Field inside and outside a thick wire, hollow cylinder or coaxial cable (Ampere's law)

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

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

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

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1. A.
   Zero in the region $r < a$ and inversely proportional to $r$ in the region $r > a$
2. B.
   Inversely proportional to $r$ in the region $r < a$ and uniform throughout in the region $r > a$
3. C.
   Directly proportional to $r$ in the region $r < a$ and inversely proportional to $r$ in the region $r > a$
4. D.
   Uniform in the region $r < a$ and inversely proportional to distance $r$ from the axis, in the region $r > a$

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

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1. A.
   Option (A)
2. B.
   Option (B)
3. C.
   Option (C)
4. D.
   Option (D)

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1. A.
   $\lbrack a/4,3a/2\rbrack$
2. B.
   $\lbrack a/2,2a\rbrack$
3. C.
   $\lbrack a/2,3a\rbrack$
4. D.
   $\lbrack a/4,2a\rbrack$

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1. A.
   (D) Only
2. B.
   (A), (D) Only
3. C.
   (B), (C) Only
4. D.
   (E) Only

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