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Basic Electrical Principles Flashcards

7 cards from real EIAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Basic Electrical Principles flashcards as text

  1. What does a diode primarily do in an electrical circuit?

    Answer: Allows current to flow in only one direction

    A diode is a semiconductor device that permits current to flow in one direction only, acting as a one-way valve.

  2. What is the relationship between voltage (V), current (I), and resistance (R) in Ohm's Law?

    Answer: V = I × R

    Ohm's Law states that voltage equals current multiplied by resistance: V = I × R.

  3. Which component is used to protect a circuit from excess current by breaking the circuit?

    Answer: Fuse

    A fuse contains a metal element that melts and breaks the circuit when current exceeds a safe level.

  4. What is the voltage across a 15-ohm resistor carrying 3 amperes of current?

    Answer: 45 V

    Using Ohm's Law: V = I × R = 3 × 15 = 45 V.

  5. In electrical terms, what is 'grounding' primarily intended to do?

    Answer: Provide a safe path for fault current to prevent shock

    Grounding provides a low-resistance path for fault current to flow safely to earth, protecting people from electric shock.

  6. What type of device converts AC voltage from one level to another?

    Answer: Transformer

    A transformer uses electromagnetic induction to step AC voltage up or down between two or more coils.

  7. Which material is classified as a semiconductor?

    Answer: Silicon

    Silicon is the most widely used semiconductor material because its conductivity can be precisely controlled by doping.