A loop with 10 turns and radius of 0.4 m is placed perpendicularly in a uniform magnetic field. A 40 V electromotive force is induced in the loop. After 10 s the radius of the loop is decreased to 0.2 m. Calculate the (a) initial area of the loop.
(b)new area of the loop when it is decreased.
(c) magnitude of the magnetic field.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.

When using the scientist method, which step comes last?

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume