A) Solenoid A has total number of turns N, length L and diameter D

A) Solenoid A has total number of turns N, length L and diameter D. Solenoid B has total number of turns 2N, length 2L and diameter 2D. Inductance of solenoid A is

Group of answer choices

1/8 of inductance of solenoid B

same as inductance of solenoid B

1/4 of inductance of solenoid B

8 times inductance of solenoid B

four times of inductance of solenoid B

B )A solenoid has radius of cross-sectional area R and the size of this area is A. Coil#1 with cross-sectional area 2A is coiled around the solenoid. Coil #2 (with the same # of turns as coil #1) and cross-sectional area A/3 is placed inside of the solenoid, so that turns of the coil and solenoid are parallel to each other. Coil #1 has mutual inductance with solenoid which is

Group of answer choices

same mutual inductance as coil #2 with solenoid

6 times of mutual inductance of coil #2 with solenoid

3 times of mutual inductance of coil #2 with solenoid

1/6 of mutual inductance of coil #2 with solenoid

1/9 of mutual inductance of coil #2 with solenoid

9 times of mutual inductance of coil #2 with solenoid

1/3 of mutual inductance of coil #2 with solenoid)