Electric Force, Field, and Potential
How does increasing the intensity of light in the photoelectric effect demonstrate wave-particle duality?
It increases the number of ejected electrons but not their kinetic energy.
It increases both the number and kinetic energy of ejected electrons.
It decreases the number but increases their kinetic energy.
It decreases both the number and kinetic energy of ejected electrons.
What impact would there have been on historical models predicting lightning patterns had they accounted for varying atmospheric layers' differing permitivities instead assuming uniformity throughout stratosphere?
Predictions would stay essentially the same, since large-scale phenomena like thunderstorms depend mainly temperature pressure gradients rather than small changes localized electric properties air masses..
Predictions would lead to fewer but more intense strikes, because limited pathways available conduct discharge through non-uniform mediums would necessitate greater buildup potential before reaching critical threshold needed spark event.
Predictions would show concentrated discharges at interfaces between layers diverse properties.
Predictions could result vast number weak sparks spread evenly across effected regions, due distribution smaller pockets increasingly conductive airspace throughout height column considered...
What equation allows you to find the force between two point charges?
F=qvBsinø ,where B equals magnetic field strength.
F= \mu I_{1}I_{2}l/r ,where \mu is permeability of free space.
F= k \left| q_{1}q_{2} \right| / r^{2} , where k equals Coulomb's constant.
F= qE , where E equals electric field strength.
If a system undergoes an isothermal expansion, which of the following best describes the change in entropy of the system?
It decreases because heat flows out of the system.
It increases because heat flows into the system.
It cannot be determined without knowing the specific heat capacity.
It remains constant because temperature does not change.
Which quantity has a basic unit measurement identical to that used for electric permittivity?
Magnetic field strength
Capacitance density
Charge density
Resistance
If two photons with different frequencies but equal intensities collide with metallic surfaces simultaneously, which outcome best illustrates wave-particle duality?
Both photons will eject electrons with the same maximum kinetic energy.
One photon may result in electron ejection depending on the work function of each surface.
Photons with higher frequency will eject electrons with greater maximum kinetic energy.
The photons will eject no electrons due to the absence of sufficient energy.
When a closed system reaches equilibrium after experiencing reversible processes, what will occur if entropy were hypothetically decreased?
The equilibrium would shift towards less disorder.
There would be no effect on equilibrium.
The total amount of usable energy within the system would increase.
The equilibrium would shift towards greater disorder.

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A capacitor is filled with two dielectric materials of permittivities and with ; how does the capacitance change if the boundary between the two materials is perpendicular to the plates compared to when it's parallel?
The capacitance remains the same regardless of orientation.
The capacitance increases when the boundary is perpendicular but decreases back upon charging.
The capacitance will be lower when the boundary is parallel.
The capacitance will be higher when the boundary is parallel.
When using parallel-plate capacitors to investigate dielectric materials, why might results deviate from theoretical predictions at high voltage applications?
Increased voltage reduces the effective distance between capacitor plates due to plate deformation.
Dielectric breakdown occurs at high voltages, leading to deviation from expected behavior.
At high voltages, capacitive reactance increases disproportionately.
Electrostatic shielding effects become more pronounced at high voltages.
How does inserting a dielectric into a charged isolated capacitor affect energy stored if half its volume has twice the permittivity of free space and the other half matches free space?
Energy stored decreases due to increased net electric permittivity over entire volume reducing electric field strength inside capacitor for constant charge on plates since and .
Energy stored increases four times since part having double epsilon causes local doubling relative permitivitty hence quadrupling contained capacity store electrostatically induced work by system provided initial quantity separation charges maintained across plate surfaces throughout process insertion..
Energy stored doubles because energy density increases directly proportional with increase in permittivity according to relation where represents electric field intensity within dielectric material inserted into capacitor..
Energy stored remains unchanged because presence or absence of dielectric doesn't influence total amount charge residing on plates thereby keeping potential difference across them constant which directly relates how much electrostatic energy can be held by system based on principle conservation electrical energy..