Electric Force, Field, and Potential
What happens to the path of a positively charged particle when it enters a uniform electric field perpendicular to its initial velocity?
It stops moving immediately due to attraction.
It continues moving with constant velocity.
Its path remains straight but accelerates parallel to the field.
It follows a parabolic trajectory.
What observation about thermal radiation supported Planck’s hypothesis about quantized energy levels?
All objects emit some form of thermal radiation proportional to their temperature.
Materials absorb thermal radiation more efficiently at higher temperatures.
The spectrum emitted by blackbody radiators at different temperatures is discrete rather than continuous.
Higher temperature objects emit radiation with greater average wavelengths compared to lower temperature ones.
What is the SI base unit for current?
Newton (N)
Watt (W)
Ampere (A)
Kelvin (K)
If equipotential lines are spaced closer together at one end of a charged object, what can be inferred about that region's electric field strength compared to regions where equipotential lines are spaced further apart?
The electric field is stronger where equipotential lines are closer.
Equipotential line spacing does not relate to electric field strength.
The electric field strength is uniform throughout.
The electric field is weaker where equipotential lines are closer.
Assuming coulombic attraction/repulsion is nonlinear rather than inverse-square law following where modifications, what anticipated effect occurs regarding equilibrium positions among multiple fixed equal charges along single plane?
Equilibrium locations shift towards geometrically central points with reduced distance variation among charges.
Charges spread farther apart maintaining radial symmetry owing longer-range effective repulsive/attractive tendencies.
No stable equilibriums exist because any perturbation leads inevitably towards either infinite separation or collapse.
Equilibrium configurations remain identical since net force equals zero regardless nonlinearity degree.
What do equipotential lines indicate about potential difference between any two points on those lines?
There is no potential difference.
The potential difference depends on distance.
The potential difference is maximum.
The potential difference equals the electric field strength.
If the permittivity of free space was doubled, how would the electric field strength between two point charges in a vacuum change, assuming all other variables remain constant?
It would remain unchanged.
It would be doubled.
It would increase by a factor of √2.
It would be halved.

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What happens to a positively charged particle when placed in an electric field?
It moves from lower to higher potential areas
It moves from higher to lower potential areas
Its charge decreases over time due to movement
It remains stationary at its original position
In which scenario would you expect no change in entropy?
A free expansion isolated system ideal gas.
Melting of solid at temperature above melting point.
An adiabatic irreversible expansion of a non-ideal gas.
A reversible isothermal compression of an ideal gas.
What happens to the total resistance in a parallel circuit when another resistor with the same value is added?
It increases proportionally.
It doubles.
It decreases.
It stays the same.