The electric field of a plane electromagnetic wave varies with time of amplitude `2Vm^-1` propagating along z-axis. The average energy density of the magentic field is (in `Jm^-3`)

The electric field of a plane electromagnetic wave varies with time of amplitude 2Vm^-1 propagating along z-axis. The average energy density of the magnetic field is (in Jm^-3 )

The electric field of a plane electromagnetic wave varies with time of amplitude 2 Vm^(-1) propagating along z - axis. The average energy density of the magnetic field is (in Jm^(-3) )

The electric field of a plane electromagnetic wave varies with time of amplitude 3 V m^(-1) propagating along z-axis. The average energy density of the magnetic field in ("in J m"^(-3))

In a plane electromagnetic wave, the electric field of amplitude 1 V m^(-1) varies with time in free space. The average energy density of magnetic field is (in Jm^(-2) )

In a plane electromagnetic wave, the electric field of amplitude 1 V m^(-1) varies with time in free space. The average energy density of magnetic field is ("in J m"^(-3))

In an electromagnetic wave, the amplitude of electric field is 1 V//m . The frequency of wave is 5xx10^(14)Hz . The wave is propagating along z -axis. The average energy density of electric field, in "joule"//m^(3) ,will be