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Why does the electromagnet in an electric bell lose its magnetism after the hammer strikes the gong?State the basic law of magnetism.What three factors can increase the magnitude of an induced current in a coil?What are magnetic materials?What is the reading of a galvanometer when a magnet remains completely stationary inside a coil?Distinguish between permanent and temporary magnets based on their magnetic retention.What is an artificial magnet?Why are MRI scans potentially problematic for people with metallic implants?Why does the hammer of an electric bell strike the gong when the push button is pressed?Explain the directive property of a magnet.What happens to the galvanometer needle when a magnet is moved away from a wire coil?Why is repulsion considered the surest test of magnetism?What makes an MRI scan preferable over a CT scan for imaging organs and soft tissues?How does the direction of electric current determine the magnetic poles of an electromagnet?Define electromagnetic induction.What happens to the poles of a bar magnet when it is broken into two parts?State Faraday’s first law of electromagnetic induction.Describe the construction of an electromagnet.List four different uses of electromagnets.
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Chapter: 08. Magnetism
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