1Question
Which unit is used to measure electric current?
2Question
Which unit is used to measure electric potential difference?
3Question
Which unit is used to measure electrical resistance?
4Question
In a simple circuit, which component provides the energy source?
5Question
What device is commonly used to open or close a circuit?
6Question
Which material allows electric current to flow easily?
7Question
Which material resists the flow of electric current?
8Question
What is the flow of electric charges called?
9Question
In a circuit diagram, a straight line usually represents what?
10Question
Which of these is a common power source in robotics projects?
11Question
If voltage increases while resistance stays the same, what happens to current?
12Question
If resistance increases while voltage stays the same, what happens to current?
13Question
Which law relates voltage, current, and resistance?
14Question
According to Ohm's law, current equals voltage divided by what?
15Question
A multimeter is used to measure which of the following?
16Question
What component is used to limit current in a circuit?
17Question
Which component changes electrical energy into light?
18Question
Which component changes electrical energy into motion in a robot?
19Question
What does a fuse do in an electrical circuit?
20Question
What is the main purpose of a relay in robotics?
21Question
A circuit with only one path for current is called a __________ circuit.
22Question
A circuit with multiple paths for current is called a __________ circuit.
23Question
In a series circuit, what happens if one component fails?
24Question
In a parallel circuit, what happens if one branch opens?
25Question
Which device is commonly used to vary the speed of a DC motor?
26Question
What does PWM stand for?
27Question
Why is PWM useful in robotics?
28Question
What is the function of a diode in a circuit?
29Question
Why are protection diodes often used with motors?
30Question
Which of the following is most likely to damage a microcontroller input pin?
31Question
A robot uses a 12 V battery and a resistor of 6 ohms. What current flows through the resistor?
32Question
A circuit has 9 V across a 3 ohm resistor. What is the current?
33Question
A motor draws 0.5 A at 6 V. What is its approximate resistance, assuming Ohm's law applies?
34Question
If a 2 ohm resistor carries 4 A, what is the voltage across it?
35Question
Two 4 ohm resistors in series have a total resistance of:
36Question
Two 6 ohm resistors in parallel have an equivalent resistance of:
37Question
Which statement best describes electrical power?
38Question
What is the formula for electrical power?
39Question
A robot motor uses 5 V and 2 A. What is the electrical power?
40Question
If a device uses 24 W at 12 V, how much current does it draw?
41Question
Why is wire gauge important in robot wiring?
42Question
What is a common reason for voltage drop in robot wiring?
43Question
Why should motors and logic circuits sometimes use separate power lines?
44Question
What is electrical noise in a robotics system most likely to affect?
45Question
Which component is best for storing electrical energy temporarily?
46Question
In robotics, what is one use of a capacitor near a motor or microcontroller?
47Question
What does grounding in a robot circuit help ensure?
48Question
Why is current limiting important when connecting an LED to a microcontroller?
49Question
A robot system has three 5 ohm resistors in parallel. What is the equivalent resistance?
50Question
Which practice is best for safely testing electrical circuits in a classroom robotics lab?