MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Earn 100
Describe about the energy transformations in an AC generator.
Important Questions on Electromagnetic Induction
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
If you hold a coil of wire next to a magnet, no current will flow. What else is needed to induce a current?
HARD
Upper Secondary: IGCSE
IMPORTANT
The north pole of a magnet is moved towards a coil of wire, as shown in the figure so that an induced current flows. State two ways in which the student could cause an induced current to flow in the opposite direction.
HARD
Upper Secondary: IGCSE
IMPORTANT
The north pole of a magnet is moved towards a coil of wire, as shown in the figure, so that an induced current flows. State two ways in which the current induced in the coil could be increased.
HARD
Upper Secondary: IGCSE
IMPORTANT
List any four features of a large AC generator from a power station that makes it capable of generating a higher voltage than a model AC generator.
HARD
Upper Secondary: IGCSE
IMPORTANT
Why is electrical power transmitted in the grid at high voltage?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Name the three essential parts of a transformer.
HARD
Upper Secondary: IGCSE
IMPORTANT
A transformer has turns on the primary coil and on the secondary. Is it a step-up or a step-down transformer?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
A portable radio has a built-in transformer so that it can work from the mains instead of batteries. Is this a step-up or step-down transformer?
