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100+ Free ETA CETa Practice Questions
Associate Certified Electronics Technician (CETa) practice questions are available now; exam metadata is being verified.
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Sample ETA CETa Practice Questions
Try these sample questions to test your ETA CETa exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A 12 V source is connected across a 4 ohm resistor. How much current flows in the circuit?
A.3 A
B.48 A
C.0.33 A
D.16 A
Explanation: By Ohm's law, I = V/R = 12 V / 4 ohm = 3 A. Current equals voltage divided by resistance.
2What is the total resistance of three resistors of 10 ohm, 20 ohm, and 30 ohm connected in series?
A.5.45 ohm
B.60 ohm
C.20 ohm
D.600 ohm
Explanation: Series resistances add directly: R = 10 + 20 + 30 = 60 ohm. Total resistance in series is always greater than the largest individual resistor.
3Two 100 ohm resistors are connected in parallel. What is the total resistance?
A.200 ohm
B.100 ohm
C.50 ohm
D.0.02 ohm
Explanation: For two equal resistors in parallel, R = R/N = 100/2 = 50 ohm. Equivalently, (100 x 100)/(100 + 100) = 10000/200 = 50 ohm.
4A circuit draws 2 A from a 24 V supply. How much power is dissipated?
A.12 W
B.0.083 W
C.26 W
D.48 W
Explanation: Power P = V x I = 24 V x 2 A = 48 W. This is the basic power formula for DC circuits.
5What current flows through a 1 kohm resistor that dissipates 4 W?
A.63 mA
B.4 mA
C.2 A
D.0.25 mA
Explanation: Using P = I^2 x R, I = sqrt(P/R) = sqrt(4/1000) = sqrt(0.004) = 0.063 A = 63 mA. Power and resistance determine current when voltage is unknown.
6In a series circuit, what quantity is the same through every component?
A.Voltage
B.Current
C.Power
D.Resistance
Explanation: In a series circuit there is only one path, so the same current flows through every component. Voltage divides among the components in proportion to their resistances.
7What quantity is identical across all branches of a parallel circuit?
A.Current
B.Power
C.Voltage
D.Resistance
Explanation: Components in parallel are connected across the same two nodes, so each branch sees the same voltage. Current divides among the branches according to each branch's resistance.
8A 6 V and a 9 V battery are connected in series aiding. What is the total voltage?
A.3 V
B.54 V
C.7.5 V
D.15 V
Explanation: Series-aiding sources add: 6 V + 9 V = 15 V. The total voltage equals the sum of the individual EMFs when polarities aid each other.
9According to Kirchhoff's Voltage Law, the sum of voltage drops around a closed loop equals what?
A.Zero net sum with the source voltage
B.Twice the source voltage
C.The largest single drop
D.The total current
Explanation: Kirchhoff's Voltage Law states that the algebraic sum of all voltages around a closed loop is zero, meaning the sum of the drops equals the applied source voltage.
10A 100 ohm and a 200 ohm resistor are in series across a 30 V source. What is the voltage drop across the 200 ohm resistor?
A.10 V
B.20 V
C.30 V
D.15 V
Explanation: Total R = 300 ohm, so I = 30/300 = 0.1 A. The drop across 200 ohm = 0.1 A x 200 ohm = 20 V, consistent with the voltage divider ratio 200/300 x 30 V.
About the ETA CETa Practice Questions
Verified exam format metadata for Associate Certified Electronics Technician (CETa) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.