Electric Circuits
What happens to the total voltage across a parallel combination of identical resistors when another identical resistor is added in parallel?
The total voltage across each branch remains unchanged.
The total voltage doubles across each branch.
The total voltage increases across each branch.
The total voltage decreases across each branch.
If a capacitor in an RC circuit is replaced with another capacitor having double the capacitance, how will the time constant of the circuit change?
The time constant will double.
The time constant will remain unchanged.
The time constant will halve.
The time constant will quadruple.
What is the unit of electric current?
Ampere
Coulomb
Ohm
Volt
If you double only one resistor's resistance in a parallel circuit at steady state, what happens to its individual power consumption?
It decreases
There's no change in its consumption
It doubles along with resistance
It increases four times
A capacitor with capacitance C within a steady-state circuit has stored energy W; how will this energy change if its capacitance were doubled while keeping voltage constant?
Will quadruple
Will remain same
Will double
Will halve
In a series LRC circuit at resonance, what relationship between current and voltage would cause power factor to equal unity?
Current and voltage are in phase.
Current leads voltage by 90 degrees.
Voltage leads current by π/2 radians.
Current lags voltage by π radians.
When comparing two light bulbs connected in series versus two identical ones connected in parallel to an ideal battery, how do their brightnesses compare assuming bulb resistance remains constant?
Brightness cannot be determined without knowing specific values for voltage and resistance.
Bulbs are brighter in parallel compared to when they're in series.
Series-connected bulbs are brighter due to increased power dissipation.
Both configurations result in equally bright bulbs because total power used is conserved.

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How does an insulator affect an electric circuit if placed between two conducting wires?
It transforms AC into DC in the circuit.
It prevents or significantly reduces current flow between them.
It increases the current flow between them.
It has no effect on current flow between them.
If you double the distance between two point charges, what effect does this have on the electric force between them?
The force becomes one-fourth as strong.
The force becomes four times stronger.
The force remains unchanged.
The force becomes twice as strong.
What happens to the total energy in a simple closed circuit with a resistor and no other components when it reaches steady state?
It remains constant
It slowly decreases until zero
It continuously increases
It oscillates between high and low values