Railways Exam  >  Railways Questions  >  Two wires have their lengths, diameters and r... Start Learning for Free
Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire is
  • a)
    5 ohms
  • b)
    10 ohms
  • c)
    20 ohms
  • d)
    40 ohms
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two wires have their lengths, diameters and resistivities, all in the ...
Resistance is directly proportional to the length of the wire, its resistivity and inversely proportional to the cross-sectional area.
WIRE I
Let the length = L
Resistivity = R
Diameter = D
∴ Total Resistance ∝ L x R/ D2  
WIRE II
Length = 2L
Resistivity = 2R
Diameter = 2D
∴ Total Resistance = 2L x 2R / 2D x 2D = LR/D2  
∴ WIRE I : WIRE II = LR/D2 : LR/D2 = 1 : 1
i.e. Resistance of WIRE ZB is also 10Ω
View all questions of this test
Explore Courses for Railways exam
Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer?
Question Description
Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Railways. Download more important topics, notes, lectures and mock test series for Railways Exam by signing up for free.
Here you can find the meaning of Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Two wires have their lengths, diameters and resistivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resistance of the thicker wire isa)5 ohmsb)10 ohmsc)20 ohmsd)40 ohmsCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Railways tests.
Explore Courses for Railways exam

Top Courses for Railways

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev