Correct answer
Through the electrical power circuits for those devices.
It supplies electrical energy through the power circuits for those consumers. The radio need not receive energy through the lighting circuit. With the engine running, the generator can supply consumers and recharge the battery. Do not confuse the circuits supplying these devices with the ignition circuit producing the spark in a petrol engine.
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Only through the ignition circuit producing the spark.
Through the electrical power circuits for those devices.
It cannot supply them while the engine is switched off.
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