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WorksheetsQ2 Interim Review
Total questions: 54
Worksheet time: 40mins
Discuss how the total amount of charge possessed by the system of two blocks before the charging process compares to the total charge of the system after the charging process.
The total charge remains the same before and after the charging process.
The total charge increases after the charging process.
The total charge decreases after the charging process.
The total charge is zero before and after the charging process.
Can electrons move between the two blocks if they are not touching?
Yes, electrons can move between the blocks without touching.
No, electrons cannot move between the blocks without touching.
A metal block has a charge of -10 units. What will happen when contact is made between the block and the grounding rod?
Electrons will move from ground to block and the block becomes more negatively-charged.
Electrons will move from block to ground and the block becomes neutral.
Electrons will move from ground to block and the block becomes neutral.
Electrons will move from block to ground and the block becomes more negatively-charged.
What effect does the distance between objects have on their gravitational force?
Gravitational force increases with distance.
Gravitational force decreases with distance.
Gravitational force remains constant regardless of distance.
Gravitational force is not affected by distance.
When a magnetic needle is placed in the Earth’s magnetic field, it __________ with the Earth’s __________ __________.
aligns,
electric field
points,
North Pole
aligns,
South Pole
deflects,
Equator
What tool measures the direction of a magnetic field?
Voltmeter
Compass
Light bulb
Ruler
When a motor turns on – why does the loop turn?
The battery pushes protons through the wire to produce electric current and cause magnetism.
The battery causes the permanent magnet to move electrons and make an electric field.
The battery moves electrons through the wire, creating a magnetic field, causing it to attract and repel from the poles of the permanent magnet.
The permanent magnet moves and produces an electric current.
If there is 2 N of gravitational force between two objects, and then the distance is doubled, what would be the new force?
1 N
4 N
1/4 N
1/2 N
A gravitational field is generated by any object that has what property?
Mass
Magnetism
Charge
Conductivity
CALCULATOR QUESTION: What is the gravitational force between two 100 kg objects located 10 m from each other?
100 N
9*10^11 N
667 N
6.67*10^-9 N
What is the value of the universal gravitational constant used in this module?
6.67 x 10^-11
9 x 10^9
3 x 10^8
8.85 x 10^-12
What is the effect on gravitational force if the distance between two objects is halved?
it halves
it doubles
it fourths
it quadruples
What is the equation for the Gravitational Force?
F = G(m1+m2)/r^2
F = G(m1*m2)/r^2
F = G(m1*m2)*r^2
F = G(m1*m2)/r
By Coulomb's Law: If the charge of both particles is doubled, the force is –
Unchanged
Doubled
Quadrupled
Halved
The amount of attraction between two massive objects which are not in contact with each other is known as the _________.
Magnetic Force
Normal Force
Gravitational Force
Electric Force
When do gravitational forces exist between two objects?
They only exist between microscopic objects.
Gravitational forces only act on objects falling on Earth.
They only exist for objects in space.
They are always present between any two objects.
CALCULATOR QUESTION: Calculate the gravitational force between a 15-kg chinchilla and a 65-kg dog which are separated by 0.30 m.
Fg = 3.7*10-8 N
Fg = 1.1*105 N
Fg = 1.3*1012 N
Fg = 7.2*10-7 N
What is the rule that determines how to draw Electric Field Lines
Lines connect charges
Arrows point away from negative charges and towards positive charges
Arrows point away from positive charges and towards negative charges
Using the right hand rule: thumb aligns with current and finger curl determines field lines
If a current is directed into the page then the resulting magnetic field will point
up
Clockwise
Counterclockwise
down
CALCULATOR QUESTION: What would the gravitational force be between the Sun and Jupiter if they were 2.3*1011 m apart? The masses for the Sun and Jupiter are 1.99*1030 kg and 6.42*1023kg, respectively.
Fg = 3.8*1015 N
Fg = 1.6*1021 N
Fg = 2.8*10-42 N
Fg = 4.6*10-75 N
When calculating the r value for gravitational force, where do we measure between two objects?
