CBSE Class 12 Physics 2026 question paper (55/2)

1. A.
   zero
2. B.
   $\frac{-2q^2}{\pi\varepsilon_0 l}$
3. C.
   $\frac{q^2}{2\pi\varepsilon_0 l}$
4. D.
   $\frac{-q^2}{\pi\varepsilon_0 l}$

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1. A.
   The total charge of the two spheres is conserved.
2. B.
   Both spheres attain the same potential.
3. C.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)}{(r_1 + r_2)}$
4. D.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)\,(r_1 + r_2)}{r_1 r_2}$

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1. A.
   work function of the surface '$\phi_0$' only.
2. B.
   frequency of the incident radiation '$\nu$' only.
3. C.
   intensity of the incident radiation 'I' only.
4. D.
   Both $\phi_0$ and $\nu$.

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

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1. A.
   z-axis
2. B.
   $-z$-axis
3. C.
   $x$-axis
4. D.
   $-x$-axis

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1. A.
   Cu
2. B.
   A$l$
3. C.
   Bi
4. D.
   Ni

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1. A.
   10 mA
2. B.
   100 mA
3. C.
   1 mA
4. D.
   3 mA

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1. A.
   $\mathrm{Wbs^2}$, Wbs
2. B.
   $\mathrm{Wb\,s^{-1}}$, Wb
3. C.
   $\mathrm{Wbs^{-2}}$, $\mathrm{Wbs^{-1}}$
4. D.
   $\mathrm{Wbs^{-1}}$, $\mathrm{Wbs^{-2}}$

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

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1. A.
   the induced current will flow in the anticlockwise direction.
2. B.
   the induced current will flow in the clockwise direction.
3. C.
   no induced current will flow in the solenoid.
4. D.
   the magnet will fall with a constant velocity.

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

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1. A.
   $\frac{8}{7}\lambda$
2. B.
   $\frac{24}{7}\lambda$
3. C.
   $\frac{16}{7}\lambda$
4. D.
   $\frac{32}{7}\lambda$

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

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

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

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

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1. A.
   Phosphorus
2. B.
   Arsenic
3. C.
   Boron
4. D.
   Antimony

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1. A.
   $5 \times 10^{22}$ $\mathrm{m^{-3}}$
2. B.
   $1.5 \times 10^{6}$ $\mathrm{m^{-3}}$
3. C.
   $9 \times 10^{8}$ $\mathrm{m^{-3}}$
4. D.
   $4.5 \times 10^{9}$ $\mathrm{m^{-3}}$

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1. A.
   current is mainly due to drifting of majority carriers.
2. B.
   current is mainly due to drifting of minority carriers.
3. C.
   diffusion and drift currents are equal.
4. D.
   current is of the order of 1 A.

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1. A.
   0.2 V
2. B.
   0.5 V
3. C.
   0.7 V
4. D.
   1.5 V

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1. A.
   0.01 eV
2. B.
   0.05 eV
3. C.
   0.1 eV
4. D.
   0.15 eV

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1. A.
   $\sqrt{\mathrm{D(D - 4f)}}$
2. B.
   $\sqrt{\mathrm{D(D - 2f)}}$
3. C.
   $2\sqrt{\mathrm{Df}}$
4. D.
   $\sqrt{\mathrm{D(D - f)}}$

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1. A.
   reduced, enlarged
2. B.
   reduced, reduced
3. C.
   enlarged, enlarged
4. D.
   enlarged, reduced

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1. A.
   15.50 cm
2. B.
   18.75 cm
3. C.
   20.50 cm
4. D.
   22.75 cm

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1. A.
   45 cm
2. B.
   50 cm
3. C.
   55 cm
4. D.
   65 cm

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1. A.
   $-15$ cm
2. B.
   $-10$ cm
3. C.
   $-20$ cm
4. D.
   $-30$ cm

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1. A.
   $-\frac{q^2}{\pi\varepsilon_0}$
2. B.
   $-\frac{2q^2}{3\pi\varepsilon_0}$
3. C.
   $\frac{q^2}{4\pi\varepsilon_0}$
4. D.
   $\frac{-5q^2}{4\pi\varepsilon_0}$

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1. A.
   $\mathrm{V_1 = V_2 = V_3}$
2. B.
   $\mathrm{V_2 > V_1 > V_3}$
3. C.
   $\mathrm{V_1 > V_2 > V_3}$
4. D.
   $\mathrm{V_3 > V_1 > V_2}$

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

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1. A.
   The total charge of the two spheres is conserved.
2. B.
   Both spheres attain the same potential.
3. C.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)}{(r_1 + r_2)}$
4. D.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)\,(r_1 + r_2)}{r_1 r_2}$

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1. A.
   $\frac{\nu}{3}$
2. B.
   $\frac{\nu}{4}$
3. C.
   $\frac{\nu}{5}$
4. D.
   $\frac{\nu}{6}$

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1. A.
   The speed of the falling magnet increases as it approaches the loop and starts decreasing as it crosses the loop.
2. B.
   Acceleration of magnet increases as it approaches the loop and starts decreasing as it crosses the loop.
3. C.
   Speed of magnet remains uniform as it moves through the loop.
4. D.
   Acceleration of the magnet remains uniform as it moves through the loop.

