Build a question paper in 60 seconds.

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

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1. A
   1.8 km/s
2. B
   9 km/s
3. C
   3.6 km/s
4. D
   2.7 km/s

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1. A
   $2.5\times10^{-3}$ J
2. B
   $1.0\times10^{-3}$ J
3. C
   $1.0\times10^{-4}$ J
4. D
   $5\times10^{-3}$ J

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1. A
   $\frac{2\lambda}{\varepsilon_0}$
2. B
   $\frac{\lambda}{2\varepsilon_0}$
3. C
   $\frac{\lambda}{4\varepsilon_0}$
4. D
   $\frac{\lambda}{\varepsilon_0}$

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1. A
   A pilot in an aeroplane which is taking off.
2. B
   A child revolving in a merry-go-round.
3. C
   A driver in a bus which is moving with constant velocity.
4. D
   A man in a train which is slowing down to stop.

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1. A
   $\frac{r^2 q B^2}{2V}$
2. B
   $\frac{r^2 q^2 B^2}{2V}$
3. C
   $\frac{qrB}{2V}$
4. D
   $\frac{q^2 r^2 B^2}{v}$

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1. A
   $T_1 - T_2$
2. B
   $T_1 T_2$
3. C
   $\sqrt{T_1^2 - T_2^2}$
4. D
   $\frac{T_2}{T_1}$

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1. A
   20 mA
2. B
   5 mA
3. C
   10 mA
4. D
   15 mA

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1. A
   $\frac{4\pi G}{3gR}$
2. B
   $\frac{3\pi R}{4gG}$
3. C
   $\frac{3g}{4\pi RG}$
4. D
   $\frac{\pi RG}{12g}$

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1. A
   increases
2. B
   decreases
3. C
   either increases or decreases
4. D
   first decreases then become minimum and then increases.

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1. A
   $8\,\Omega$
2. B
   $7\,\Omega$
3. C
   $6\,\Omega$
4. D
   $5\,\Omega$

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1. A
   1800 K
2. B
   1200 K
3. C
   900 K
4. D
   600 K

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1. A
   increase the wavelength of light.
2. B
   increase the refractive index of the medium between the object and objective lens.
3. C
   decrease the focal length of the eye-piece.
4. D
   decrease the diameter of the objective lens.

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1. A
   24 s
2. B
   3 s
3. C
   1.5 s
4. D
   48 s

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

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1. A
   $\frac{mV^2}{5R}$
2. B
   $\frac{mV^2}{3R}$
3. C
   $\frac{mV^2}{7R}$
4. D
   $\frac{mV^2}{9R}$

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1. A
   5 cm
2. B
   8 cm
3. C
   12 cm
4. D
   24 cm

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1. A
   $2N_A I_A = N_B I_B$
2. B
   $N_A = 2N_B$
3. C
   $N_A I_A = 4N_B I_B$
4. D
   $4N_A I_A = N_B I_B$

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1. A
   0.06 m
2. B
   1.04 m
3. C
   2.34 m
4. D
   3.06 m

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

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1. A
   first
2. B
   second
3. C
   third
4. D
   fourth

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1. A
   500
2. B
   1000
3. C
   2000
4. D
   4000

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1. A
   $\frac{I_0}{8}$
2. B
   $\frac{3I_0}{16}$
3. C
   $\frac{3I_0}{32}$
4. D
   $\frac{I_0}{32}$

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1. A
   a zener diode
2. B
   a p-n junction diode
3. C
   an intrinsic semiconductor
4. D
   an extrinsic semiconductor

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

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