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A search coil having 2000 turns with area 1.5 cm2 is placed in a magnetic field of 0.60 T. The coil is moved rapidly out of the field in a time of 0.2 s. Calculate the induced emf in the search coil.
Concept: Induced Emf in a Stationary Coil in a Changing Magnetic Field
An aircraft of wing span of 50 m flies horizontally in the Earth's magnetic field of 6 x 10-5 T at a speed of 400 m/s. Calculate the emf generated between the tips of the wings of the aircraft.
Concept: Motional Electromotive Force (e.m.f.)
A circular coil of 100 turns with a cross-sectional area of 1 m2 is kept with its plane perpendicular to the magnetic field of 1 T. The magnetic flux linkage is ______.
Concept: Transformers
In which of the following devices, the eddy current is not used ______
Concept: Eddy Currents or Foucault Currents
The role of inductance is equivalent to ______
Concept: Induction and Energy Transfer
In the expression e = –dΦ/dt, the -ve sign signifies ______
Concept: Induced Emf in a Stationary Coil in a Changing Magnetic Field
Distinguish between Step up and Step Down Transformer.
Concept: Transformers
A plane of a coil of 10 turns is tightly wound around a solenoid of diameter 2 cm having 400 turns per centimeter. The relative permeability of the core is 800. Calculate the inductance of the solenoid.
Concept: Induction and Energy Transfer
Obtain an expression for the self-inductance of a solenoid.
Concept: Inductance >> Self Inductance
Find an expression for the power expended in pulling a conducting loop out of a magnetic field.
Concept: Energy Stored in a Magnetic Field
Two inductor coils with inductance 10 mH and 20 mH are connected in series. What is the resultant inductance of the combination of the two coils?
Concept: Energy Stored in a Magnetic Field
An emf of 91 mV is induced in the windings of a coil when the current in o nearby coil is increasing at the rate of 1.3 A/s. what is the mutual inductance (M) of the two coils in mH?
Concept: Inductance >> Mutual Inductance
Derive an expression for energy stored in the magnetic field in terms of induced current.
Concept: Energy Stored in a Magnetic Field
A wire 5 m long is supported horizontally at a height of 15 m along an east-west direction. When it is about to hit the ground, calculate the average e.m.f. induced in it. (g = 10 m/s2)
Concept: Motional Electromotive Force (e.m.f.)
Derive the equation for a transformer.
Concept: Transformers
An aircraft of wing span of 60 m flies horizontally in earth’s magnetic field of 6 × 10−5 T at a speed of 500 m/s. Calculate the e.m.f. induced between the tips of the wings of the aircraft.
Concept: Motional Electromotive Force (e.m.f.)
The current in a coil changes from 50A to 10A in 0.1 second. The self inductance of the coil is 20H. The induced e.m.f. in the coil is ______.
Concept: Inductance >> Self Inductance
Discuss the composition of two S.H.M.s along the same path having same period. Find the resultant amplitude and intial phase.
Concept: LC Oscillations
