Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time—called pulsed lasers. They are used to ignite nuclear fusion, for example. Such a laser may produce an electromagnetic wave with a maximum electric field strength of 2.5 x 1011 V/m for a time of 1.00 ns. What is the maximum magnetic field strength in the wave?

The maximum magnetic field strength is 833.33 T

Explanation:

The maximum magnetic field strength is equal:

Where

E = electric field strength = 2.5x10¹¹V/m

c = speed of the light = 3x10⁸m/s

Replacing:

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.