Q.11. Assertion: Electron move away from a region of lower potential to a region of higher potential.Reason: An electron has a negative charge.Q.12. Assertion : If the distance between parallel plates of a capacitor is halved and dielectric constant is threetimes, then the capacitance becomes 6 times.Reason : Capacity of the capacitor does not depend upon the nature of the material.Q.13. Assertion : In a simple battery circuit, the point of the lowest potential is positive terminal of the battery.Reason : The current flows towards the point of the higher potential, as it does in such a circuit from thenegative to the positive terminal.Q.14. Assertion : Cyclotron is a device which is used to accelerate the positive ion.Reason : Cyclotron frequency depends upon the velocity.Q.15. Assertion : Diamagnetic materials can exhibit magnetism.Reason : Diamagnetic materials have permanent magnetic dipole moment.Q.16. Assertion : Induced emf will always occur whenever there is change in magnetic flux.Reason : Current always induces whenever there is change in magnetic flux

Q.11. Assertion is incorrect while the reason is correct. Electrons move from a region of higher potential to a region of lower potential due to their negative charge.

Q.12. Both assertion and reason are incorrect. The capacitance of a capacitor is directly proportional to the dielectric constant and inversely proportional to the distance between the plates. Therefore, if the distance is halved and the dielectric constant is tripled, the capacitance will increase by a factor of 6. However, the capacitance does depend on the nature of the material between the plates.

Q.13. Both assertion and reason are correct. In a simple battery circuit, the point of lowest potential is indeed the positive terminal of the battery. Current does flow from a point of higher potential to a point of lower potential.

Q.14. The assertion is correct but the reason is incorrect. A cyclotron is used to accelerate positive ions, but the cyclotron frequency does not depend on the velocity of the ions. Instead, it depends on the charge and mass of the ions and the strength of the magnetic field.

Q.15. The assertion is correct but the reason is incorrect. Diamagnetic materials can exhibit magnetism when placed in an external magnetic field, but they do not have a permanent magnetic dipole moment. Instead, they develop an induced magnetic field in the opposite direction to the applied field.

Q.16. Both assertion and reason are correct. An induced emf will occur whenever there is a change in magnetic flux, and this induced emf can cause a current to flow.