Physics Flashcards
WHY CAN'T I HAVE ONE NORMAL PHYSICS TEACHER???
1
Q
What is an open system?
A
One that can gain or lose energy from the surroundings
2
Q
Describe what happens during beta decay.
A
A neutron decays into a proton and an electron, the electron is emitted as a beta particle.
3
Q
What is Ohm’s law?
A
Voltage = Current x Resistance
4
Q
What voltage is mains electricity?
A
240 V
5
Q
How does a fuse work?
A
Fuses have a thin wire, which melts when the current is too high, breaking the circuit.
6
Q
What are 3 advantages of nuclear power?
A
- Reliable
- Produce lots of electricity
- Don’t release greenhouse gases
7
Q
What do step-up transformers do?
A
- Increase voltage
- Decrease current
8
Q
What do step-down transformers do?
A
- Decrease voltage
- Increase current
9
Q
What is the voltage of mains electricity?
A
230 V
