Magnetic moment of a coil (NIA) compared between coils or after rewinding

1. A.
   $2N_A I_A = N_B I_B$
2. B.
   $N_A = 2N_B$
3. C.
   $N_A I_A = 4N_B I_B$
4. D.
   $4N_A I_A = N_B I_B$

Tap an option to check your answer.

1. A.
   3
2. B.
   2
3. C.
   $\frac{1}{3}$
4. D.
   $\frac{1}{2}$

Tap an option to check your answer.

1. A.
   $n$ only
2. B.
   $I$ only
3. C.
   $r$ only
4. D.
   $n$, $I$ and $r$

Tap an option to check your answer.

1. A.
   3:1
2. B.
   1:3
3. C.
   9:1
4. D.
   1:9

Tap an option to check your answer.

1. A.
   $2 : 1$
2. B.
   $4 : 1$
3. C.
   $1 : 2$
4. D.
   $1 : 4$

Tap an option to check your answer.

1. A.
   $2N_aI_a = N_bI_b$
2. B.
   $N_a = 2N_b$
3. C.
   $N_aI_a = 4N_bI_b$
4. D.
   $4N_aI_a = N_bI_b$

Tap an option to check your answer.

1. A.
   $2 : 1$
2. B.
   $1 : 1$
3. C.
   $1 : 2$
4. D.
   $4 : 1$

Tap an option to check your answer.