16 questions in Magnetism and electromagnetism at Form 5 · BGCSE
Most triedMost missedNewest- A transformer works only with…
- A step-down transformer has 1 000 turns on the primary and 50 on the secondary. With 240 V in, what is the output?
- Which device changes electrical energy into kinetic energy?
- One end of an unknown metal is brought close to the North pole of a permanent magnet. The same end of the metal is then brought close to the South po…
- Which one is not a method of demagnetisation?
- A current carrying conductor is placed between two poles of permanent magnets. Which diagram shows the direction of the force F which acts on the con…
- A bar magnet is cut into three equal magnets as shown in the diagram. In which of the arrangements will attraction take place?
- Different metal blocks are placed between two permanent magnets. Which diagram shows the correct magnetic field pattern between the magnets?
- The ratio of the number of turns in the primary coil to the number of turns in the secondary coil of a step-up transformer is 1 : 5. The transformer …
- The diagram shows four plotting compasses placed next to two current carrying conductors (current moving from the paper, out of the page). Which comp…
- The diagram shows a magnet near a solenoid. The magnet is moved into the solenoid and then moved back out to the original position. Which of the grap…
- The diagram shows a simple direct current motor. Which part of the motor helps to maintain continuous rotation of the coil?
- Which component does a relay operate like in a circuit?
- Which row consists of a magnetic material, non-magnetic material and a magnet under the correct heading?
- What is the reason for not using steel as a core of the electromagnet?
- A transformer steps down 240 V to 12 V. There are 600 turns on the primary coil of the transformer. How many turns are on the secondary coil?