The frequency of an alternating current is 3 Hz. It implies that

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Q: 14 (NDA-I/2022)
The frequency of an alternating current is 3 Hz. It implies that

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,33,28,21,33,4,3

keywords: 

{'frequency': [0, 0, 1, 3], 'cycles': [0, 0, 0, 1], 'hz': [0, 0, 4, 8], 'cycle': [0, 2, 5, 2], 'current': [0, 0, 0, 3]}

The frequency of an alternating current refers to the number of complete cycles of the current that occur in one second. In this case, the frequency is stated to be 3 Hz. Hertz (Hz) is the unit used to measure frequency, and it represents the number of cycles per second.

Option 1 states that there are 6 cycles per second. This is incorrect because the given frequency is 3 Hz, not 6 Hz.

Option 2 states that there are 3 cycles per second. This is the correct answer. The frequency of 3 Hz means that there are 3 complete cycles of the current that occur in one second.

Option 3 states that there are 2 cycles per second. This is incorrect because the given frequency is stated to be 3 Hz, not 2 Hz.

Option 4 states that there is only 1 cycle per second. This is incorrect because the given frequency is stated to be 3 Hz, not 1 Hz.

Therefore, the correct answer is option 2: there are 3 cycles per second.