CBSE Class 12 Physics 2024 question paper (55/5)

1. A.
   $2\ \Omega$
2. B.
   $1.2\ \Omega$
3. C.
   $1\ \Omega$
4. D.
   $0.5\ \Omega$

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

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1. A.
   Copper and Aluminium
2. B.
   Sodium and Calcium
3. C.
   Lead and Iron
4. D.
   Nickel and Cobalt

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1. A.
   $4.8\ \mathrm{k}\Omega$
2. B.
   $5.0\ \mathrm{k}\Omega$
3. C.
   $5.2\ \mathrm{k}\Omega$
4. D.
   $5.4\ \mathrm{k}\Omega$

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1. A.
   0.4 mH
2. B.
   2.5 mH
3. C.
   10 mH
4. D.
   2.5 H

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1. A.
   Infrared rays
2. B.
   Ultraviolet rays
3. C.
   X-rays
4. D.
   Gamma rays

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1. A.
   250
2. B.
   200
3. C.
   150
4. D.
   125

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

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1. A.
   $-13.6$ eV, $27.2$ eV
2. B.
   $-6.8$ eV, $13.6$ eV
3. C.
   $3.4$ eV, $-6.8$ eV
4. D.
   $6.8$ eV, $-3.4$ eV

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1. A.
   4th
2. B.
   6th
3. C.
   8th
4. D.
   10th

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1. A.
   0.8 fm
2. B.
   1.6 fm
3. C.
   2.0 fm
4. D.
   2.8 fm

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1. A.
   $1.2 \times 10^{15}$
2. B.
   $1.5 \times 10^{16}$
3. C.
   $3.0 \times 10^{15}$
4. D.
   $2.0 \times 10^{16}$

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   $\mathrm{O_2}$
2. B.
   $\mathrm{H_2}$
3. C.
   $\mathrm{N_2}$
4. D.
   $\mathrm{HCl}$

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1. A.
   A polar dielectric has a net dipole moment in absence of an external electric field which gets modified due to the induced dipoles.
2. B.
   The net dipole moments of induced dipoles is along the direction of the applied electric field.
3. C.
   Dielectrics contain free charges.
4. D.
   The electric field produced due to induced surface charges inside a dielectric is along the external electric field.

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1. A.
   increases and the electric field inside it also increases.
2. B.
   decreases and the electric field also decreases.
3. C.
   decreases and the electric field increases.
4. D.
   increases and the electric field decreases.

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1. A.
   $\left[\frac{4K}{5K + 1}\right]C_0$
2. B.
   $\left[\frac{K + 5}{4}\right]C_0$
3. C.
   $\left[\frac{5K}{4K + 1}\right]C_0$
4. D.
   $\left[\frac{K + 4}{5K}\right]C_0$

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1. A.
   $\frac{1}{4}$
2. B.
   $\frac{1}{6}$
3. C.
   $\frac{2}{15}$
4. D.
   $\frac{3}{16}$

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1. A.
   less than $\theta_2$
2. B.
   between $\theta_1$ and $\theta_2$
3. C.
   greater than $\theta_2$
4. D.
   less than $\theta_1$

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1. A.
   $\lambda$ and $\nu$ both increase.
2. B.
   $\lambda$ increases but $\nu$ is unchanged.
3. C.
   $\lambda$ decreases but $\nu$ is unchanged.
4. D.
   $\lambda$ and $\nu$ both decrease.

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1. A.
   red colour
2. B.
   blue colour
3. C.
   yellow colour
4. D.
   violet colour

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1. A.
   $r_V < r_Y < r_R$
2. B.
   $r_Y < r_R < r_V$
3. C.
   $r_R < r_Y < r_V$
4. D.
   $r_R = r_Y = r_V$

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1. A.
   go straight undeviated
2. B.
   just graze along the face AC
3. C.
   refract and go out of the prism
4. D.
   undergo total internal reflection

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1. A.
   A will increase, V will decrease.
2. B.
   A will decrease, V will increase.
3. C.
   Both A and V will decrease.
4. D.
   Both A and V will increase.

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1. A.
   leads the voltage by $\left(\frac{1}{4}\right)$ cycle.
2. B.
   lags the voltage by $\left(\frac{1}{4}\right)$ cycle.
3. C.
   leads the voltage by $\left(\frac{1}{2}\right)$ cycle.
4. D.
   lags the voltage by $\left(\frac{1}{2}\right)$ cycle.

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1. A.
   a force of attraction and no torque.
2. B.
   a force of attraction and a torque.
3. C.
   a torque and no force.
4. D.
   neither a force nor a torque.

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1. A.
   $\frac{\mathrm{I} + \mathrm{I}_g}{\mathrm{I} - \mathrm{I}_g}$
2. B.
   $\frac{\mathrm{I} - \mathrm{I}_g}{\mathrm{I} + \mathrm{I}_g}$
3. C.
   $\frac{2\mathrm{I} - \mathrm{I}_g}{\mathrm{I} - \mathrm{I}_g}$
4. D.
   $\frac{\mathrm{I} - \mathrm{I}_g}{2\mathrm{I} - \mathrm{I}_g}$

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1. A.
   0.5 V
2. B.
   1.0 V
3. C.
   1.5 V
4. D.
   3.0 V

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1. A.
   $1.2 \times 10^{15}$
2. B.
   $1.5 \times 10^{16}$
3. C.
   $3.0 \times 10^{15}$
4. D.
   $2.0 \times 10^{16}$

