|
1) The phenomenon of induction of induced current in one coil due to change of current in a neighboring coil is called a. flow of power in fuse b. mutual induction c. speed of relative motion of coil d. speed of relative motion of magnet
|
||||
|
2) If we increase the number of loops, the turning effect would a. increase b. decrease c. remain same d. become zero
|
||||
|
3) A coil of wire consisting of many loops is known as a. magnet b. solenoid c. photon d. pole
|
||||
|
4) As per Michael Faraday, if the forefinger points the direction of the magnetic field, the middle finger in the direction of the current, then the thumb would indicate the direction of a. force acting on the conductor b. magnetic field c. electric field d. none of above
|
||||
|
5) If the current in one coil becomes steady then magnetic field lines become a. zero b. constant c. less than before d. more than before
|
||||
|
6) At the generating station, the AC voltage is a. stepped down b. remains constant c. stepped up d. none of above
|
||||
|
7) The type of temporary magnet, which is created when current flows through a coil is called an a. electromagnet b. mechanical energy c. magnetism d. potential difference
|
||||
|
8) An ideal transformer dissipates by itself a. low power b. high power c. no power d. none of above
|
||||
|
9) If we grip the coil with our right hand by curling our fingers in the direction of the conventional current, our thumb will indicate the coil's a. west pole b. south pole c. east pole d. north pole
|
||||
|
10) The power is transmitted over long distances at high voltage to minimize the a. loss of energy b. loss of air c. loss of light d. cost
|
||||
|
11) Through a conductor, an electric current produces a a. mechanical energy b. magnetism c. potential difference d. magnetic field
|
||||
|
12) The direction of induced Electromotive force (EMF) in a circuit is under the law of conservation of a. mass b. charge c. energy d. momentum
|
||||
|
13) The direction of induced current in a circuit is always such that it opposes the cause that produces it. This law was introduced by a. Faraday b. Lenz c. Fleming d. Johns Burge
|
||||
|
14) By reducing the current through the cable, power loss in the form of heat dissipation can be a. increased b. reduced c. constant d. none of above
|
||||
|
15) A practical application of mutual induction is called a. generator b. fuse c. circuit breaker d. transformer
|
||||
|
16) Transformers are used to a. increase AC only b. decrease AC only c. constant AC d. increase and decrease AC
|
||||
|
17) As per Michael Faraday, the force is increased if the a. current in the wire is increased b. magnetic field's strength increased c. length of wire increased d. all of above
|
||||
|
18) When a current passes through a conductor, it produces a. electric field b. magnetic field c. electromagnetic field d. mechanical field
|
||||
|
19) Transformers are the application of a. induction b. mutual induction c. electrostatics d. mutual charges
|
||||
|
20) The magnitude of induced Electromotive force (EMF) depends on a. speed of motion of coil and magnet only b. number of turns of coil only c. current passing through coil d. speed of motion of coil , magnet and number of turns of coil
|
||||
|
21) The direction of the magnetic field inside the bar magnet is from a. north pole to south pole b. south pole to north pole c. side to side d. all of above
|
||||
