Home
Class 12
PHYSICS
Two point charges +Q(1) and +Q(2) are pl...

Two point charges `+Q_(1) and +Q_(2)` are placed on opposite sides of a circular disc as shown in the figure. Find the flux linked with the ring.

Text Solution

Verified by Experts

Here `tantheta_(1)=(R)/(R//sqrt(3))=sqrt(3),theta_(1)=60^(@)`
`tantheta_(2)=(R)/(sqrt(3)R)=(1)/(sqrt(3)),theta_(2)=30^(@)`
The field lines from both point charges cross from opposites direction. Hence the difference of the flux would have to be taken.
`phi=(Q_(1))/(2in_(0))(1-costheta_(1))-(Q_(2))/(2in_(0))(1-costheta_(2))`
`=(Q_(1))/(2in_(0))(1-(1)/(2))-(Q_(2))/(2in_(0))(1-(sqrt(3))/(2))`
Many a times, we see questions in which position dependent field is given which is uniform in direction and then flux for a surface is to be calculated.
Promotional Banner

Similar Questions

Explore conceptually related problems

Three point electric charges q_1 = 6µC, q_2 = 4µC and q_3 = -8µC are placed on the circumference of a circle of radius 1m as shown in the figure. What is the value of the charge q, placed on the circle if the potential at the centre of the circle is zero?

Consider the charges q,q, and -q placed at the vertices of an equilateral triangle as shown in the figure. What is the force on each charge? '(##VPU_HSS_PHY_XII_CO1_E01_007_Q01##)'

Two point charges Q and -3Q are placed at some distance apart. If the electric field at the location of Q is E, then field at the location of -3Q is

Two point charges q_(1) = 2 mu C and q_(2) = 1 mu C are placed at distances b = 1 cm and a = 2 cm from the origin on the Y and X axes as shown. The electric field vector at point P(a, b) will subtend an angle theta with X axis is given by

Two point charges +q and -q are placed at distanced d apart. What are the points at which the resultant field is parallel to the line joininin the two charges?