Direction of Induced EMF mcq
When a conductor moves in a magnetic field, the induced EMF is always directed:
a) Along the direction of motion
b) Opposite to the direction of motion
c) Parallel to the magnetic field
d) Perpendicular to the magnetic field
Answer: d) Perpendicular to the magnetic field
According to Lenz’s law, the direction of the induced EMF opposes the:
a) Initial magnetic field
b) Final magnetic field
c) Motion of the conductor
d) Direction of the current
Answer: c) Motion of the conductor
When a magnet is moved towards a closed loop of wire, the induced EMF in the wire creates a current that flows:
a) Clockwise in the loop
b) Counterclockwise in the loop
c) In the direction of magnet movement
d) Opposite to the direction of magnet movement
Answer: b) Counterclockwise in the loop
When a magnet is moved away from a closed loop of wire, the induced EMF in the wire creates a current that flows:
a) Clockwise in the loop
b) Counterclockwise in the loop
c) In the direction of magnet movement
d) Opposite to the direction of magnet movement
Answer: a) Clockwise in the loop
If a conductor is moved parallel to the magnetic field lines, the induced EMF in the conductor will be:
a) Maximum
b) Minimum
c) Zero
d) Negative
Answer: c) Zero
If a conductor moves at an angle to the magnetic field lines, the induced EMF in the conductor will be:
a) Maximum
b) Minimum
c) Zero
d) Negative
Answer: a) Maximum
The direction of the induced EMF in a coil is determined by:
a) Right-hand rule
b) Left-hand rule
c) Faraday’s law
d) Ohm’s law
Answer: b) Left-hand rule
When a loop of wire is rotated in a uniform magnetic field, the induced EMF is maximum when the loop is:
a) Parallel to the magnetic field
b) Perpendicular to the magnetic field
c) At an angle of 45 degrees to the magnetic field
d) Not influenced by the magnetic field
Answer: b) Perpendicular to the magnetic field
The direction of the induced EMF in a transformer primary coil is determined by the:
a) Number of turns in the primary coil
b) Number of turns in the secondary coil
c) Direction of current in the secondary coil
d) Rate of change of magnetic flux
Answer: d) Rate of change of magnetic flux
According to Faraday’s law, the magnitude of the induced EMF is directly proportional to the:
a) Resistance of the circuit
b) Current in the circuit
c) Magnetic field strength
d) Rate of change of magnetic flux
Answer: d) Rate of change of magnetic flux
Direction of Induced EMF mcq diagram
When a conducting loop is placed in a changing magnetic field, the induced EMF in the loop will be:
a) Constant
b) Increasing
c) Decreasing
d) Zero
Answer: d) Zero
The induced EMF in a coil is zero when the magnetic field passing through the coil is:
a) Increasing
b) Decreasing
c) Uniform
d) Nonexistent
Answer: c) Uniform
The direction of the induced EMF in a generator is determined by the:
a) Armature resistance
b) Magnetic field strength
c) Rate of rotation of the armature
d) Load connected to the generator
Answer: c) Rate of rotation of the armature
The direction of the induced EMF in a generator changes every:
a) Second
b) Minute
c) Rotation
d) Cycle
Answer: c) Rotation
When a magnet is moved inside a coil, the induced EMF can be increased by:
a) Increasing the resistance of the coil
b) Decreasing the number of turns in the coil
c) Increasing the speed of magnet movement
d) Decreasing the strength of the magnet
Answer: c) Increasing the speed of magnet movement
When a current-carrying wire is placed in a magnetic field, the wire experiences a force in a direction:
a) Parallel to the magnetic field
b) Opposite to the magnetic field
c) Perpendicular to the magnetic field
d) Tangential to the magnetic field
Answer: c) Perpendicular to the magnetic field
The induced EMF in a coil can be increased by:
a) Decreasing the number of turns in the coil
b) Decreasing the magnetic field strength
c) Increasing the area of the coil
d) Decreasing the rate of change of magnetic flux
Answer: c) Increasing the area of the coil
When a current-carrying conductor is placed in a magnetic field, the induced EMF is caused by:
a) The motion of the conductor
b) The presence of a magnetic field
c) The flow of current in the conductor
d) The resistance of the conductor
Answer: a) The motion of the conductor
When a magnetic field is applied to a loop of wire, the induced EMF can be increased by :
a) Increasing the temperature of the wire
b) Decreasing the number of turns in the loop
c) Increasing the magnetic field strength
d) Decreasing the area of the loop
Answer: c) Increasing the magnetic field strength
The direction of the induced EMF in a solenoid can be reversed by:
a) Increasing the number of turns in the solenoid
b) Decreasing the current in the solenoid
c) Reversing the direction of the magnetic field
d) Decreasing the diameter of the solenoid
Answer: c) Reversing the direction of the magnetic field
When a loop of wire is moved parallel to a magnetic field, the induced EMF is:
a) Maximum
b) Minimum
c) Zero
d) Negative
Answer: c) Zero
The direction of the induced EMF in a transformer secondary coil is determined by the:
a) Number of turns in the primary coil
b) Number of turns in the secondary coil
c) Direction of current in the primary coil
d) Rate of change of magnetic flux
Answer: c) Direction of current in the primary coil
The direction of the induced EMF in a coil is opposite to the change in:
a) Magnetic field strength
b) Current direction
c) Temperature
d) Magnetic flux
Answer: d) Magnetic flux
The induced EMF in a conductor is zero when the conductor is:
a) Stationary in a magnetic field
b) Experiencing a constant magnetic field
c) Not connected to a circuit
d) Made of a non-conductive material
Answer: a) Stationary in a magnetic field
The direction of the induced EMF in a coil is reversed when:
a) The coil is moved away from a magnetic field
b) The coil is rotated in a magnetic field
c) The magnetic field strength is increased
d) The coil is heated
Answer: b) The coil is rotated in a magnetic field