All content (physics) Flashcards
Magnetic and electric field lines always go
From positive to negative, or from North to South
How can air be made to conduct electricity
If a strong electric field comes into contact with the air, it will ionise the air particles, and cause the air to be able to conduct
Which waves can penetrate all the way through the earth
P waves
Are P waves trans or long
Long
In a denser medium, will transverse waves travel faster or slower
Slower
If a wave enters a denser medium, which way will it bend
Towards the normal
What is the motor effect
The idea that a current carrying wire in the the presence of a magnetic field will experience a force
In fleming’s left hand rule, what do you match up with the direction of magnetic field
index finger (point from N to S)
In fleming’s left hand rule, what do you line up the middle finger with
The direction of current along the wire
As heat gets more, what happens to the resistance in a thermistor
It decreases
As light gets more, what happens to the resistance in a light dependant resistor
It decreases
What is the symbol for a variable resistor
A resistor with a diagonal arrow running through
pV =
Constant
What is an objects internal energy?
The total energy stored by the particles
What is an objects specific latent heat
The amount of energy required, to change the state of 1 kg of a substance