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1. A.
   0.8 fm
2. B.
   1.6 fm
3. C.
   2.0 fm
4. D.
   2.8 fm

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1. A.
   0.88 mm
2. B.
   0.59 mm
3. C.
   0.33 mm
4. D.
   0.44 mm

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

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1. A.
   $-13.6$ eV, $27.2$ eV
2. B.
   $-6.8$ eV, $13.6$ eV
3. C.
   $3.4$ eV, $-6.8$ eV
4. D.
   $6.8$ eV, $-3.4$ eV

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1. A.
   Infrared rays
2. B.
   Ultraviolet rays
3. C.
   X-rays
4. D.
   Gamma rays

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1. A.
   250
2. B.
   200
3. C.
   150
4. D.
   125

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   less than $\theta_2$
2. B.
   between $\theta_1$ and $\theta_2$
3. C.
   greater than $\theta_2$
4. D.
   less than $\theta_1$

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1. A.
   $\lambda$ and $\nu$ both increase.
2. B.
   $\lambda$ increases but $\nu$ is unchanged.
3. C.
   $\lambda$ decreases but $\nu$ is unchanged.
4. D.
   $\lambda$ and $\nu$ both decrease.

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1. A.
   red colour
2. B.
   blue colour
3. C.
   yellow colour
4. D.
   violet colour

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1. A.
   $r_V < r_Y < r_R$
2. B.
   $r_Y < r_R < r_V$
3. C.
   $r_R < r_Y < r_V$
4. D.
   $r_R = r_Y = r_V$

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1. A.
   go straight undeviated
2. B.
   just graze along the face AC
3. C.
   refract and go out of the prism
4. D.
   undergo total internal reflection

Tap an option to check your answer.

1. A.
   $\mathrm{O_2}$
2. B.
   $\mathrm{H_2}$
3. C.
   $\mathrm{N_2}$
4. D.
   $\mathrm{HCl}$

Tap an option to check your answer.

1. A.
   A polar dielectric has a net dipole moment in absence of an external electric field which gets modified due to the induced dipoles.
2. B.
   The net dipole moments of induced dipoles is along the direction of the applied electric field.
3. C.
   Dielectrics contain free charges.
4. D.
   The electric field produced due to induced surface charges inside a dielectric is along the external electric field.

Tap an option to check your answer.

1. A.
   increases and the electric field inside it also increases.
2. B.
   decreases and the electric field also decreases.
3. C.
   decreases and the electric field increases.
4. D.
   increases and the electric field decreases.

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1. A.
   $\left[\frac{4K}{5K + 1}\right]C_0$
2. B.
   $\left[\frac{K + 5}{4}\right]C_0$
3. C.
   $\left[\frac{5K}{4K + 1}\right]C_0$
4. D.
   $\left[\frac{K + 4}{5K}\right]C_0$

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1. A.
   $\frac{1}{4}$
2. B.
   $\frac{1}{6}$
3. C.
   $\frac{2}{15}$
4. D.
   $\frac{3}{16}$

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

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1. A.
   $\frac{\mu_0 I}{R}$
2. B.
   $\frac{\mu_0 I}{2R}$
3. C.
   $\frac{\mu_0 I}{4R}$
4. D.
   $\frac{2\mu_0 I}{R}$

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1. A.
   Aluminium
2. B.
   Water
3. C.
   Gadolinium
4. D.
   Bismuth

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1. A.
   $0.1\ \Omega$
2. B.
   $0.8\ \Omega$
3. C.
   $1.0\ \Omega$
4. D.
   $10\ \Omega$

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1. A.
   $\frac{\pi}{5}$
2. B.
   $5\pi$
3. C.
   $0.5\pi$
4. D.
   $0.05\pi$

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1. A.
   0.8 fm
2. B.
   1.6 fm
3. C.
   2.0 fm
4. D.
   2.8 fm

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1. A.
   $1.2 \times 10^{15}$
2. B.
   $1.5 \times 10^{16}$
3. C.
   $3.0 \times 10^{15}$
4. D.
   $2.0 \times 10^{16}$

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1. A.
   $-13.6$ eV, $27.2$ eV
2. B.
   $-6.8$ eV, $13.6$ eV
3. C.
   $3.4$ eV, $-6.8$ eV
4. D.
   $6.8$ eV, $-3.4$ eV

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1. A.
   Infrared rays
2. B.
   Ultraviolet rays
3. C.
   X-rays
4. D.
   Gamma rays

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

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1. A.
   250
2. B.
   200
3. C.
   150
4. D.
   125

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1. A.
   real, at a distance 1.8 m from the surface.
2. B.
   virtual, at a distance 1.8 m from the surface.
3. C.
   real, at a distance 3.6 m from the surface.
4. D.
   virtual, at a distance 3.6 m from the surface.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true but Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   less than $\theta_2$
2. B.
   between $\theta_1$ and $\theta_2$
3. C.
   greater than $\theta_2$
4. D.
   less than $\theta_1$

Tap an option to check your answer.

1. A.
   $\lambda$ and $\nu$ both increase.
2. B.
   $\lambda$ increases but $\nu$ is unchanged.
3. C.
   $\lambda$ decreases but $\nu$ is unchanged.
4. D.
   $\lambda$ and $\nu$ both decrease.

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1. A.
   red colour
2. B.
   blue colour
3. C.
   yellow colour
4. D.
   violet colour

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1. A.
   $r_V < r_Y < r_R$
2. B.
   $r_Y < r_R < r_V$
3. C.
   $r_R < r_Y < r_V$
4. D.
   $r_R = r_Y = r_V$