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1. A
   $\frac{\rho}{\rho - \sigma}$
2. B
   $\frac{h\sigma}{(\rho - \sigma)}$
3. C
   $\frac{\sigma}{(\rho - \sigma)}$
4. D
   $\frac{h\sigma}{(\rho - \sigma)}$

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

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1. A
   256 Hz
2. B
   262 Hz
3. C
   320 Hz
4. D
   384 Hz

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1. A
   $7 \times 10^2$ Wb
2. B
   $70 \times 10^2$ Wb
3. C
   $3.5 \times 10^2$ Wb
4. D
   $35 \times 10^3$ Wb

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1. A
   $E^2\sin^2\theta$
2. B
   $E\sin\theta$
3. C
   $E\cos^2\theta$
4. D
   $E\cos\theta$

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

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1. A
   $B = \frac{\mu_0}{(H+M)}$
2. B
   $B = \mu_0(H-M)$
3. C
   $B = \frac{\mu_0}{(H-M)}$
4. D
   $B = \mu_0(H+M)$

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1. A
   8 m/s
2. B
   6 m/s
3. C
   4 m/s
4. D
   2 m/s

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1. A
   $\frac{\lambda}{4.5}$
2. B
   $\frac{\lambda}{3}$
3. C
   $\frac{\lambda}{2}$
4. D
   $\lambda$

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1. A
   16 rad/s
2. B
   4 rad/s
3. C
   2 rad/s
4. D
   8 rad/s

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1. A
   15 cm/s
2. B
   21 cm/s
3. C
   27 cm/s
4. D
   36 cm/s

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1. A
   0.12 m
2. B
   0.14 m
3. C
   0.21 m
4. D
   0.28 m

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1. A
   0.5 s
2. B
   0.4 s
3. C
   0.8 s
4. D
   0.7 s

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1. A
   $\frac{qBh}{\pi m}$
2. B
   $\frac{q^2B^2h^2}{4\pi m}$
3. C
   $\frac{qBh}{2\pi m}$
4. D
   $\frac{2qBh}{\pi m}$

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1. A
   7 kcal
2. B
   12 kcal
3. C
   15 kcal
4. D
   22 kcal

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1. A
   2000 Å
2. B
   4000 Å
3. C
   5000 Å
4. D
   10000 Å

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1. A
   second
2. B
   volt
3. C
   ampere
4. D
   per second

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1. A
   $\frac{E_0^2}{4R}$
2. B
   $\frac{E_0^2}{6R}$
3. C
   $\frac{E_0^2}{8R}$
4. D
   $\frac{E_0^2}{12R}$

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1. A
   $\frac{Eqm}{2t}$
2. B
   $\frac{E^2q^2t^2}{2m}$
3. C
   $\frac{2E^2t^2}{mq^2}$
4. D
   $\frac{Eqt}{m}$

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1. A
   3 $\Omega$
2. B
   4 $\Omega$
3. C
   5 $\Omega$
4. D
   6 $\Omega$

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

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1. A
   $\frac{C}{(K-1)}$
2. B
   $\frac{KC}{K-1}$
3. C
   $KC+1$
4. D
   $C(K-1)$

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1. A
   $\frac{2V}{RT}(P-P')$
2. B
   $\frac{V}{RT}(P-P')$
3. C
   $\frac{V}{RT}(P+P')$
4. D
   $\frac{V}{2RT}(P+P')$

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1. A
   mass of the earth.
2. B
   mass of the object to be projected.
3. C
   radius of the earth.
4. D
   gravitational constant.

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1. A
   the potential is same everywhere.
2. B
   there is an electric field at the junction directed from the p-type side to the n-type side.
3. C
   there is an electric field at the junction directed from the n-type side to the p-type side.
4. D
   the p-type side is at higher potential than the n-type side.

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