Electric Force, Field, and Potential
Which rule determines the direction of the electromagnetic force on a positive charge moving in a magnetic field?
Right-hand rule
Bernoulli’s equation
Left-hand rule
Pascal’s principle
What happens to an alpha particle when it enters perpendicularly into a uniform magnetic field?
It follows a circular path due to experiencing constant perpendicular force.
It follows a parabolic trajectory similar to projectile motion under gravity.
Its speed increases linearly because of continuous acceleration from the magnetic force.
It continues in straight-line motion because no net force acts on it.
What happens when you double both capacitance & switching frequency within RC low-pass filter?
Doubling reduces cutoff frequency leading less attenuation high frequencies doubling causes greater signal loss above original cutoff frequency.
Doubling leads directly doubled cutoff frequency resulting better high-frequency response without changing .
Increasing both parameters results unchanged overall filtering effect since changes cancel out.
Decreasing capacitance increasing switching frequency simultaneously improves performance maintaining same level filtration.
What experimental procedure could most precisely determine differences in electrical field strength caused by various dielectric materials inserted between parallel plate capacitors without introducing significant systematic errors?
Measuring capacitance change via LC resonance frequency shift when different dielectrics are placed between calibrated parallel plates connected in a circuit with known L value.
Recording time taken for small test charges released near positive plate surface to traverse set distance influenced by distinct dielectric media using high-speed camera analysis.
Comparing deflection angles of electron beams passing through varying dielectrics situated within homogeneous capacitor fields measured by fluorescent screen markings.
Monitoring potential difference across capacitor plates with high-resolution voltmeter as several dielectrics are swapped sequentially under constant charge conditions.
What will happen if two identical positively charged spheres are partially submerged in oil (a medium with higher dielectric constant than air) instead of being completely surrounded by air?
The gravitational attraction between them dominates over electrostatic repulsion.
The electrostatic repulsion between them decreases.
The electrostatic attraction between them increases.
The electrostatic repulsion between them remains unchanged.
Which experiment confirmed the existence of electric forces acting at a distance?
Coulomb's torsion balance experiment
Rutherford's gold foil experiment
Millikan oil-drop experiment
Young's double-slit experiment
What effect does increasing enthalpy have on a chemical reaction at constant pressure and temperature?
The reaction releases heat into its surroundings (exothermic)
Temperature automatically increases even if stated as constant initially
There's no effect; enthalpy doesn't affect reactions at constant conditions
The reaction absorbs heat from its surroundings (endothermic)

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Which statement best describes relationship between magnetic flux linkage L coil number turns N around ferromagnetic core carrying alternating I?
Since inversely proportional remains same regardless varying unless core saturation reached affecting permeability.
As increases proportionally increases provided stays constant given material's properties remain stable
Decreases linearly opposite direction compared keeping magnitude change uniform throughout operation range
Increases exponentially respect decreasing rapidly once reaches critical level causing nonlinearity behaviour
In which direction does the conventional current flow relative to the movement of electrons?
From positive to negative terminals
Is random and depends on the material of the conductor
From negative to positive terminals
In the same direction as electrons
In which scenario would two charged particles NOT experience any change in electrical potential energy if moved closer together?
When one particle has zero net charge rendering electrical interactions negligible.
When both particles carry identical positive charges but are bound by an external force.
When charges are submerged in a dielectric medium that cancels out electrostatic forces through polarization.
When one particle is much more massive than another reducing relative acceleration.