Home
Class 12
PHYSICS
A Copper (Cu) rod of length 25 cm and cr...

A Copper (Cu) rod of length 25 cm and cross sectional area `3 mm^(2)` is joined with a similar Aluminium (Al) rod as shown in figure. Find the resistance of the combination between the ends A and B.
(Take Resistivity of Copper `= 1.7 xx 10^(–8)Omegam` Resistivity of Aluminium `= 2.6 xx 10^(-8)Omegam` )

A

`2.170 mOmega`

B

`1.420 mOmega`

C

`0.0858mOmega`

D

`0.858mOmega`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • JEE MAINS 2021

    JEE MAINS PREVIOUS YEAR|Exercise PHYSICS (SECTION-B)|40 Videos

  • JEE MAINS 2021

    JEE MAINS PREVIOUS YEAR|Exercise PHYSICS (SECTION - A) |40 Videos

  • JEE MAINS 2020

    JEE MAINS PREVIOUS YEAR|Exercise PHYSICS|246 Videos

  • JEE MAINS 2022

    JEE MAINS PREVIOUS YEAR|Exercise PHYSICS (SECTION -B)|10 Videos

Similar Questions

Explore conceptually related problems

A copper rod of length 20 cm and cross-sectional area 2 mm^(2) is joined with a similar aluminium rod as shown in Fig. 4.6. Find the resistance of the combination between the ends. Resistivity of copper =1.7xx10^(-8) Omega m and resistivity of aluminium =2.6xx10^(-8) Omega m.

A copper rod of length 20cm and cross-sectional area 2mm^(2) is joined with a similar aluminium rod as shown in figure .Find the resistance of the combination between the ends, Resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium =2.6xx10^(-8)(Omega)m .

Two rods of copper and aluminium of each of equal length 20 cm and equal cross-sectional area 2 mm^(2) . They are joined (i) in series and (ii) in parallel as shown in figure. Find the resistance of the combination in each case. Resistivity of copper =1.7 xx10^(-8) Omega m and resistivity of aluminium = 2.6 xx 10^(-8)Omega m .

Calculate the resistance of 1 km long copper wire of radius 1 mm . Resistivity of copper is 1.72 xx 10^-8 Omega m .

Calculate the resistance of an aluminium wire of length 50 cmand cross sectional area 2.0mm^(2) . The resistivity of aluminium is (rho)=2.6xx10^(-8)(Omega)m.

Find the resistance of a copper coil of total wire-length 10m and area of cross section 1.0mm^(2). What would be the resistance of a similar coil of aluminium? The resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium 2.6xx10^(-8)(Omega).

A copper conductor of length 10cm and radius 1*5mm is connected in parallel to an ammeter having a resistance of 0*03Omega . Find the current in the circuit if the ammeter indicates 0*4A . The resistivity of copper is 1*78xx10^-8Omegam .

A metel rod of the length 10cm and a rectangular cross-section of 1 cm xx 1//2 cm is connected to a battery across opposite faces. The resistance will be

The length (16 cm) and area of cross section (4 cm^(2)) of a copper wire are increased by 25% each. If the resistance of original wire is 8 Omega , find the new resistance.