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10The motor effect produces motion in a wire when current flows in a magnetic field.
The direction of the wire does not change when the battery polarity is reversed.
The magnetic field around a current-carrying wire is circular.
Increasing the number of turns of a coil decreases the speed of rotation.
The coil in a motor is wound around a core.
Using a soft iron core in a motor coil decreases rotation speed.
Fans and water pumps work due to the motor effect.
The interaction between two magnetic fields is responsible for the motion of the wire.
Only AC can be used to demonstrate the motor effect in the activity.
A more powerful magnet increases the speed of a motor coil.
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The motor effect occurs when:
The shape of the magnetic field around a straight current-carrying wire is:
Reversing the battery polarity causes the wire to move:
A coil in a motor rotates because of:
Which of the following increases motor speed?
Answer: c Which type of current is used in a simple motor demonstration?
Devices that work due to the motor effect include:
The coil of a motor is made of:
What happens when the number of turns of a coil is increased?
Which part enhances the magnetic field in a motor coil?
The production of motion in a wire placed in a magnetic field when current flows through it is called the ______ effect.
The magnetic field around a current-carrying wire is ______ in shape.
The direction of motion of the wire depends on the ______ of current and magnetic field.
The wire moves in the ______ direction when the polarity of the battery is reversed.
A coil of a ______ is formed by winding an insulated wire around a core.
The coil is placed between two ______ magnetic poles.
The coil rotates due to interaction between the magnetic field of the ______ magnet and the field developed in the coil.
Increasing the ______ of turns of the coil increases the speed of rotation.
Using a ______ iron core enhances the speed of the motor coil.
Devices like fans, water pumps, and ______ grinders work due to the motor effect.