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Difficulty: EasyInductors and Transformers

In electronics, inductors and transformers rely on magnetic fields to store energy, filter signals, and modify alternating current voltages. Match each component term to its correct definition or operational characteristic.

  • Henry (H)The standard unit of electrical inductance in a coil
  • Ferrite CoreA magnetic ceramic material used in high-frequency coils to minimize energy losses
  • Step-up TransformerA device with more secondary turns than primary turns that increases output AC voltage
  • Inductive ReactanceThe opposition an inductor offers to the flow of alternating current, measured in ohms

Answer

Henry (H) matches the standard unit of electrical inductance in a coil; Ferrite Core matches a magnetic ceramic material used in high-frequency coils to minimize energy losses; Step-up Transformer matches a device with more secondary turns than primary turns that increases output AC voltage; Inductive Reactance matches the opposition an inductor offers to the flow of alternating current, measured in ohms.
Each concept accurately pairs with its standard electronic definition: Henry (H) is the unit of inductance; Ferrite Core is the high-frequency ceramic magnetic material; Step-up Transformer increases output AC voltage via greater secondary turns; and Inductive Reactance is the coil's opposition to AC current measured in ohms.

Step-by-Step Solution

1
Identify the standard unit of measurement for inductance
The Henry (H) is the standard unit of inductance.
Inductance measures a coil's ability to induce back-EMF opposing current changes, measured in henries.
2
Identify the specialized core material used for high frequencies
Ferrite core matches the ceramic magnetic material.
Ferrite reduces eddy current losses at radio and high frequencies due to its high electrical resistivity.
3
Identify the transformer type that raises alternating voltage
A step-up transformer increases output voltage.
By the turns ratio principle, having more secondary turns than primary turns increases secondary AC voltage.
4
Identify the property representing opposition to AC current in ohms
Inductive reactance represents AC opposition in ohms.
Inductive reactance (XL=2πfLX_L = 2\pi f L) quantifies how much an inductor restricts alternating current at a given frequency.

Key Concept

Basic terminology, units, materials, and operating principles of inductors and transformers.

Alternative Method

Recall standard electronic abbreviations and formulas: LL is measured in Henries (H), XLX_L is measured in Ohms (Ω\Omega), and Ns>NpN_s > N_p signifies a step-up voltage transformer.
Estimated Time:45s
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Topics

Inductors and Transformers

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