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WorksheetsPhysics - Forces
Total questions: 44
Worksheet time: 25mins
Magnets A and B are equally strong. In what position will the 2 magnets be most strongly attracted?
A
B
C
D
Which point on the magnet would have the strongest attraction to the south pole of another magnet like this one?
A
B
C
D
If the two poles of these magnets repel each other what should we see?
North end
South end
either end
neither end
To which end of the horseshoe magnet will the north end of the magnet be repelled?
North end
south end
either end
neither end
The compass is pointing towards the correct end of the magnet
true
false
not enough information
This diagram shows the proper direction of the magnetic field lines
True
False
This diagram shows the proper direction of the magnetic field lines
True
False
A material that can be permanently magnetized is generally said to be electromagnetic!
True
False
All matter is made of atoms with moving ____________. Moving __________create a magnetic field
(a)
Our geographical poles and magnetic poles are in opposite places
True
False
The geographical north pole, is also our magnetic north pole
True
False
The earth’s magnetic field
has a north magnetic pole at the same spot as the geographical north
is what causes compasses to work
is what causes electromagnets to work
all of these are true
Earth is a kind of magnet
True
False
Which of the following is not particularly ferromagnetic?
iron
cobalt
gadolinium
gold
Why doesn't the moon revolve around the sun?
The earth is closer
The sun is closer
The moon has a greater gravitational pull
Gravitational forces are
Attractive
Repulsive
Can be attractive or repulsive
neither attractive or repulsive
A similarity between Gravitational and Electric Fields:
Neither are repulsive
There is no negative mass
They share the Inverse square law (both r^2)
They both use electricity
A difference between gravitational and electric fields:
Only one of them uses the Inverse square law (r2)
Gravity is never repulsive unlike electric which can repulse or attract
Their equations are similar
They have an annoying amount of math
Which formula is this for?
Coulomb's Law
Gravity
Magnetism
Pythagoras
The acceleration due to gravity is zero at the...
Sea level
Equator
Poles
Center of the Earth
The Earth's mass is 5.98 x 10^24 kg
True
False
Earth is attracted to the sun by the latter's [blank] force
inertia
friction
gravitational
What is the gravitational attraction between the earth and a satellite if the distance is 80,420 km?
160 N
210 N
320 N
200
The [blank] interacts and moves under the influence of both the Sun and the Earth simultaneously
moon
gravity
force
both force and gravity
If Earth's radius shrank to one-half of its current size, but its mass remained the same (a)
This is the formula for Coulomb's Law
True
False
2 spheres each have a charge of -0.0025 C and are separated by a distance of 8 m. What is the Electrical force?
769 N
669 N
949 N
none of these are right
According to Coulomb's Law, what happens when "like charges" are placed near each other?
Repel
Attract
Neither
Can be either
What happens to the force of attraction if the charges are placed closer together?
gets weaker
gets stronger
neither
In coulomb's law K = 9,000,000,000 or 9 x 10 to the [x] power C
6th power
7th power
9th power
11th power
Suppose that 2 point charges, each with a charge of +1.00 C are separated by a distance of 1m. The charges will...
attract
repel
Suppose that 2 point charges, each with a charge of +1.00 C are separated by a distance of 1m. Calculate the magnitude
9,000,000
9,000,000,000
9,000
none of these are correct
What is the electrical force between 2 balloons, each having 5.00 of charge, that are 0.300 m apart?
7.5 x 10^10 or 75,000,000,000
5.0 x 10^9 or 5,000,000,000
1.5 x 10^10 or 15,000,000,000
2.5 x 10^12 or 2,500,000,000,000
How does the force of attraction between a proton and electron vary with distance between them?
The further away they get the weaker the attraction
The further away the stronger the attraction
The distance doesn't matter when calculating
The force doesn't matter when calculating
In which of the following diagrams is the attractive force between the two charges the least?
A
B
C
D
If two nearby charges are positive, they will [blank] each other
repel
attract
can be either
Field forces: gravitational, electric and magnetic
All both attract and repel
Gravitational forces only repel
Only electric attracts and repels
Electric and magnetic both attract and repel
Which force is shown in this electric field?
Attracting force
Magnetic force
Repelling force
Destructive force
An electric field has
Magnitude
Direction
both of the above
neither of the above
Electric field lines never cross
true
false
The red subatomic particles
represent the protons (p+)
represent the electrons (e-)
represent the neutrons (n0)
materials that allow charges to move about easily
conductor
inductor
transistor
Grass, dry wood, most plastics, cloth, dry air are all good examples of a
conductors
inductors
previous metals
the study of electric charges that can be collected and held in one place
Electrostatics
Magnetism
Gravatonics
Ferromagnetism
