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Jouer Froggy Jumps
1. What is the unit of electric charge?
A
Ampere
B
Coulomb
C
Volt
2. What is the formula for electric field?
A
E = F*d
B
E = q/F
C
E = F/q
3. What is the SI unit of electric field?
A
J/C
B
N/C
C
V/m
4. What is the direction of electric field lines?
A
From positive to negative charge
B
From negative to positive charge
C
They have no direction
5. What is the difference between polarization and induction?
A
Polarization is temperary and induction is permanent.
B
There is no difference
C
Polarization moves the electrons from one to another object and induction just pushes them away
6. What is an example of a material that can be polarized?
A
A conductor
B
A magnetic material
C
An insulator
7. What is the purpose of polarization?
A
To create a chemical reaction
B
To create a charge separation in a material for various applications
C
To create a magnetic field
8. What does the density of electric field lines represent?
A
The distance between charges
B
The charge of the particles
C
The strength of the electric field
9. What is the shape of electric field lines around a point charge?
A
Radial and symmetric
B
Straight and parallel
C
Circular and asymmetric
10. What happens to the electric field lines when they encounter a conductor?
A
They pass through the conductor
B
They change direction
C
They terminate or begin at the surface of the conductor
11. What is the electric field inside a conductor?
A
Zero
B
Variable
C
Constant
12. The direction of the field lines is based on a
A
positive point charge
B
negative point charge
C
neutral point charge
13. What is Colomb's Law?
A
A law that describes the motion of planets.
B
A law that describes the behavior of gases.
C
A law that describes the electrostatic interaction between charged particles.
14. What is the formula for Colomb's Law?
A
F = k * (q1 * q2) / r^2
B
F = P * A
C
F = m * a
15. What does 'k' represent in Colomb's Law?
A
The Coulomb constant.
B
The mass of the charged particles.
C
The distance between the charged particles.
16. What happens to the force between two charged particles if the distance between them is doubled?
A
The force remains the same.
B
The force increases by a factor of 2.
C
The force decreases by a factor of 4.
17. What is the direction of the force between two charged particles with the same sign?
A
No force
B
Attractive
C
Repulsive