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BITSAT Mock Physics 6: Electrostatics
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Question 1
Two charges, each equal to q, are kept at x = −a and x = a on the x-axis. A particle of mass m and charge is placed at the origin. If charge q0 is given a small displacement (y << a) along the y-axis, the net force acting on the particle is proportional to:
Question 2
Two point charges + 8q and - 2q are located at x = 0 and x = L respectively. The location of a point on the x axis at which the net electric field due to these two point charges is zero is
Question 3
Four charges q1, q2, q3 and q4 are placed at the positions as shown in the figure, given q1 + q2 + q3 + q4 = 0. The electric field on z-axis -
Question 4
A charged oil drop is suspended in uniform field of so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge and )
Question 5
Two identical balls A and B having equal charges are placed at a fixed distance experience a force F. A similar uncharged ball after touching one of them is placed at the middle point between the two balls. The force experienced by this ball is
Question 6
Two metal plates form a parallel plate condenser. The distance between the plates is d. A metal plate of thickness d/2 and of the same area is inserted completely between the plates. The ratio of capacitances in the two cases (later to initial) is -
Question 7
A parallel plate capacitor is completely filled by an insulating material 3 mm thick and of relative permittivity 4. The distance between the plates is increased to allow the insertion of a second sheet 5 mm thick and of relative permittivity ∈r also. If the capacitance of the capacitor so formed is one-half of the original capacitance, then the value of ∈ r -
Question 8
In the circuit shown in figure, the ratio of charges on 5 μF and 4 μF capacitor is –
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Feb 3JEE & BITSAT