11. A negatively charged dust particle remains stationary above the ground. This indicates a presence of electric filed directed
a) upward,
b) downward
c) north parallel to the ground,
d) south parallel to the ground
12. A free electron placed in a uniform electric filed
a) moves in the direction of the field lines,
b) moves in the direction opposite to the field lines,
c) remains stationary
id:
he light
b) moves in the direction perpendicular to the field lines,
13. For resistors in a series circuit,
a) the voltage drop is the same across each,
c) the power loss is the same in each,
b) the current is the same in each,
d) the resistance is the same for each.
14. Electric field lines
a) never cross, b) start on positive charges,
c) end on negative charges or go to infinity, d) all of the above
15. Two charges interact with the force F. One of the charges is doubled in value and the separation between the charges doubles.
The new value of the electric force becomes
a) F/4,
c) 2F,
b) F/2.
d) 4F
b) quadruples,
c) stays the same,
d) halves
16. For a photon of double wavelength the energy of the photon
a) doubles,
