7. A step-down transformer has a turn ratio Np/Ns of 4:1. If the primary voltage Vp is 120 V(rms), the secondary voltage Vs is (a) 480 V (b) 120 V (c)30 V (d) It cannot be determined.

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.