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_____________ is the sure test for magnetism.
Repulsion
Which type of magnet is used in cranes?
Electromagnets
Which type of magnet is used in speakers?
Electromagnets
____________ poles of magnet attract each other.
Unlike
____________ poles of magnet attract each other.
Unlike
Electromagnets are which type of magnets: permanent or temporary?
Temporary Magnets
What is the purpose of armature in the electric bell circuit?
To make and break the circuit
The electric bell will ring even when the switch is open. True or false?
False
By using soft iron core electromagnetism can be increased. True or false?
True
___________ beats the gong until current flows in the circuit?
Striker
State the law of magnetism?
Like poles repel unlike poles attract
The space around the magnet where its effect can be felt is called _________.
Magnetic field
__________ can be used to remove metallic dust from the wounds.
Electromagnets
