The thicknes of a glass plate is measured to be 2.17 and 2.17 mm and 2.18 mm at three different places. Find the average thickness of the plate from this data.

The thickness of a glass sheet is measured at six different places and the following readings are obtained : 1.21 mm, 1.24 mm, 1.19 mm, 1.15 mm, 1.22 mm, 1.25 mm. Find the most probable value of the thickness and percentage error in measurement.

If the thickness of the plate in the above problem is 2 mm, find the downward force when plate is placed vertically on water along its longest side.

The plates of a parallel plate capacitor are charged up to 200 V. A dielectric slab of thickness 4 mm is inserted between its plates. Then, to maintain the same potential difference between the plates of the capacitor, the distance between the plates increased by 3.2 mm. The dielectric constant of the dielectric slab is

The plates of a parallel plate capacitor are charged up to 200 V. A dielectric slab of thickness 4 mm is inserted between its plates. Then, to maintain the same potential difference between the plates of the capacitor, the distance between the plates increased by 3.2 mm. The dielectric constant of the dielectric slab is

The plates of parallel plate capacitor are charged upto 100V . A 2mm thick dielectric slab is inserted between the plates.Then to maintain the same potential difference,the distance between the plates is increased by 1.6mm . The dielectric constant of the slab is.

A thin glass plate of thickness t and refractive index mu is between screen &one of the slits in young's experiment.if the intensity at the center of the screen is I ,was the intenstity at the same point prior to the introduction of the sheet. (b) One slit of a young's experiment is covered by a glass plate (mu_(1)=1.4) and the other by another glass plate (mu_(2)=1.7) of the same thickness. The point of central maxima of the screen,before the plates were introduced is now occupied by the third bright fringe.Find the thicknes of the thickness of the plates.the wavelength of light used in 4000Å .

The plates of a parallel plate capacitor are charged upto 100 V. A 2 mm thich insulator sheet is inserted between the plates . Then to maintain the same potential difference the distance between the plates is increased by 1.6 mm. The dielectric constant of the insulator is