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qUESTIONS

MCQs-PYQs-12th-jee

Two points charges +10⁻⁷C and -10⁻⁷C are placed at A and B, 20 cm apart as shown in the figure. Calculate the electric field at C, 20 cm apart from both A and B

MCQs-PYQs-12th-jee

An electron initially at rest falls a distance of 1.5cm in a uniform electric field of magnitude 2×10⁴N/C. The time taken by the electron to fall this distance is

MCQs-PYQs-12th-jee

Under the action of a given coulombic force the acceleration of an electron is 2.5×10²² m/s². Then the magnitude of the acceleration of a proton under the action of same force is nearly

MCQs-PYQs-12th-jee

The figure below shows the electric field lines due to two positive charges. The magnitudes EA, EB and Ec of the electric fields at points A, B and C respectively are related as

MCQs-PYQs-12th-jee

The wrong statement about electric lines of force is

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

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