NCERT Class 11 Physics Optional Questions with Answers
41 A positive charge enters in a magnetic field and travels parallel to but opposite the field. If experiences
Answer: an accelerated force.
42 A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system
Answer: decreases by a factor of 2.
44 If the magnetising field on a ferromagnetic material is increased, its permeability.
Answer: is decreased
47 Consider a current carrying wire current I in the shape of a circle. Note that as the current progresses along the wire, the direction of j (current density) changes in an exact manner, while die current/remain unaffected. The agent that is essentially responsible for is
Answer: electric field produced by charges accumulated on the surface of wire.
48 Which of the following is not correct about cyclotron?
Answer: The charged particles and ions in cyclotron can move on any arbitrary path.
49 For equilibrium, the net moment acting on the body by various conservative forces is _____:
50 Essential difference between electrostatic shielding by a conducting shell and magne-tostatic shielding is due to
Answer: lines of B cannot end. on any material and perfect shielding is not possible.