The question asks to identify the term for the back and forth motion of an object. We need to understand the definitions of the given options to determine the correct answer.
The question asks to identify which of the given options, in addition to fingerprint scanning, can be used for biometric identification of a person. Biometric identification relies on unique physiological or behavioral characteristics of individuals.
Correct Option: D) 1, 2 and 3
The question asks for the term that defines the number of oscillations per second. This is a fundamental definition in physics related to wave phenomena and periodic motion. We need to recall the definitions of the given options to identify the correct term.
C) Frequency — Frequency is defined as the number of complete cycles or oscillations that occur in one second. It is the reciprocal of the time period (\(f = 1/T\)).
The question asks for the unit in which frequency is expressed. This is a fundamental concept in physics, specifically related to waves and oscillations. We need to identify the standard SI unit for frequency.
D) Hertz is the correct SI unit for frequency. It represents one cycle per second.
The question asks to identify the correct statements about sound. We need to evaluate each statement individually based on fundamental principles of sound propagation.
C) All the above. Since all four statements (i), (ii), (iii), and (iv) are correct, option C is the right answer.
| List I - Musical Instruments | List II - Vibrating Parts |
| a) Veena | 1.) Stretched Membrane |
| b) Tabla | 2.) Stretched Strings |
| c) Flute | 3.) Whole Body |
| d) Manjira | 4.) Air Column |
The question asks to match musical instruments with their vibrating parts responsible for producing sound. We need to identify the primary sound-producing mechanism for each instrument listed.
This corresponds to option A.
Correct Option: A) a-2, b-1, c-4, d-3