Question

Can someone help with these/

Answer 1

Three

Right Hand Rule

The index finger points in the direction of v

The electric field is designated by the the thumb

The middle finger is B

Paint these directions on your fingers (and thumb).

Using your right hand, B is point out of the page. Your fingers are mutually perpendicular.

Which ever answer says out of the page, is the answer. B

Four

Many critters like dogs are color blind. Those poor unfortunates see only gray. We have a wider range. Our eyes do see color (visible light) but we are not limited. The correct answer is B. We can make devices that respond to visible light like lasers so in effect they are "seeing" visible light. The answer is B.