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1. A.
   I
2. B.
   II
3. C.
   III
4. D.
   IV

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1. A.
   Aluminium
2. B.
   Copper
3. C.
   Lead
4. D.
   Nickel

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1. A.
   y-axis
2. B.
   $-y$-axis
3. C.
   z-axis
4. D.
   $-z$-axis

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1. A.
   10 mA
2. B.
   100 mA
3. C.
   1 mA
4. D.
   3 mA

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1. A.
   $\mathrm{Wbs^2}$, Wbs
2. B.
   $\mathrm{Wb\,s^{-1}}$, Wb
3. C.
   $\mathrm{Wbs^{-2}}$, $\mathrm{Wbs^{-1}}$
4. D.
   $\mathrm{Wbs^{-1}}$, $\mathrm{Wbs^{-2}}$

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

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

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

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

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

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1. A.
   $\sqrt{\mathrm{D(D - 4f)}}$
2. B.
   $\sqrt{\mathrm{D(D - 2f)}}$
3. C.
   $2\sqrt{\mathrm{Df}}$
4. D.
   $\sqrt{\mathrm{D(D - f)}}$

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1. A.
   reduced, enlarged
2. B.
   reduced, reduced
3. C.
   enlarged, enlarged
4. D.
   enlarged, reduced

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1. A.
   15.50 cm
2. B.
   18.75 cm
3. C.
   20.50 cm
4. D.
   22.75 cm

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1. A.
   45 cm
2. B.
   50 cm
3. C.
   55 cm
4. D.
   65 cm

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1. A.
   $-15$ cm
2. B.
   $-10$ cm
3. C.
   $-20$ cm
4. D.
   $-30$ cm

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1. A.
   Phosphorus
2. B.
   Arsenic
3. C.
   Boron
4. D.
   Antimony

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1. A.
   $5 \times 10^{22}$ $\mathrm{m^{-3}}$
2. B.
   $1.5 \times 10^{6}$ $\mathrm{m^{-3}}$
3. C.
   $9 \times 10^{8}$ $\mathrm{m^{-3}}$
4. D.
   $4.5 \times 10^{9}$ $\mathrm{m^{-3}}$

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1. A.
   current is mainly due to drifting of majority carriers.
2. B.
   current is mainly due to drifting of minority carriers.
3. C.
   diffusion and drift currents are equal.
4. D.
   current is of the order of 1 A.

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1. A.
   0.2 V
2. B.
   0.5 V
3. C.
   0.7 V
4. D.
   1.5 V

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1. A.
   0.01 eV
2. B.
   0.05 eV
3. C.
   0.1 eV
4. D.
   0.15 eV

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

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1. A.
   $\mathrm{Wbs^2}$, Wbs
2. B.
   $\mathrm{Wb\,s^{-1}}$, Wb
3. C.
   $\mathrm{Wbs^{-2}}$, $\mathrm{Wbs^{-1}}$
4. D.
   $\mathrm{Wbs^{-1}}$, $\mathrm{Wbs^{-2}}$

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1. A.
   10 mA
2. B.
   100 mA
3. C.
   1 mA
4. D.
   3 mA

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1. A.
   The total charge of the two spheres is conserved.
2. B.
   Both spheres attain the same potential.
3. C.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)}{(r_1 + r_2)}$
4. D.
   The final potential of the system equals $\frac{1}{4\pi\varepsilon_0}\frac{(q_1 + q_2)\,(r_1 + r_2)}{r_1 r_2}$

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1. A.
   South
2. B.
   East
3. C.
   West
4. D.
   North

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1. A.
   Aluminium
2. B.
   Copper chloride
3. C.
   Copper
4. D.
   Nickel

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1. A.
   $\frac{\mathrm{m}}{\mathrm{n}} = c,\ \frac{\beta}{\alpha} \neq c$
2. B.
   $\frac{\mathrm{n}}{\mathrm{m}} = \frac{\alpha}{\beta} = c$
3. C.
   $\frac{\beta}{\alpha} = c,\ \frac{\mathrm{m}}{\mathrm{n}} \neq c$
4. D.
   $\frac{\mathrm{m}}{\mathrm{n}} = \frac{\beta}{\alpha} = c$

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1. A.
   remains stationary
2. B.
   is attracted by loop A
3. C.
   is repelled by loop A
4. D.
   rotates about its centre of mass which is fixed

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1. A.
   $1.05 \times 10^{-34}$ J s
2. B.
   $6.63 \times 10^{-34}$ J s
3. C.
   $3.31 \times 10^{-34}$ J s
4. D.
   $2.1 \times 10^{-34}$ J s

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1. A.
   n
2. B.
   $\mathrm{n^2}$
3. C.
   $\mathrm{n^3}$
4. D.
   $\mathrm{n^4}$

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1. A.
   $2.21 \times 10^{-35}$ kg
2. B.
   $6.63 \times 10^{-33}$ kg
3. C.
   $1.11 \times 10^{-35}$ kg
4. D.
   $3.31 \times 10^{-33}$ kg

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1. A.
   0.54 J
2. B.
   5.4 J
3. C.
   $-0.54$ J
4. D.
   10.8 J

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

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

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

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

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