G7A12
PRACTICAL CIRCUITS · - Power supplies; schematic symbols
G7A12G7A →
Which symbol in Figure G7-1 represents a solid core transformer?
- ASymbol 4
- BSymbol 7
- CSymbol 6
- DSymbol 1
Why A transformer is drawn as two coils (windings) facing each other, and the core is shown by the lines drawn between them. Solid parallel lines between the windings mean a solid (iron or laminated) core, which is what Symbol 6 shows; if those lines were absent, the same two coils would be an air core transformer. The two windings indicate magnetic coupling between separate primary and secondary circuits.
Watch out The symbols showing only a single coil, including the one with a tap on it, are inductors rather than transformers, since there is no second winding to couple energy into.
Two coils = transformer; lines between them = core. No lines, air core.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
The rest of G7A
- G7A01 What is the function of a power supply bleeder resistor?
- G7A02 Which of the following components are used in a power supply filter network?
- G7A03 Which type of rectifier circuit uses two diodes and a center-tapped transformer?
- G7A04 What is characteristic of a half-wave rectifier in a power supply?
- G7A05 What portion of the AC cycle is converted to DC by a half-wave rectifier?
- G7A06 What portion of the AC cycle is converted to DC by a full-wave rectifier?
- G7A07 What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?
- G7A08 Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?
- G7A09 Which symbol in figure G7-1 represents a field effect transistor?
- G7A10 Which symbol in figure G7-1 represents a Zener diode?
- G7A11 Which symbol in figure G7-1 represents an NPN junction transistor?
- G7A12 Which symbol in Figure G7-1 represents a solid core transformer?
- G7A13 Which symbol in Figure G7-1 represents a tapped inductor?