A charge +Q is placed at the centre of a circ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The electric potential $V$ at a distance $r$ from a point charge $Q$ is given by $V = \frac{kQ}{r}$.Since the circular path is centered at $Q$,eve

Vedclass · Accepted Answer

Zero

Vedclass · Answer

(B) The electric potential $V$ at a distance $r$ from a point charge $Q$ is given by $V = \frac{kQ}{r}$.Since the circular path is centered at $Q$,every point on the circumference is at the same distance $r$ from the charge $Q$.Therefore,the electric potential at any point on the circular path is constant.Let $V_A$ be the potential at point $A$ and $V_B$ be the potential at point $B$. Since both points are on the circle,$V_A = V_B = \frac{kQ}{r}$.The work done $W$ in moving a charge $q$ from point $A$ to point $B$ is given by $W = q(V_B - V_A)$.Substituting the values,$W = q(\frac{kQ}{r} - \frac{kQ}{r}) = q(0) = 0$.Thus,the work done is zero.

$A$ charge $+Q$ is placed at the centre of a circular path of radius $r$. The work done to bring a charge $+q$ from one end of the diameter to the other end of the circular path in the electric field produced by charge $+Q$ is $.......$

Similar Questions

The diagrams below show regions of equipotentials. $A$ positive charge $q$ is moved from $A$ to $B$ in each diagram.

Two charges $2 \; \mu C$ and $-2 \; \mu C$ are placed at points $A$ and $B$ which are $6 \; cm$ apart.
$(a)$ Identify an equipotential surface of the system.
$(b)$ What is the direction of the electric field at every point on this surface?

The figure shows lines of constant potential in a region where an electric field is present. The electric field at point $B$ is............

What is the direction of the lines of force at any point on the equipotential surface?

The figure shows two equipotential lines in the $XY$ plane for an electric field. The scale is shown. The $X$-component $E_x$ and $Y$-component $E_y$ of the electric field in the space between the equipotential lines are respectively:

Vedclass Test Series

Exam Paper Generator

Online Exam Module