be the resistance of the metal wire of length 2m and area of cross-section 1.55 x 10-6 m2, if the resistivity of the metal is 2.88 x 10-8 ohm m?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements