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Q. The length of a string is 504 cm. It is held fixed at each end. The string vibrates in seven sections; i.e., the string has seven antinodes,and the string vibrates at 120 Hz.

Find the wavelength. Answer in units of m.

Q. A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm. To obtain an electric field of 2× 10^6 V/m between the plates, the magnitude of the charge on each plate should be:

What is the charge (in ) on positive electrode?

What is the charge (in ) on negative electrode?

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