6 Magnetism and electromagnetism

Practice questions on Magnetism and electromagnetism

• A bicycle dynamo generates electricity to power a front lamp. The dynamo works by rotating… (4 marks, Explain)
• A straight current-carrying wire is placed at right angles to a uniform magnetic field and… (4 marks, Describe)
• A loudspeaker contains a coil attached to a cone placed inside a magnetic field. Explain h… (4 marks, Explain)
• A steel paper clip is held close to, but not touching, the north pole of a permanent bar m… (4 marks, Explain)
• A student has two materials, steel and soft iron, and wants to use one of them to make a p… (4 marks, Explain)
• A compass needle is placed near a bar magnet. Describe what is meant by a magnetic field a… (4 marks, Describe and Explain)
• A student places an unmagnetised iron nail and an unmagnetised steel nail into the same ma… (4 marks, Explain)
• A student strokes an unmagnetised cobalt rod several times in the same direction with one … (4 marks, Explain)
• A student investigates the generator effect by pushing a bar magnet into a coil of wire co… (4 marks, Explain)
• A DC electric motor contains a rectangular coil of wire suspended between the poles of two… (4 marks, Describe)
• A student places a straight wire connected to a battery inside a magnetic field. The wire … (4 marks, State)
• A straight conducting wire is moved through a magnetic field and a voltage is induced acro… (4 marks, Describe)
• A coil of wire is connected to a sensitive galvanometer. A bar magnet is pushed quickly in… (4 marks, Describe and Explain)
• A rectangular coil of wire is connected to a sensitive galvanometer and is rotated steadil… (4 marks, Describe)
• A wind turbine generates electricity by rotating a coil of wire inside a magnetic field. S… (4 marks, Explain)