Home
Class 10
PHYSICS
A piece of wire of resistance R is cut i...

A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R, then the ratio R/R' is

A

`(1)/(25)`

B

`(1)/(5)`

C

5

D

25

Text Solution

Verified by Experts

The correct Answer is:
D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTRICITY

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS |5 Videos

  • ELECTRICITY

    NAND LAL PUBLICATION|Exercise ACTIVITY 12.6|3 Videos

  • LIGHT : REFLECTION AND REFRACTION

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS |7 Videos

Similar Questions

Explore conceptually related problems

A piece of wire having resistance R is cut into five equal parts. If the five parts of the wire are placed in parallel,how will the resistance of the combination compare with the resistance of original wire?

A wire having a resistance of 1 ohm is cut into three equal parts. The three qual parts are then joined in parallel. What is the value of the resistance of the combination?

Knowledge Check

  • A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R' then, the ratio RR' is :

    A
    `1//25`
    B
    `1//5`
    C
    `VI`
    D
    `25`

  • The equivalent resistance of the parallel combination is:

    A
    smaller than the largest resistance
    B
    larger than the largest resistance
    C
    smaller than the smallest resistance
    D
    larger than the smallest resistance

  • If three resistors R_1, R_2 and R_3 are joined in parallel, then the resistance of the combination equal to

    A
    `R_1 + R_2 + R_3`
    B
    `1/(R_1) + 1/(R_2) + 1/(R_3)`
    C
    `R_1 xx R_2 xx R_3`
    D
    None of the above

    • Similar Questions

    Explore conceptually related problems

    A wire having a resistance of 90 ohm is cut into three equal parts. The three equal parts are then joined in parallel. What is the value of the resistance of the combination ?

    A piece of wire having resistance R is cut into four parts. How does the resistance of each part compare with the original resistance?

    A piece of wire having resistance R is cut into five equal parts. How does the resistance of each part of the wire compare with the original resistance?

    A wire has a resistance of 90 Omega and it is cut into three pieces having equal lengths. If these are now connected in parallel, find the resistance of the combination so formed.

    n cells, each having emf. E and internal resistance r are connected in parallel. What is the net internal resistance of the combination?

    Home
    Profile