Calculate the electric potential at the ...

Calculate the electric potential at the centre of a metallic ring with charge 0.02 `muC` made from a wire of length 12 cm.

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To calculate the electric potential at the center of a metallic ring with a charge of 0.02 µC and a wire length of 12 cm, we can follow these steps: ### Step 1: Determine the radius of the ring The length of the wire that forms the ring is equal to the circumference of the ring. The circumference \( C \) of a circle is given by the formula: \[ C = 2 \pi r \] where \( r \) is the radius. Given that the length of the wire is 12 cm, we can set up the equation: ...

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The electric potential at the centre of a charged conductor is

zero

twice that of the surface

same as on the surface

none of these

The electric field at the centre of a uniformly charged ring is zero. What is the electric field and potential at the centre of a half ring if the charge on it be Q and its radius be R ?

`(1)/(4 pi epsilon_(0)) (Q)/(pi R^(2)) ,(1)/(4 pi epsilon_(0)) (Q)/(pi R)`

`(1)/(4 pi epsilon_(0)) (Q)/(R^(2)) ,(1)/(4 pi epsilon_(0)) (2Q)/(pi R)`

`(1)/(4 pi epsilon_(0)) (2Q)/(pi R^(2)) ,(1)/(4 pi epsilon_(0)) (Q)/(R)`

`(1)/(4 pi epsilon_(0)) (2Q)/( R^(2)) ,(1)/(4 pi epsilon_(0)) (3Q)/(pi R)`

The magnetic induction at the centre of a coil made from a wire of length 22 cm carrying a current of 0.5 A is

`8 xx 10^(-6) Wb//m^(2)`

`0.9 xx 10^(-6) Wb//m^(2)`

`9 xx 10^(-6) Wb//m`

`0.8 xx 10^(-6) Wb//m^(2)`