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qUESTIONS

MCQs-PYQs-12th-jee

If an insulated non-conducting sphere of radius R has charge density p. The electric field at a distance r from the centre of sphere (r greater than R) will be

MCQs-PYQs-12th-jee

An electron moving with the speed 5×10⁶m per sec is shouted parallel to the electric field of intensity 1×10³ N/C . Field is responsible for the retardation of motion of electron. Now evaluate the distance travelled by the electron before coming to rest for an instant (mass of e = 9×10⁻³1Kg. charge = 1.6×10⁻¹⁹C)

MCQs-PYQs-12th-jee

A positively charged particle moving along x-axis with a certain velocity enters a uniform electric field directed along positive y-axis. Its

MCQs-PYQs-12th-jee

Two infinite parallel metal planes, contain electric charges with charge densities +σ and -σ respectively and they are separated by a small distance in air. If the permittivity of air is 80 then the magnitude of the field between the two planes with its direction will be

MCQs-PYQs-12th-jee

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

MCQs-PYQs-12th-jee

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

MCQs-PYQs-12th-jee

Two charges +5µC and +10µC are placed 20 cm apart. The net electric field at the mid-point between the two charges is

MCQs-PYQs-12th-jee

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

MCQs-PYQs-12th-jee

Two-point charges of 20µC and 80µC are 10cm apart. Where will the electric field strength be zero on the line joining the charges from 20µC charge

MCQs-PYQs-12th-jee

The distance between a proton and electron both having a charge 1.6×10⁻¹⁹ coulomb, of a hydrogen atom is 10⁻¹⁰ metre. The value of intensity of electric field produced on electron due to proton will be

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