Electrostatics ...

Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse?

There is a solid sphere of radius ‘R\' having uniformly distributed charge. What is the relation between electric field \'E\' (inside the sphere) and radius of sphere‘R\' is

Which of the following is deflected by electric field?

Charges 4Q, q andA placed along x-axis at positionsx = 0, x =1/2 and x = 1, respectively. Find the value of qso that force on charge Q is zero

A charged particle of mass 5 × 10^–5 kg is held stationary in space by placing it in an electric field of strength 10⁷NC^–1 directed vertically downwards. The charge on the particle is

Two electric charges 12 µC and –6 µC are placed 20 cm apart in air. There will be a point P on the line joining these charges and outside the region between them, at which the electric potential is zero. The distance of P from –6 µC charge is

In the given figure distance of the point from A wherethe electric field is zero is

Figures below show regular hexagons, with charges at the vertices. In which of the following cases the electric field at the centre is not zero?

An electron enters in an electric field with its velocity in the direction of the electric lines of force. Then

An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. The final speed of the electron will be