Advertisements
Advertisements
प्रश्न
The intensity of the electric field at a point at a perpendicular distance ‘r’ from an infinite line charge, having linear charge density ‘λ’ is given by:
विकल्प
E = `(1/(4π∈_0))λ/r`
E = `(1/(4π∈_0)) (2λ)/r`
E = `(1/(4π∈_0)) λ/r^2`
E = `(1/(4π∈_0)) (2λ)/r^2`
उत्तर
E = `(1/(4π∈_0)) (2λ)/r`
The intensity of the electric field at a point at a perpendicular distance ‘r’ from an infinite line charge, having linear charge density ‘λ’ is given by: E = `(1/(4π∈_0)) (2λ)/r`
APPEARS IN
संबंधित प्रश्न
A charge is distributed uniformly over a ring of radius 'a'. Obtain an expression for the electric intensity E at a point on the axis of the ring. Hence, show that for points at large distance from the ring, it behaves like a point charge.
Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason?
The bob of a simple pendulum has a mass of 40 g and a positive charge of 4.0 × 10−6 C. It makes 20 oscillations in 45 s. A vertical electric field pointing upward and of magnitude 2.5 × 104 NC−1 is switched on. How much time will it now take to complete 20 oscillations?
A charged oil drop weighing 1.6 x 10-15 N is found to remain suspended in a uniform electric field of intensity 2 x 103 Nc-1. Find the charge on the drop.
A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed ______.
A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in the figure. The ratio of charges Q and q is ______.
Two equal point charges of the same sign are fixed on the y-axis, on either side of the origin equidistant from it, with the distance between them d. A third charge moves along the x-axis. The distance of the third charge from either of the two fixed charges when force on the third charge is maximum will be ______ cm.
[d = 10 cm]
Consider two identical point charges located at points (0, 0) and (a, 0).
Is there a point on the line joining them at which the electric field is zero?
Consider two identical point charges located at points (0, 0) and (a, 0).
Is there a point on the line joining them at which the electric potential is zero?
An isolated point charge particle produces an electric field `vecE` at a point 3 m away from it. The distance of the point at which the field is `vecE/4` will be ______.