ATT_TKT_II_2026_2027_250_Questions_Guide

AT&T; TKT II (Latest 2026/2027 Update)
Complete 250-Question Practice Guide with Answers • Graded A+
Study Format
Important: This is an independently prepared study guide based on publicly surfaced 2025/2026 TKT II-style material and technical domains.
It is not an official AT&T; examination paper, and no claim is made that any question will appear verbatim on a future exam. Questions are
newly written except for brief concepts visible in public previews, which were used only to identify recurring topics.




Format: answer choices use dots rather than A/B/C/D labels. The correct choice is marked by a green tick inside an empty box in place of the dot.




Questions begin immediately below.
Basic Electricity
1. A circuit has 30 V across a resistor carrying 2 A. What is the resistance?
■ 15 Ω
• 30 Ω
• 7.5 Ω
• 32 Ω
Answer: 15 Ω — Use Ohm's law R = V/I.

2. A circuit has 48 V across a resistor carrying 3 A. What is the resistance?
■ 16 Ω
• 32 Ω
•8Ω
• 51 Ω
Answer: 16 Ω — Use Ohm's law R = V/I.

3. A circuit has 120 V across a resistor carrying 10 A. What is the resistance?
■ 12 Ω
• 24 Ω
•6Ω
• 130 Ω
Answer: 12 Ω — Use Ohm's law R = V/I.



AT&T TKT II 2026/2027 Study Guide • 250 Questions Page 1

, 4. A circuit has 24 V across a resistor carrying 4 A. What is the resistance?
■6Ω
• 12 Ω
•3Ω
• 28 Ω
Answer: 6 Ω — Use Ohm's law R = V/I.

5. A circuit has 9 V across a resistor carrying 3 A. What is the resistance?
■3Ω
•6Ω
• 1.5 Ω
• 12 Ω
Answer: 3 Ω — Use Ohm's law R = V/I.

6. A circuit has 50 V across a resistor carrying 5 A. What is the resistance?
■ 10 Ω
• 20 Ω
•5Ω
• 55 Ω
Answer: 10 Ω — Use Ohm's law R = V/I.

7. A circuit has 70 V across a resistor carrying 2 A. What is the resistance?
■ 35 Ω
• 70 Ω
• 17.5 Ω
• 72 Ω
Answer: 35 Ω — Use Ohm's law R = V/I.

8. A circuit has 12 V across a resistor carrying 6 A. What is the resistance?
■2Ω
•4Ω
•1Ω
• 18 Ω
Answer: 2 Ω — Use Ohm's law R = V/I.

9. A circuit has 36 V across a resistor carrying 3 A. What is the resistance?
■ 12 Ω
• 24 Ω
•6Ω
• 39 Ω
Answer: 12 Ω — Use Ohm's law R = V/I.

10. A circuit has 240 V across a resistor carrying 12 A. What is the resistance?
■ 20 Ω
• 40 Ω
• 10 Ω
• 252 Ω
Answer: 20 Ω — Use Ohm's law R = V/I.

11. A resistor of 10 Ω carries 2 A. What voltage is across it?
■ 20 V
• 12 V
• 10 V
• 40 V
Answer: 20 V — Use V = IR.

12. A resistor of 15 Ω carries 2 A. What voltage is across it?
■ 30 V
• 17 V
• 15 V
• 60 V
Answer: 30 V — Use V = IR.



AT&T TKT II 2026/2027 Study Guide • 250 Questions Page 2

, 13. A resistor of 4 Ω carries 3 A. What voltage is across it?
■ 12 V
•7V
•6V
• 24 V
Answer: 12 V — Use V = IR.

14. A resistor of 25 Ω carries 2 A. What voltage is across it?
■ 50 V
• 27 V
• 25 V
• 100 V
Answer: 50 V — Use V = IR.

15. A resistor of 6 Ω carries 5 A. What voltage is across it?
■ 30 V
• 11 V
• 15 V
• 60 V
Answer: 30 V — Use V = IR.

16. A resistor of 8 Ω carries 4 A. What voltage is across it?
■ 32 V
• 12 V
• 16 V
• 64 V
Answer: 32 V — Use V = IR.

17. A resistor of 20 Ω carries 3 A. What voltage is across it?
■ 60 V
• 23 V
• 30 V
• 120 V
Answer: 60 V — Use V = IR.

18. A resistor of 12 Ω carries 2 A. What voltage is across it?
■ 24 V
• 14 V
• 12 V
• 48 V
Answer: 24 V — Use V = IR.

19. A resistor of 50 Ω carries 1 A. What voltage is across it?
■ 50 V
• 51 V
• 25 V
• 100 V
Answer: 50 V — Use V = IR.

20. A resistor of 5 Ω carries 6 A. What voltage is across it?
■ 30 V
• 11 V
• 15 V
• 60 V
Answer: 30 V — Use V = IR.

21. What current flows from a 24 V source through a 6 Ω resistor?
■4A
•8A
• 0.25 A
• 30 A
Answer: 4 A — Use I = V/R.



AT&T TKT II 2026/2027 Study Guide • 250 Questions Page 3