Measurement
1
What are the three sub-atomic particles of an atom?
Protons, Neutrons and Electrons
What is direct current?
Current that can only travel in one direction
Like poles of a magnet _________
Repel
Is a magnetism a contact or non-contact force?
Non-contact
What is the word given to 'how consistent results are when measurements are repeated'?
Precision
In order for a circuit to work, will the 'switch' be open or closed?
Closed
What is alternating current?
Current that often and quickly changes direction
Unlike poles of a magnet _________
Attract
True or False: the magnetic field lines travel from the South pole of a magnet to the North pole
False
What is the word given to 'how close a measurement is to the true value'?
Accuracy
Who discovered the rule V = IR?
( name)
Georg Ohm
What is Ohm's Law?
V = IR
F = BIL
This happens when a current carrying wire is placed in a magnetic field
Force is acting on it
How many significant figures does 0.00304 have?
What is the difference between a series and parallel circuit?
Electrons only have one path in a series circuit, electrons have more than one path in a parallel circuit.
What is the main rule for calculating power when voltage and current is known?
P = IV
Down
A wire of length 1m passes through a magnetic field of strength 2T and carries a charge of 3A. What is the magnetic force acting on this wire?
6N
How can we measure the interval of significance?
What is static electricity?
The build up of electrical charge on the surface of an object
What is the difference between electron flow and conventional current?
Electron flow describes the movement of electrons from the negative terminal of a battery to the positive terminal, and conventional current describes current as moving from the positive terminal to the negative terminal
Why does a compass needle point in the direction of north?
What are 3 primary metals that are attracted to magnets?
Iron, Nickel, Cobalt