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qUESTIONS

MCQs-PYQs-12th-jee

An electron is released from the bottom plate A as shown in the figure (E = 10⁴ N/C). The velocity of the electron when it reaches plate B will be nearly equal toAn electron is released from the bottom plate A as shown in the figure (E = 10⁴ N/C). The velocity of the electron when it reaches plate B will be nearly equal to

MCQs-PYQs-12th-jee

Two charges each equal to ηq ( η⁻¹ less than √ 3 ) are placed at the corners of an equilateral triangle of side a. The electric field at the third corner is E₃ where ( E₀ = q / 4π ε₀ a² )

MCQs-PYQs-12th-jee

The distance between charges 5×10⁻¹¹C and -2.7×10⁻¹¹C is 0.2 m. The distance at which a third charge should be placed in order that it will not experience any force along the line joining the two charges is

MCQs-PYQs-12th-jee

An -particle of mass 6.4×10⁻²⁷ kg and charge 3.2×10⁻¹⁹C is situated in a uniform electric field of 1.6×10⁵ Vm¯¹. The velocity of the particle at the end of -1 2×10² m path when it starts from rest is

MCQs-PYQs-12th-jee

A rod lies along the x-axis with one end at the origin and the other at x→∞. It carries a uniform charge λC/m. The electric field at the point x = -a on the axis will be

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

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