The main comparison to stranded conductors concerns:

The main comparison to stranded conductors concerns:

• A. Thermal conductivity
• B. Electrical resistance per unit length
• C. Flexibility and termination practicality
• D. Magnetic permeability

Answer: (C)

The key thing being compared is how the conductor behaves in real-world installation. Stranded conductors are made of many small strands, which makes them far more flexible than a solid conductor of the same overall cross-section. That flexibility is the main practical advantage: it lets the wire bend around corners, route through tight spaces, and absorb vibration without kinking or fatigue. Because of this, stranded wire is typically chosen where movement or bending is common and where a reliable, easy-to-route connection matters. Termination practicality is the related consideration you’ll encounter in connectors and terminals. Strands can splay or compress unless the connection is designed for it, so you often use ferrules or crimp-on lugs to keep the strands together and ensure a solid, reliable termination. Solid conductors don’t have this same requirement, but they’re less forgiving in tight bends and vibration. Other properties—like how well heat is conducted, the resistance per unit length, or magnetic permeability—don’t differ enough between stranded and solid copper to drive the choice in everyday wiring. The material is the same; the practical differences come from flexibility and how you terminate the wire.

The key thing being compared is how the conductor behaves in real-world installation. Stranded conductors are made of many small strands, which makes them far more flexible than a solid conductor of the same overall cross-section. That flexibility is the main practical advantage: it lets the wire bend around corners, route through tight spaces, and absorb vibration without kinking or fatigue. Because of this, stranded wire is typically chosen where movement or bending is common and where a reliable, easy-to-route connection matters.

Termination practicality is the related consideration you’ll encounter in connectors and terminals. Strands can splay or compress unless the connection is designed for it, so you often use ferrules or crimp-on lugs to keep the strands together and ensure a solid, reliable termination. Solid conductors don’t have this same requirement, but they’re less forgiving in tight bends and vibration.

Other properties—like how well heat is conducted, the resistance per unit length, or magnetic permeability—don’t differ enough between stranded and solid copper to drive the choice in everyday wiring. The material is the same; the practical differences come from flexibility and how you terminate the wire.