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WorksheetsElectric Force
Total questions: 12
Worksheet time: 15mins
Objects become electrically charged as a result of the transfer of
protons.
electrons.
neutrons.
nuclei.
The nucleus of an atom has _______________ electric charge.
a positive
a negative
a neutral
both positive or negative
Rubbing a balloon through dry hair gives the balloon a _______________ electric charge.
positive
negative
neutral
balanced
A repelling force occurs between two charged objects when the charges are of
unlike signs.
like signs.
equal magnitude.
unequal magnitude.
An attracting force occurs between two charged objects when the charges are of
unlike signs.
like signs.
equal magnitude.
unequal magnitude.
Electric charge is
found only in a conductor.
not conserved.
conserved.
found only in insulators.
The property by which two monochromatic light waves wavelengths maintain a constant phase relationship is an example of
coherence.
dispersion.
interference.
refraction.
In a double-slit interference pattern, the path length from one slit to the first dark fringe is longer than the path length from the other slit to the fringe by
three-quarters of a wavelength.
one-half of a wavelength.
one-quarter of a wavelength.
one full wavelength.
In a double-slit interference experiment, a wave from one slit arrives at a point on a screen one wavelength behind the wave from the other slit. What is observed at that point?
dark fringe
bright fringe
multicolored fringe
gray fringe, neither dark nor bright
Coherence is the property by which two waves with identical wavelengths maintain a constant
amplitude.
frequency.
speed.
phase relationship.
light falls on two slits spaced 0.33 mm apart.If the angle between the first dark fringe and the central is 0.055, what is the wavelength?
316 x10-9m
3.16 x10-9m
633 x10-9m
211 x10-9m
Monochromatic light with wavelength of 750 nm passes through two narrow slits. If the slits are( 25 x10-6 m) apart, at what angle will the fourth order bright fringe appear on a viewing screen?
4.3O
6.0O
6.9O
7.8O
