Build a question paper in 60 seconds.

1. A
   $\frac{V}{2(l+1.2r)}$
2. B
   $\frac{V}{(l+1.2r)}$
3. C
   $\frac{V}{(l+0.3r)}$
4. D
   $\frac{V}{(l+0.6r)}$

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1. A
   Opposite to its velocity.
2. B
   Perpendicular to its velocity.
3. C
   Zero.
4. D
   Along its velocity.

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1. A
   $3.5$
2. B
   $2.5$
3. C
   $4.5$
4. D
   $3$

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1. A
   $2R$
2. B
   $3R$
3. C
   $4R$
4. D
   $5R$

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1. A
   0.8 A
2. B
   1.2 A
3. C
   1.5 A
4. D
   1.8 A

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1. A
   30%
2. B
   40%
3. C
   50%
4. D
   60%

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1. A
   Charge remains constant after it is isolated.
2. B
   Potential difference across the plates decreases.
3. C
   Potential difference across the plates increases.
4. D
   Capacitance of capacitor decreases.

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

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1. A
   yellow, orange, red
2. B
   violet, indigo, blue
3. C
   green, yellow, orange
4. D
   all colours except green

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

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1. A
   $\frac{V_R R}{V_L \omega}$
2. B
   $\frac{V_L}{V_R}\frac{R}{\omega}$
3. C
   $\frac{V_R\omega}{V_L R}$
4. D
   $\frac{V_L R}{V_R \omega}$

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1. A
   its length is doubled.
2. B
   its length is made four times.
3. C
   its length is made half.
4. D
   the mass of the bob is doubled.

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1. A
   $(A\cdot\bar{B})+(\bar{A}\cdot B)$
2. B
   $A+(\bar{A}\cdot B)$
3. C
   $(A\cdot B)+B$
4. D
   $(\bar{A}\cdot\bar{B})+(A\cdot B)$

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

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1. A
   5:6
2. B
   6:7
3. C
   6:5
4. D
   7:6

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1. A
   $\phi_x=\phi_y$
2. B
   $\phi_x<\phi_y$
3. C
   $\phi_x>\phi_y$
4. D
   $\phi_x=\phi_y=0$

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1. A
   $12\text{ cm s}^{-1}$
2. B
   $9\text{ cm s}^{-1}$
3. C
   $6\text{ cm s}^{-1}$
4. D
   $3\text{ cm s}^{-1}$

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1. A
   $1.2\times10^{-3}$ Wb
2. B
   $1.8\times10^{-3}$ Wb
3. C
   $3.6\times10^{-3}$ Wb
4. D
   $7.2\times10^{-3}$ Wb

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1. A
   $\frac{\alpha_i}{\alpha_c+\alpha_i}$
2. B
   $\frac{\alpha_c}{\alpha_c+\alpha_i}$
3. C
   $\frac{\alpha_i-\alpha_c}{\alpha_c+\alpha_i}$
4. D
   $\frac{\alpha_c-\alpha_i}{\alpha_c+\alpha_i}$

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1. A
   $\frac{1}{\pi}$ m/s
2. B
   $\frac{1}{2\pi}$ m/s
3. C
   $\frac{1}{4\pi}$ m/s
4. D
   $\frac{2}{\pi}$ m/s

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1. A
   $\sqrt{\frac{q}{4\pi\varepsilon_{0}mr}}$
2. B
   $\sqrt{\frac{q}{2\pi\varepsilon_{0}mr}}$
3. C
   $\sqrt{\frac{q}{4\pi\varepsilon_{0}mr}}$
4. D
   $\sqrt{\frac{q^{2}}{4\pi\varepsilon_{0}mr}}$

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1. A
   101:102
2. B
   102:101
3. C
   8:1
4. D
   2:1

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

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1. A
   5%
2. B
   10%
3. C
   20%
4. D
   25%

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1. A
   $\frac{1}{n^{2}}\frac{h^{2}}{8\pi^{2}I}$
2. B
   $\frac{1}{n}\frac{h^{2}}{8\pi^{2}I}$
3. C
   $n\frac{h^{2}}{8\pi^{2}I}$
4. D
   $n^{2}\frac{h^{2}}{8\pi^{2}I}$

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