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WorksheetsElectromagnetic Induction
Total questions: 21
Worksheet time: 16mins
The total number of magnetic field lines passing through an area is termed as?
Voltage
EMF
Magnetic flux
Magnetic flux density
Magnetic flux involves __________ and _________.
magnetic field and surface area
induction and surface area
magnetic field and induction
electromagnetic induction and surface area
______ Law says that the Induced current is proportional to the change of magnetic flux
Lenz's
Faraday's
Ampere's
Faraday's law states that𝜺=−𝑵 𝒅𝝓/𝒅𝒕 , what is the physical meaning of the equation?
The magnetic field direction is propotional to the current of loop
The induced emf is proportional to the rate change of magnetic flux
The current of circuit proportional to voltage applied in the circuit
The induced emf is not equal to change of magnetic field
"An induced current always flow in a direction that opposes the change in magnetic flux that causes it". this is the statement for?
Fleming’s left hand rule
Fleming’s right hand rule
Faraday’s law
Lenz’s law
How can the magnetic flux through a coil of wire be increased? Select two answers:
Increase the magnitude of the magnetic field that passes outside the loop
Increase the magnitude of the magnetic field that passes through the loop.
Increase the cross sectional area of the loop.
Orient the loop so its normal vector is perpendicular to the external magnetic field direction.
Changing current in a coil produces emf in the same coil. this phenomenon is known as
Mutual induction
Self induction
induced emf
induced current
Self induced emf is always proportional to the time rate of change of the current.
True
False
SI unit for self inductance, L is
Tesla(T)
Weber(Wb)
Henry(H)
Farad (F)
When a constant current of 5.0 A flows in a 400 turns solenoid of length, l and cross sectional area A, emf is induced in the coil.
True
False
Which of the following factors DOES NOT affect the self inductance of a coil?
The length of the coil
The current flows in the coil
The number of turn of the coil
The cross sectional area of the coil
Where is the energy being stored in an inductor carrying a steady current ?
In the electric field of the coil
In the circuit
In the power supply
In the magnetic field of the coil
The phenomenon due to which there is an induced current in one coil due to the current in a neighboring coil is?
Mutual induction
Steady current
Electromagnetism
Self induction
When a conductor is moved to cut through the magnetic flux, an _______________ is produced.
induced current
electromotive force
electromagnetic induction
internal resistance
Which coil will have the largest flux?
A
B
C
D
A ring is originally oriented 30-deg from the magnetic field. Which of the following would increase the flux?
increasing the field
reversing the direction of the field
increasing 30-deg to 90-deg
decreasing 30-deg to 0-deg
If the magnetic field were increased from B = 0.5 mT to 1.0mT, the induced current in the loop would be directed _______
clockwise
counterclockwise
into the page
out of the page
The direction of induced current is determine by using
Fleming's Left Hand Rule
Right Hand Rule
Right Hand Grip Rule
