Coulomb’s Law
Write Coulomb’s Law equation.
F = k(q₁q₂)/r²
Electric field direction is defined as the direction a ______ charge would move.
Positive
State Newton’s Second Law.
F = ma
Opposite charges:
Attract
The SI unit of electric charge is:
Coulomb
If the distance between two charges doubles, the electric force becomes what fraction of the original?
1/4
Field lines around a positive charge point:
Outward
A 2 kg object experiences a 6 N force. What is its acceleration?
3 m/s²
Like charges:
Repel
The SI unit of electric field strength is:
N/C
If one charge doubles and distance stays constant, the electric force changes by what factor?
Two
A −3 C charge is placed in an electric field pointing east. The force on the charge points:
West
A 5 C charge is placed in a 4 N/C field. What force does it experience?
20N
Which force is stronger between particles: gravitational or electric?
Electric
Electrostatics refers to electricity at:
Rest
Both charges are tripled while distance remains constant. By what factor does force change?
9
A 4 C charge experiences a force of 20 N. What is the electric field strength?
5 N/C
A 4 C charge is placed in a 5 N/C field and has a mass of 2 kg. What is its acceleration?
10 m/s²
If distance between charges is tripled, the force changes by what factor?
1/9
A 2 C charge in a 3 N/C field experiences what force?
6N
Distance is cut in half AND one charge is doubled. By what factor does force change?
8
A −2 C charge is placed in a 6 N/C electric field pointing north.
Find BOTH magnitude and direction of the force.
12 N South
A 3 C charge is in a 10 N/C field. The object has mass 5 kg.
Find acceleration.
6 m/s²
Two charges produce a force of 200 N when 1 m apart.
What is the force when they are 4 m apart?
(Use inverse square reasoning.)
12.5 N
A 6 C charge is placed in a uniform electric field and experiences a force of 24 N.
Then the charge is moved to a location where the field strength doubles.
What is the new force?
48 N