Magnetism
A magnetic south pole repels
a magnetic south pole
Which particle carries the negative charge?
Electron
In what circuit would the components voltage be the same as the supply voltage?
Parallel
Which mains supply wire should a fuse be connected to?
Live
The rate of change of momentum is equal to
The net force.
The region around a magnet where another magnet or magnetic material or moving charge (in a certain orientation) experiences a force
magnetic field
What is the SI unit of electric charge?
Coulomb
This electronic component uses magnetism as a switching mechanism.
Relay coil
The other name for earthing is
Grounding
The earliest known human-made flying device is the kite. In which country was there archeological and historical evidence to support this?
China
The three primary elements used to make magnetic materials.
Iron, nickel and cobalt.
What is the current when 4.3 MC flow through a point in 0.34 hours? Give your answer in SI units and to 2 s.f.
3500 A
NTC stands for
Negative Temperature Coefficient
A parallel circuit has electronic components which normal currents 0.9A, 12.6A and 1.7A. Suggest a suitable fuse rating for a single live wire connecting the components to mains supply.
16–20 A,
3 of these particles make up a proton.
Quarks
The SI unit for magnetic field.
Tesla
What group of materials have a 'sea of free electrons'?
Metallic Conductors
In which potential divider circuit configuration is it possible to vary the voltage across a component by a larger range?
The potentiometer configuration
In what way would appliances without earth wire provisions be made safe from electric shocks?
Using double insulation.
The latest mission to the Tiangong.
Shenzhou-20
The geographic north pole of the Earth is closer to its
magnetic south pole
This quantity has the unit Ωm.
Resistivity
The potential difference across a power source in a real circuit can only be equal to the emf when
No current flows through the circuit
Why won't a bird perched on a high voltage live wire not get electrocuted?
No potential difference across any two points on the bird.
What type of energy is responsible for the accelerated expansion of the universe?
Dark Energy