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1. A
   $\frac{x}{\pi t}$
2. B
   $\frac{\pi^2}{xt}$
3. C
   $\frac{\pi^2 x}{t}$
4. D
   $\frac{\pi x}{t}$

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1. A
   directly proportional to $n^2$
2. B
   inversely proportional to $n^2$
3. C
   directly proportional to $n^3$
4. D
   inversely proportional to $n^3$

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1. A
   $(43.7 \pm 0.2)^\circ\text{C}$
2. B
   $(43.7 \pm 0.3)^\circ\text{C}$
3. C
   $(43.7 \pm 0.1)^\circ\text{C}$
4. D
   $(43.7 \pm 0.5)^\circ\text{C}$

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

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1. A
   10 m
2. B
   3 m
3. C
   6 m
4. D
   9 m

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1. A
   -16
2. B
   -12
3. C
   0
4. D
   +12

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1. A
   Kirchhoff's 1st law in electricity.
2. B
   Lenz's law in induction.
3. C
   Ampere's circuital law.
4. D
   Gauss's law is electrostatics.

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1. A
   (0, 0)
2. B
   (0, 1)
3. C
   (1, 0)
4. D
   (1, 1)

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1. A
   $6:5$
2. B
   $\sqrt{6}:\sqrt{5}$
3. C
   $36:25$
4. D
   $5:6$

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1. A
   (a)
2. B
   (b)
3. C
   (c)
4. D
   (d)

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1. A
   $\tan^{-1}(0.5)$
2. B
   $\tan^{-1}(1)$
3. C
   $\tan^{-1}(1.5)$
4. D
   $\tan^{-1}(2.0)$

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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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