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QNEET-2013-Ph-1577: NEET 2013 Physics - Class 12 NEET-2013-Ph-1577 Solution: A 12 cm wire is given a shape of a right angled triangle ABC…
A 12 cm wire is given a shape of a right angled triangle ABC having sides 3 cm 4 cm and 5 cm as shown in the figure. The resistance between two ends (AB BC CA) of the respective sides are measured one by one ratio 9:16:25 27:32:35 21:24:25 3:4:5
Multiple Choice Options
- A 9:16:25
- B 27:32:35
- C 21:24:25
- D 3:04:05
Step-by-Step Verified Solution
Resistance is directly proportional to length
1 R A B = 1 3 + 1 4 + 5 = ( 4 + 5 ) + 3 ( 3 ) ( 4 + 5 )
R A B = 3 _ ( 4 + 5 ) 3 + ( 4 + 5 ) = 27 12
Similarly,
R B C = 4 _ ( 3 + 5 ) 4 + ( 3 + 5 ) = 32 12
R A C = 5 _ ( 3 + 4 ) 5 + ( 3 + 4 ) = 35 12
_ R AB : R BC : R AC = 27 : 32 : 35