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A wire of resistance 10 ohms is drawn out to three times its
original length. The new resistance will be

(1) 90 ohm

(2) 10 ohm

(3) 30 ohm

(4) 120 ohm

Question Posted / ali

Answers were Sorted based on User's Feedback



A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / ali

( 1 ) 90 ohm

Is This Answer Correct ?    15 Yes 5 No

A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / harsh dubey

R=RHO*L/A
MULTIPLY AND DIVIDE BY L
R=RHO*L*L/A*L
AS RHO AND VOLUME(A*L)IS CONSTT.
SO
WE HAVE,
R2/R1=square of (L2/L1)
as increased by 3 times,putting L1=3L2
WE HAVE,
R2=9R1
OR
R2=square of (n)*r........
so correct answer is=90ohm

Is This Answer Correct ?    8 Yes 2 No

A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / umesh

(1)

Is This Answer Correct ?    5 Yes 3 No

A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / shwta

the previous ans is ryt...

Is This Answer Correct ?    0 Yes 1 No

A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / shwta

thnx a lot, mr harsh dubey! ur answer helped me a lot..
thanx again!! *gratitude*

Is This Answer Correct ?    0 Yes 1 No

A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance wi..

Answer / p dilip kumar

As R= (SYMBOL ROW * L)/A
which means R is directly propotional to length
so when length of the wire is drawn three times obviously
the resistance will be multiple of 3.

Solution: 30 ohms

Is This Answer Correct ?    2 Yes 9 No

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