The sum of their diameters
From the closest edge of one to the closest edge of the other
From the center of one object to the center of the other
The radius of one of the planets
The region in which a magnetic force can be detected is called a(n) _______.
Magnetosphere
Ferromagnetic
Electromagnetic induction
Magnetic field
Electromagnetism
Electromagnets show the interaction of–
electric current and electric charges.
electric charges and magnetic dipoles.
magnetic fields and iron filings.
magnetic fields and electric currents.
What is the process by which a changing magnetic field creates an electric current?
Ferromagnetic
Electromagnetism
Magnetic Field
Electromagnetic induction
How can the electromagnet be made stronger?
Add more coils (turns) of wire to the nail
Reverse the poles of the magnet
Use a smaller battery
Reverse the flow of charge in the circuit
When an object gains electrons it becomes __________
Neutral
Positively charged
Negatively charged
In the RIGHT HAND RULE, what do the fingers represent?
The direction of the magnetic field
The direction of the force
The direction of the electric current
The direction of the voltage
How does a motor work?
Current generates an electric field around the loop of wire. The electric force causes the loop of wire to rotate.
The magnets in the motor attract and repel the metal in the copper wire that makes up the loop. This causes the loop to rotate.
Current generates a magnetic field in the loop of wire that is then attracted and repelled by the magnet(s) in the motor.
A device that transforms electrical energy to mechanical energy is a
Transformer
Generator
Motor
Electromagnet
A device that transforms magnetic force energy to electrical energy is a
Transformer
Generator
Motor
Electromagnet
The area around a magnet is called the .....
attraction zone
work area
magnetic field
hot zone
The strongest parts of the magnet are ...
fronts
backs
poles
middle
A compass needle responds to a magnetic field, because the compass needle is a
A. generator.
B. motor.
C. magnet.
D. transformer.
Which one represents the magnetic field lines of magnets repelling?
A
B
When running a current through a wire, what do the blue lines represent?
The wire spinning
A magnetic field that was created
Electrons leaving
Electricity
What does this image show?
Parallel circuit
Series circuit
Magnet
Electromagnet
Using the right hand grip rule, A represents the direction of the
current
magnetic field
What is an electromagnet?
a magnet that becomes neutral due to electricity
a magnet created by electric current flowing through wires
a magnet that produces electricity
a electrical current that has magnets
To make this electromagnet stronger you could
use less wire
have fewer wire coils around the nail
have more wire coils around the nail
use a plastic core
Using the right hand grip rule, if the current is flowing towards you then the magnetic fields will flow from...
A to D to C to B and around
A to B to C to D and around
A to C to D to B and around
A to C to B to D and around
Like particles _____ and opposite particles _____.
As the distance between two charges increases, the force between the two charges (a) (increases, decreases, stays the same).
As the distance between two masses increases, the force between them (a) (increases, decreases, stays the same).
Which pair of masses experience more force?
Top
Bottom
Both experience the same amount of force.
No way to determine.
As charge increases, the electrical force (a) (increases, decreases, stays the same)
This graph shows the mass of planets in our solar system (and some moons) compared to Earth. Judging by it's mass, which planet would you say has the strongest gravitational pull?
Uranus
Jupiter
Saturn
Earth
Pluto
Electric current would be produced in the magnet.
The magnet would do nothing to the coil of wire.
Electric current would be produced in the copper wire
It would make the copper wire produce a magnetic field.
If you wrap more coils around an the nail,
the battery will stop working
the nail's magnetic field will get stronger
the nail's magnetic field will get weaker
the nail's magnetic field stays the same
Can you produce current in a stationary wire with a magnet that is not moving?
Yes, having a magnet near a wire is enough to produce current in a wire
No, the magnetic field has to be changing to produce current in a wire.
No, magnets cannot produce current in a wire
As two oppositely charged particles approach each other, what happens to the electrical force between them?
The attractive force increases
The magnitude of the electric force decreases
The repulsive force increases
The magnitude of their charges increases
This model of the balloon shows ______ positive charges than negative charges. So this balloon is _____ charged.
fewer/positively
more/positively
fewer/negatively
more/negatively
