Making Waves
Circuits
Electrostatics
Radiation
100
If you double the frequency of a vibrating object, its period
a. doubles.
b. halves.
c. is quartered.
b. halves.
100
Electric potential, measured in volts, is the ratio of electric energy to amount of electric
a. current
b. voltage.
c. charge.
d. resistance.
c. charge
Potential = Potential Energy / Charge
or V=PE/Q
100
What is the unit of electric current?
Ampere
100
What is a nucleon?
A nucleon is either a proton or a neutron.
200
A sound wave is a
a. shock wave.
b. transverse wave.
c. standing wave.
d. longitudinal wave.
b. transverse wave.
200
In a series circuit, _____ is the same across all electrical elements.
In a parallel circuit, _____ is the same across all electrical elements.
current
voltage
200
When a rubber rod is rubbed with fur, the rod becomes negatively charged due to the transfer of
a. electrons to the fur
b. protons to the fur
c. electrons to the rod
d. protons to the rod
c. electrons to the rod
200
Carbon-12 and Carbon-14 are different
a. isotopes of the same element
b. ions of the same element
c. elements
a. isotopes of the same element
Isotopes of the same element contain different numbers of nucleons (different atomic mass numbers).
300
In Young’s double-slit experiment, a series of bright and dark lines was observed. Which of the following principles is responsible for this phenomenon
a. Polarization
b. Reflection
c. Interference
d. Refraction
c. Interference
Young's Double Slit experiment demonstrated the wave-like behavior of light. When light waves pass through two slits, they interfere with each other and produce alternating bright and dark bands on a screen. Interference is a property of ALL waves.
300
1.5 ohms; 6 ohms.
300
The electrical resistance of a metal wire could be decreased by
a. increasing its temperature
b. increasing its diameter
c. increasing its length
b. increasing its diameter
300
What is the role of the nuclear strong force?
The strong nuclear force acts as a "cement" or "glue" between nucleons. It acts over short distances and helps keep the nucleus together.
400
An observer detects an apparent change in the frequency of sound waves produced by an airplane passing overhead. This phenomenon illustrates
a. The Doppler effect
b. the refraction of sound waves
c. wave amplitude increase
d. wave intensity increase
a. The Doppler effect
400
A 5 Ω resistor is connected to a 30-V battery. The current through the resistor is
a. 5 A
b. 6 A
c. 150 A
d. 30 A
b. 6 A
Ohm's Law: V=IR => I=V/R=30/5=6 A
400
As the distance between the two positively charged spheres doubles, the force of repulsion between them
a. decreases by a factor of 4
b. increases by a factor of 4
c. decreases by a factor of 2
d. increases by a factor of 2
a. decreases by a factor of 4
The electrostatic force follows the inverse square law! Force is inversely proportional to distance squared.
400
For an isotope with a half-life of one day, at the end of three days the amount that remains is
a. One-quarter.
b. One-eighth.
c. One-half.
d. none of the above
b. One-eighth.
After one day, 1/2 remains. After two days, 1/4 remains. After three days, 1/8 remains.
500
Materials generally become warmer when light is
a. reflected by them.
b. absorbed by them.
c. transmitted by them.
d. none of the above
b. absorbed by them.
500
The electric power of a lamp that carries 2 A at 60 V is
a. 60 watts.
b. 30 watts.
c. 240 watts.
d. 120 watts.
d. 120 watts.
power = current x voltage
500
A negatively charged rod approaches a neutral pith ball. In which direction will the pith ball move?
a. A
b. B
c. C
d. D
A.
The atoms of the neutral pith ball will undergo polarization so that the electrons are pushed further away from the negative rod, leaving the left side of the pith ball more positive.
500
When the nucleus of an atom emits a beta particle, the atom’s atomic number
a. decreases by 1.
b. increases by 1.
c. changes by 2.
d. remains unchanged.
b. increases by 1.