easy question
Creator question
Laws
Formulas
Type of attraction
100
what is magnectic
property of a material that describes its ability to exert a force on a magnet or a magnetic material.
100
Coulomb's law says that the force between any two charges depends
A.directly on the size of the charges
B.inversely on the square of the distance between the charges
C.both are correct
Both are correct
100
The q in Coulomb\'s law stands for
the charge of charged objects
100
Colombs formula
Fe = keq1q2/r2.
100
Telling what of each of the following objects as a permanent magnet, an object able to be magnetized, or neither.
- paper clip
- wooden table
- car body
- compass needle
- Paper clips can be magnetized because they are made of steel, but without a magnet around, they aren’t magnetized.
- A wooden table cannot become magnetized.
- A car body is made of a metal that can become magnetized if brought into a magnetic field.
- A compass has a needle that is always magnetized, so it is a permanent magnet.
200
what is ferromagnetic
a type of substance, such as iron, that experiences strong magnetic forces when in the presence of a magnet. Iron, nickel, and cobalt are ferromagnetic materials.
200
The force of attraction or repulsion between two charges q1 and q2 at a distance d meters apart is proportional to the product of charges q1 and q2 and is inversely proportional to the distance square between the two charges. Above statement is attributed as:
a) Lenz’s law
b) Faraday law
c) Coulomb’s law
d) Maxwell’s law
c) Coulomb’s law
200
Coulomb law is usually applied in the area of
A. Electromagnetics
B. Electrostatics
C.Magnetism
D. Gravitation
Electrostatics
200
which of these are coulombs formula?
k = 9 x 10^9
200
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ___.
-,+
300
What is electrostatics
study of electric charges at rest.
300
Which of the following is equivalent to 1 volt
A. Newton/sec
B. Joule/sec
C.Joule/Coulomb
D.None of these
C.Joule/Coulomb
300
Coulomb law can be derived from which law?
A. Biot Savart law
B. Lenz law
C. Ampere law
D.Gauss law
Gauss law
300
What should be the value of a dielectric material?
A. infinity
B.1
C.0
D.none of these
infinity
300
At which point is the electric field the strongest
B
400
what is permanent magnet
magnetic object that retains its magnetism even when it is not in an external magnetic field.
400
What is the unit used for measuring electric charge
A. Ampere
B. Farad
C.Volt
D.Coulomb
D.Coulomb
400
Which law states the force between electric charges
A.Ampere's law
B.Coulomb's law
C.Ohm's law
D.Lenz's law
Coulombs law
400
A positive charge of 6×10-6 C is 0.040m from the second positive charge of 4×10-6 C. Calculate the force between the charges.
Given
q1 = 6×10-6 C
q2 = 4×10-6 C
r = 0.040 m
Sol.
Fe = 134.85 N
400
Which combination would have an attraction?
A,. electrons and protons
B.none of them
C.neutrons and protons
electrons and protons
500
what is electrically neutral
object that has a net charge of zero.
500
What is coulomb first name
A. Charles-Augustin de Coulomb
B. Alexander the great
C. Albert Einstien
Charles-Augustin de Coulomb
500
As per Coulomb's law, the force of attraction or repulsion between two point charges is directly proportional to the
A. the sum of the magnitude of charges
B. square of the distance between them
C. cube of the distance
the sum of the magnitude of charges
500
Problem 4: Two-point charges, q1 = +9 μC and q2 = 4 μC, are separated by a distance r = 12 cm. What is the magnitude of the electric force?
given
k = 8.988 x 109 Nm2C−2
q1 = 9 ×10-6 C
q2 = 4 ×10-6 C
r = 12cm = 0.12 m
Fe = 22.475 N
500
The symbol d in Coulomb's law equation represents the distance from ___.
g. B to F