A. effect in charging a capacitor
B. effect in charging a battery
C. effect while passing through an inductance
D. heating effect through a resistance
Related Mcqs:
- A dynamo converts______________?
A. mechanical energy into electrical energy
B. electrical energy into mechanical energy
C. magnetic energy into mechanical energy
D. magnetic energy into electrical energy - A.C cannot be used for_______________?
A. producing heat
B. producing light
C. magnetizing and electroplating
D. all the above - Which of the following works on torque on the current carrying conductor placed in magnetic field ?
A. galvanometer
B. ammeter
C. voltmeter
D. all of the above - The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf - A small coil lies inside a large coil. The two coils are horizontal concentric and carry currents in opposite directions. The large coil will experience______________?
A. A torque about horizontal axis
B. A torque about vertical axis
C. An upward force along the axis
D. No resultant force - Transformer works on the principle of________________?
A. Lenzs law
B. Faradays law
C. Mutual induction
D. Law of conservation of power - Non inductive resistances are used in decreasing______________?
A. Mutual inductance
B. Self inductance
C. Magnetic fields
D. Heating effect - An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?
A. 150msec-1
B. 384msec-1
C. 38.4msec-1
D. 200msec-1 - For electroplating we use_________________?
A. A D.C source
B. an A.C source
C. any source
D. all of the above - Energy stored in a magnetic field is given by______________?
A. LI2
B. L2I/2
C. LI2/2
D. IL2
