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## Electronic Principles MCQ

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Question 1 |

In an intrinsic semiconductor, the number of free electrons

Equals the number of holes | |

Is less than the number of holes | |

Is greater than the number of holes | |

Impossible to say |

Question 2 |

A device that converts mechanical into electrical energy is?

solar cell | |

thermocouple | |

chemical cell | |

generator |

Question 3 |

Which one of the following kinds of materials has the lowest permeability?

A diamagnetic material | |

A paramagnetic material | |

A feiTomagnetic material | |

All of the above |

Question 4 |

The total impedance of a parallel RLC circuit:

always increases as the applied frequency increases | |

is equal to the sum of the values of resistance, inductive reactance and capacitive reactance | |

always decreases as the applied frequency increases | |

is maximum at the resonant frequency |

Question 5 |

The rise time of a pulse waveform is the time required for the voltage to rise:

from zero to its rms value | |

from zero to its peak value | |

from 10% of the peak value to 70.7% of the peak value | |

from 10% of the peak value to 90% of the peak value |

There are 5 questions to complete.