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The device used for locating submerged objects under sea is.
The device used for measuring the wavelength of X-rays is
The device used to change the speed of an electric fan is
The device used to convert solar energy into electricity is
The device which converts AC to DC is
The device which converts sound energy into electrical energy is called
The device which transfer the signal from low resistance region to high resistance region is
The dielectric strength of transformer oil should be of the order of
The dimension MLT-2 corresponds to
The dimensional formula for universal gravitational constant is
