1. A
   $n_A = n_B$
2. B
   $n_A = 2n_B$
3. C
   $n_A = \dfrac{1}{4}n_B$
4. D
   $n_A = \dfrac{1}{2}n_B$

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

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1. A
   $\dfrac{5}{9}$
2. B
   $\dfrac{9}{5}$
3. C
   1
4. D
   $\dfrac{3}{5}$

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1. A
   $\mu_0\pi n^2 r^2 l$
2. B
   $\mu_0 n^2 r^2 l$
3. C
   $(\mu_0/2\pi)n^2 r^2 l$
4. D
   $2\mu_0\pi n^2 r^2 l$

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1. A
   12
2. B
   6
3. C
   3
4. D
   0

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1. A
   3726
2. B
   3730
3. C
   3736
4. D
   3740

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1. A
   I decreases linearly with t; $|V|$ remains constant with t
2. B
   I decreases linearly with t; $|V|$ decreases linearly with t
3. C
   I remains constant with t; $|V|$ decreases linearly with t
4. D
   I remains constant with t; $|V|$ remains constant with t

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1. A
   2/3
2. B
   1/3
3. C
   1/2
4. D
   1/6

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1. A
   100
2. B
   200
3. C
   300
4. D
   400

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1. A
   $\dfrac{\mu_0 I_0}{12r}$
2. B
   $\dfrac{\mu_0 I_0}{4r}$
3. C
   $\dfrac{\mu_0 I_0}{2r}$
4. D
   $\dfrac{\mu_0 I_0}{2\pi r}$

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1. A
   Line with positive slope crossing the $\sigma/\rho$ axis at 1 (v = 0 at $\sigma/\rho = 1$, rising for $\sigma/\rho > 1$); no dotted extension below axis
2. B
   Line with positive slope, dotted extension passing through origin, v positive at $\sigma/\rho = 0$
3. C
   Line with positive slope, dotted extension below axis, meeting axis at $\sigma/\rho = 1$
4. D
   Horizontal line (v constant) for $\sigma/\rho > 1$

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

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1. A
   $R^{1/2}$
2. B
   $R^{3/2}$
3. C
   $R^2$
4. D
   $R^3$

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1. A
   $\dfrac{\mu_0 I^2}{2\pi\lambda g}$
2. B
   $\dfrac{\mu_0 I^2}{\pi\lambda g}$
3. C
   $\dfrac{2\mu_0 I^2}{\pi\lambda g}$
4. D
   $\dfrac{4\mu_0 I^2}{\pi\lambda g}$

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

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1. A
   41.5 J
2. B
   83 J
3. C
   124.5 J
4. D
   166 J

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1. A
   $V_1 = 0, V_2 < V_3$
2. B
   $V_1 = 0, V_2 > V_3$
3. C
   $V_1 > V_2, V_3 = 0$
4. D
   $V_1 < V_2, V_3 = 0$

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1. A
   $\dfrac{2}{450}$
2. B
   $\dfrac{1}{250}$
3. C
   225
4. D
   275

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1. A
   Measurement of resistance of a wire using meter bridge
2. B
   Measurement of gravitational acceleration using simple pendulum
3. C
   Measurement of focal length of lenses using optical bench
4. D
   Measurement of speed of sound using resonance tube

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1. A
   2
2. B
   6
3. C
   9
4. D
   18

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1. A
   0
2. B
   1
3. C
   2
4. D
   3

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1. A
   P constant (horizontal line) from $\pi/2$ to $-\pi/2$
2. B
   P starts high, dips to zero at $\theta = 0$, then rises (V-shape / cusp at 0)
3. C
   P is zero at $\theta = \pi/2$ and $-\pi/2$, maximum at $\theta = 0$ (dome shape)
4. D
   P decreases linearly (straight line falling from $\pi/2$ to $-\pi/2$)

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1. A
   $2\pi R^3\alpha\Delta T$
2. B
   $3\pi R^3\alpha\Delta T$
3. C
   $4\pi R^3\alpha\Delta T$
4. D
   $6\pi R^3\alpha\Delta T$

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

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1. A
   0.60 cm
2. B
   0.96 cm
3. C
   1.00 cm
4. D
   1.04 cm

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