Question
A wire of resistance 12 ohm per metre is bent to form a complete circle of radius 10 c.m.the resistance between its two diametrically opposite point A and B
Answers
Steve
the circumference is C = 2pi*r. Make sure your answer is in meters, not cm.
Opposite ends of the diameter are half that far apart.
Now just multiply that by 12.
Opposite ends of the diameter are half that far apart.
Now just multiply that by 12.
Deep prabha
R across A-B= R/2=(1/2)pie r rho=1/2(pie*10*0.1*12 = 0.6pie ohms.
Jaitri
Total resistance of wire = 12Ω×2π×10
−1
= 2.4π
Resistance of each half =
2
2.4π
=1.2π
and as about diameter both parts are in parallel
Req. =
2
1.2π
=0.6πΩ
−1
= 2.4π
Resistance of each half =
2
2.4π
=1.2π
and as about diameter both parts are in parallel
Req. =
2
1.2π
=0.6πΩ