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WorksheetsUNIT 1: DC CIRCUITS
Total questions: 10
Worksheet time: 2mins
A resistor (R):
Stores energy in a magnetic field
Stores energy in an electric field
Dissipates electrical energy as heat
Converts DC to AC
An inductor (L) primarily opposes:
Voltage
Current
Change in current
Change in voltage
An ideal independent current source:
Maintains a constant voltage
Maintains a constant current regardless of voltage
Its current depends on circuit resistance
Cannot supply power
Kirchhoff’s Current Law (KCL) states that:
Sum of voltages around a loop is zero
Sum of currents entering a node equals sum of currents leaving
Voltage divides inversely in parallel
Power is constant in any closed loop
In nodal analysis, the primary unknowns are:
Mesh currents
Node voltages
Branch currents
Power dissipations
Total resistance of series resistors 5Ω, 10Ω, 15Ω is:
15Ω
30Ω
25Ω
10Ω
Superposition theorem applies to:
Nonlinear circuits
Circuits with independent sources only
Circuits with dependent sources only
AC circuits only
Thevenin equivalent resistance is found by:
Short-circuiting all sources
Open-circuiting all sources
Turning off all independent sources
Applying KVL to every loop
Time constant (τ) of a first-order RL circuit:
R × C
L × C
L / R
R / L
In a discharging RC circuit, the capacitor voltage:
Increases exponentially
Decreases exponentially
Remains constant
Oscillates sinusoidally
