Electrostatics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 71 - 74 of 368
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Question 71
Question MCQ▾
A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles, then
Choices
Choice (4) | Response | |
---|---|---|
a. | The capacitance increases | |
b. | The charge on the capacitor increases | |
c. | The voltage across the plates decreases | |
d. | The electrostatic energy stored in the capacitor increases |
Question 72
Question MCQ▾
An electric dipole has the magnitude of its charge is q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is perpendicular to the direction of the field, the force on it and its potential energy are respectively
Choices
Choice (4) | Response | |
---|---|---|
a. | q. E and | |
b. | q. E and | |
c. | are zero | |
d. | 2q. E and minimum |
Question 73
Question MCQ▾
If identical charges (-q) are placed at each corner of a cube of side b , then electric potential energy of charge (+ q) which is placed at center of the cube will be
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 74
Question MCQ▾
Figure given below shows two identical parallel plate capacitors connected to a battery with switch S closed. The switch is now opened and the free space between the plates of capacitors is filled with a dielectric of dielectric constant 3. What will be the ratio of total electrostatic energy stored in both capacitors before and after the introduction of the dielectric?
Choices
Choice (4) | Response | |
---|---|---|
a. | 3: 5 | |
b. | 3: 1 | |
c. | 5: 3 | |
d. | 5: 1 |