26. The value of magnetic force on the moving charge can be found experimentally and it is given by, F = ________.
27. Magnetic force on the charge is the product of three quantities charge, speed and _______________.
28. When charge moves parallel to the magnetic field the value of qbecomes ________.
29. The direction of magnetic force is always perpendicular to the direction of both __________ and magnetic field.
30. According to right hand rule “If the fore-finger points towards the direction of _________________, middle finger points to the direction of field (B), then thumb gives direction of force.
31. _________ is charges in motion.
32. To understand the working of an ___________ we need to understand the behaviour of a current carrying coil kept in a uniform magnetic field.
33. Apply right hand rule to get the direction of ___________.
34. In electric motors, electrical energy is converted into _____________ energy.
35. When a bar magnet is pushed towards a coil with its north pole facing the coil an ____________ is set up in the coil.
36. Whenever there is a continuous change of magnetic flux linked with a closed coil, a _________ is generated in the coil.
37. The current generated is called _________ current and is set up by an induced electromotive force.
38. The phenomenon of getting induced current is called __________________.
39. Faraday observed that the changes in the magnetic flux through the coil are responsible for the generation of __________ in the coil.
40. Faraday observed that the rapid changes in flux through coil generate greater induced current or ___________ .
41. The induced EMF generated in a closed loop is equal to the rate of change of _____________ passing through it.
42. Induced EMF = change in flux/ _______ (ε = ΔΦ/Δt).
43. _______ law states that “the induced current will appear in such a direction that it opposes the changes in the flux in the coil.”
44. The tape recorder which we use to listen to songs (or) record voices works on the principle of ________________.
45. The tape recorder tape consists of a piece of plastic tape coated with _________.
46. The principle of electromagnetic induction in the case of using ________.
47. An induction stove works on the principle of ________________.
48. In an AC motor __________ is not necessary.
49. In a DC motor commutator is necessary to reversing the ________.
50. In generators, mechanical energy is converted into the __________.
51. _________________ is defined as the ratio of flux passing through a plane perpendicular to field and the area of the plane.
52. In electric motor, electrical energy is converted into ________________.
53. ____________: The induced EMF generated in a closed loop is equal to the rate of change of magnetic flux passing through it.
54. ____________: the induced current set up in the coil is in such a direction that it opposes the changes in the flux.
55. When a conductor of length ‘l’ moves perpendicular to field B with a speed v then potentialdifference (voltage) developed between the ends of conductor is Blv. This EMF is called ___________.
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