If the power supply has an effective impedance of 100 (the load impedance that the transformer sees), what impedance does the primary of the transformer see?

Three resistances 2 ohm, 3ohm and 5 ohm are connected in parallel and a potential difference of 20V is applied across the terminals of combination. The potential difference across 3 ohm resistance is:

Which two properties of light relate to the amount of energy carried by the light? A. speed and amplitude B. frequency and period C. color and wavelength D. frequency and amplitude

What force would cause a mass of 3KG to accelerate 2m/s2

An object that does not allow light to pass through it is

The emissivity of an ideal reflector has which of the following values? a. 0 b. 1 c. 100 d. infinity

A 15 kg child experiences an acceleration of 0.25 m/s2 as she is pulled 1.7 m horizontally across the floor by her sister. what is the change in the child's kinetic energy?

A piece of candy has 5 calories (or 5000 calories). if it could be burned, leaving nothing but carbon dioxide and water, how much heat would it give off?

The orientation in space of the electron is described by which quantum number?

Which statement best defines why sound waves are mechanical waves? A. They require a medium in which to travel B. They can travel through a vaccum C. They can travel only through solids D. They can travel through gases

Consider the uniform electric field E = (2.5 j + 3.5 k) * 103 N/C. (a) Calculate the electric flux through a circular area of radius 2.5 m that lies in the yz-plane. Give your answer in N·m2/C.