A mod-n counter using a synchronous binary up-counter with synchronous clear input is shown in the figure. The value of n is _______.

The figure shows a binary counter with synchronous clear input. With the decoding logic shown, the counter works as a

In a source free region in vacuum, if the electrostatic potential $$\varphi\;=\;2x^2\;+y^2+cz^2$$ , the value of constant c must be ________________.

The electric field of a uniform plane electromagnetic wave is $$$\vec E = \left( {{{\overrightarrow a }_x} + j4{{\overrightarrow a }_y}} \right)\exp \left[ {j\left( {2\pi \times {{10}^7}t - 0.2z} \right)} \right]$$$

The polarization of the wave is