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1. A
   0.2 A
2. B
   0.02 A
3. C
   0.01 A
4. D
   2 A

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1. A
   $\frac{V}{6}$
2. B
   $\frac{3V}{2}$
3. C
   $3V$
4. D
   $6V$

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1. A
   $d_1:d_2$
2. B
   $d_2:d_1$
3. C
   $1:d_1d_2$
4. D
   $1:d_1^2d_2$

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

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1. A
   $\frac{a\pm b}{ab}$
2. B
   $\frac{a\pm b}{ab}$
3. C
   $\frac{a\pm b}{ab}$
4. D
   $\frac{a+b}{ab}$

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1. A
   $\frac{U_1-U_2}{x}$
2. B
   $\frac{v_1-v_2}{x-1}$
3. C
   $\frac{xv_1-v_2}{x-1}$
4. D
   $\frac{xv_2-v_1}{x}$

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1. A
   high retentivity & high coercivity
2. B
   low retentivity & low coercivity
3. C
   high retentivity & low coercivity
4. D
   low retentivity & high coercivity

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1. A
   $n_h < n_e$
2. B
   $n_h = n_e$
3. C
   $n_h = \frac{n_e}{2}$
4. D
   $n_h > n_e$

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1. A
   directly proportional to current flowing through the coil.
2. B
   directly proportional to the length.
3. C
   directly proportional to its area of cross-section.
4. D
   inversely proportional to the area of cross-section.

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1. A
   increase in brightness.
2. B
   decrease in brightness
3. C
   increase, reach a maximum and then decrease in brightness
4. D
   show no change in brightness.

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

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1. A
   $n=n_1+n_2+n_3$
2. B
   $n=\sqrt{n_1+n_2+n_3}$
3. C
   $\frac{1}{n}=\frac{1}{n_1}+\frac{1}{n_2}+\frac{1}{n_3}$
4. D
   $\frac{1}{\sqrt{n}}=\frac{1}{\sqrt{n_1}}+\frac{1}{\sqrt{n_2}}+\frac{1}{\sqrt{n_3}}$

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1. A
   $\sin^{-1}\left(\frac{3}{4}\right)$
2. B
   $\sin^{-1}\left(\frac{2}{3}\right)$
3. C
   $\sin^{-1}\left(\frac{1}{2}\right)$
4. D
   $\sin^{-1}\left(\frac{1}{4}\right)$

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1. A
   The intensity and width of the central maximum are unaffected.
2. B
   The intensity remains same and angular width becomes half.
3. C
   The intensity and angular width both are doubled.
4. D
   The intensity increases by a factor 4 and the angular width decreases by a factor of 1/2

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1. A
   $\frac{U_0}{K}$
2. B
   $\frac{U_0}{K^2}$
3. C
   $U_0 K^2$
4. D
   $\frac{U_0}{2}$

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1. A
   200 W
2. B
   0 W
3. C
   40 W
4. D
   1000 W

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1. A
   2l cm from left end.
2. B
   l cm from left end.
3. C
   l/2 cm from left end
4. D
   l/4 cm from left end

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1. A
   is a constant.
2. B
   decreases with time.
3. C
   increases with time.
4. D
   first increases and then decreases, finally having same value as at the beginning.

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

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1. A
   Iron
2. B
   vanadium pentaoxide
3. C
   Nickel
4. D
   Cobalt

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1. A
   Se
2. B
   Br
3. C
   Xe
4. D
   Kr

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1. A
   52.4%
2. B
   68.0%
3. C
   32.0%
4. D
   74.0%

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1. A
   PVC
2. B
   Polyisobutylene
3. C
   Polyacrylonitrile
4. D
   Teflon

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1. A
   $SO_2$
2. B
   $SF_6$
3. C
   $NH_3$
4. D
   $SF_4$

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1. A
   $-k$
2. B
   $k$
3. C
   $\frac{k}{2.303}$
4. D
   $\frac{-k}{2.303}$

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