# electronics-alternating-current-and-voltage Related Question Answers

### 1. What is the instantaneous peak voltage at 250° on a 6 V peak sine wave?

### 2. Calculate the positive-going slope of the waveform in the given circuit.

### 3. A rectangular wave that has a duty cycle of 50% could be called a

### 4. Calculate the duty cycle of the repetitive pulse waveform in the given circuit.

### 5. The effective value of a sine wave is equal to

### 7. What is the fourth harmonic of a fundamental frequency of 400 Hz?

### 9. Which point is the trailing edge of the repetitive pulse waveform in the given circuit?

### 10. A single-phase induction motor

### 11. What is the average voltage when a rectangular wave's base line voltage is 20 V, its peak-to-peak voltage is 50 V, and its duty cycle is 20%?

### 12. One revolution of a conductor through the magnetic field of a basic generator will produce two complete sine waves.

### 13. A sine wave's peak-to-peak voltage value is always twice its peak voltage value.

### 17. The instantaneous voltage at 120° on a 5 V peak sine wave equals about –4.33 V.

### 19. The sine of a given angle is equal to the ratio of the hypotenuse to the opposite side.

### 22. If you increase the rotational speed of the conductor in a basic generator, the frequency of the resulting sine wave voltage will increase.

### 24. The frequency of the repetitive pulse waveform in the given circuit equals ___.

### 25. What is ‘Zero Hour’?

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