What is component 4 in figure T-1?

Q: What is component 4 in figure T-1?

The correct answer is D: Battery. The correct answer is Battery. Based on the schematic diagram in figure T-1, component 4 is a battery, identified by its standard schematic symbol showing a series of alternating long and short parallel lines. The long line represents the positive terminal, and the short line represents the negative terminal. Batteries are power sources that provide DC voltage to circuits. For amateur radio operators, being able to identify batteries in schematics is essential for understanding power supply circuits, portable equipment operation, and emergency power systems. Battery symbols are commonly found in schematics for handheld transceivers, portable equipment, and backup power circuits.

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Deep Dive: T6C05

The correct answer is Battery. Based on the schematic diagram in figure T-1, component 4 is a battery, identified by its standard schematic symbol showing a series of alternating long and short parallel lines. The long line represents the positive terminal, and the short line represents the negative terminal. Batteries are power sources that provide DC voltage to circuits. For amateur radio operators, being able to identify batteries in schematics is essential for understanding power supply circuits, portable equipment operation, and emergency power systems. Battery symbols are commonly found in schematics for handheld transceivers, portable equipment, and backup power circuits.

Why Other Answers Are Wrong

Option A (Resistor): Incorrect. Resistors are shown as zigzag lines or rectangles. Component 4 shows the battery symbol (alternating long/short lines), not a resistor. Option B (Transistor): Incorrect. Transistors have three terminals. Component 4 shows the battery symbol with two terminals (positive and negative). Option C (Ground symbol): Incorrect. Ground symbols are horizontal lines with vertical lines beneath. Component 4 shows the battery symbol with alternating parallel lines.

Exam Tip

Batteries are shown as alternating long and short parallel lines. The long line is positive (+), short line is negative (-). If you see this symbol, it's a battery. Different from resistors (zigzag) or transistors (three terminals).

Memory Aid

Battery = long and short parallel lines. Think 'B'attery = 'B'ars (long and short lines). Long = positive, short = negative.

Real-World Example

In a handheld transceiver schematic, component 4 might be the battery symbol showing the power source. This battery provides DC voltage to all the circuit stages. Understanding this helps you trace power flow through the circuit and troubleshoot power-related issues.

Source & Coverage

Question Pool: 2026-2030 Question Pool

Subelement: T6C

Reference: 2026-2030 Question Pool · T6 - Electrical components

Key Concepts

Battery identification Power sources Schematic symbols DC power

Official Pool Source

Question text and answer key are synchronized with the current NCVEC Technician Class pool and mapped to the T6C topic.