Electric current
Potential difference
Resistance
Magnets
General physics
100
What is defined as the rate of flow of electric charges
Electric current
100
Potential difference is sometimes called ___________.
Voltage.
100
What is the SI unit for measuring electrical resistance?
Ohm.
100
The the poles of a magnet.
North and south.
100
In the equation F=ma, what a?
Acceleration
200
What is the SI unit for electric current?
Ampere (A)
200
The SI unit for measuring potential difference is the ______________.
Volt (V)
200
Define electrical resistance.
Ratio of the potential difference across a component to the current across it.
200
What happens when a north pole of a magnet meets another north pole?
They repel.
200
What is the speed of light?
3 x 108 m/s
300
What equipment is used to measure current?
Ammeter or multimeter in ammeter mode.
300
What device is used to measure the potential difference accross two points in a circuit?
Voltmeter or Multimeter in voltmeter mode.
300
An electrical component with very high electrical resistance.
Insulator
300
Which material is commonly used to make a temporary magnet?
Iron (Fe)
300
What is the name of the galaxy that we live in?
The Milky Way galaxy
400
They will get dimmer/ brightness will reduce/ decrease.
400
How do the potential differences across different electronic components connected to other, in parallel, compare?
They are the same.
400
In a series circuit, the total electrical resistance of the circuit is equal to _____________________.
the sum of all the individual resistances of the components connected in the circuit.
400
A wire that carries electric current has a magnetic field. Is this true or false?
True.
400
A famous Shanghainese physicist who won a Nobel price in physics in 1957.
Tsung-Dao Lee (李政道)
500
What law is used to describe current at a junction in a parallel circuit?
Kirchhoff's current/ 1st law
500
Emf is can be defined as the potential difference across a _____________ when no current flows.
An electrical energy/ power source
500
The electrical resistance of a conducting wire is proportional to its ____________ and _____________.
length and resistivity
500
A compass points to the _____________magnetic pole of the Earth.
south
500
What theory has the leading scientific explanation for how our universe began and evolved?
The Big Bang Theory