NEET Physics: Questions 265 - 267 of 2099
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Question number: 265
The electric potential and the electric field intensity at the center of a square having four fixed point charges at their vertices as shown in figure are zero.
If electric potential at a point is zero then the magnitude of electric field at that point must be zero.
|a.||Ꭺ is false but Ꭱ is true|
|b.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|
|c.||Ꭺ is true but Ꭱ is false|
|d.||Both Ꭺ and Ꭱ are false|
Question number: 266
Two uniforms discs of equal mass but unequal radii are mounted on fixed horizontal exiles. Light strings are wrapped on each of the discs. The strings are pulled by constant equal forces F for same amount of time as shown in the figure.
Angular momenta of discs are L 1 and L 2 and their kinetic energies are K 1 and K 2. Which of the following statements true
(1) L 1 = L 2
(2) L 1 < L 2
(3) K 1 > K 2
(4) K 1 = K 2
Select the correct answers and mark it according to the following codes:
1, 2 and 3 are correct
2 and 4 are correct
1 and 2 are correct
1 and 3 are correct
Question number: 267
Two charges q 1 and q 2 are placed 30 cm apart, shown in the figure. A third charge q 3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the electrostatic potential energy of the system is . What will be P?
8 q 2
8 q 1
6 q 1