CBSE Class 12 Physics 2025 question paper (55/4)

1. A.
   increases by $4{\cdot}5 \times 10^{-7}$ kg
2. B.
   decreases by $1{\cdot}0 \times 10^{-6}$ kg
3. C.
   decreases by $4{\cdot}55 \times 10^{-23}$ kg
4. D.
   increases by $9{\cdot}1 \times 10^{-23}$ kg

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   a circular path in XZ plane
2. B.
   a semicircular path in XY plane
3. C.
   a helical path with its axis parallel to Y-axis
4. D.
   a semicircular path in YZ plane

Tap an option to check your answer.

1. A.
   $30^{\circ}$
2. B.
   $45^{\circ}$
3. C.
   $60^{\circ}$
4. D.
   $75^{\circ}$

Tap an option to check your answer.

1. A.
   Aluminium
2. B.
   Sodium Chloride
3. C.
   Calcium
4. D.
   Copper Chloride

Tap an option to check your answer.

1. A.
   $10\sqrt{2}$ A
2. B.
   $\dfrac{10}{\sqrt{2}}$ A
3. C.
   $\dfrac{10}{\pi}$ A
4. D.
   $\dfrac{10}{\sqrt{2}\,\pi}$ A

Tap an option to check your answer.

1. A.
   $3{\cdot}0 \times 10^{-3}$ T
2. B.
   $3{\cdot}33 \times 10^{-8}$ T
3. C.
   $3{\cdot}0 \times 10^{11}$ T
4. D.
   $3{\cdot}33 \times 10^{-6}$ T

Tap an option to check your answer.

1. A.
   Convex and virtual
2. B.
   Concave and real
3. C.
   Concave and virtual
4. D.
   Convex and real

Tap an option to check your answer.

1. A.
   Photons of light show diffraction whereas electrons do not show diffraction.
2. B.
   Electrons have momentum whereas photons do not have momentum.
3. C.
   Photons of light and electrons both exhibit dual nature.
4. D.
   All electromagnetic radiations do not have photons.

Tap an option to check your answer.

1. A.
   The blue beam has more number of photons than the red beam.
2. B.
   The red beam has more number of photons than the blue beam.
3. C.
   Wavelength of red light is lesser than wavelength of blue light.
4. D.
   The blue light beam has lesser energy per photon than that in the red light beam.

Tap an option to check your answer.

1. A.
   Sn
2. B.
   Mica
3. C.
   Si
4. D.
   C

Tap an option to check your answer.

1. A.
   horizontal straight lines directed radially out from the wire.
2. B.
   straight lines parallel to the current-carrying wire.
3. C.
   concentric horizonal circles around the wire.
4. D.
   coaxial helixes around the wire.

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 K L^2}{d}$
2. B.
   $\dfrac{\varepsilon_0 K L^2}{2d}$
3. C.
   $\dfrac{2\varepsilon_0 K L^2}{d}$
4. D.
   $\dfrac{2\varepsilon_0 K d}{L^2}$

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 V K L^2}{2d}$
2. B.
   $\dfrac{\varepsilon_0 V K L^2}{d}$
3. C.
   $\dfrac{2\varepsilon_0 V K L^2}{d}$
4. D.
   $\dfrac{\varepsilon_0 V K L^2}{4d}$

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 V K L^2}{4d}$
2. B.
   $\dfrac{\varepsilon_0 V K L^2}{2d}$
3. C.
   $\dfrac{\varepsilon_0 V K L^2}{d}$
4. D.
   Zero

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $\dfrac{Ke^2}{r}$
2. B.
   $-\dfrac{Ke^2}{2r}$
3. C.
   $\dfrac{Ke^2}{2r}$
4. D.
   $\dfrac{3}{2}\,\dfrac{Ke^2}{r}$

Tap an option to check your answer.

1. A.
   $2{\cdot}48,\ -2{\cdot}48$
2. B.
   $-1{\cdot}24,\ 1{\cdot}24$
3. C.
   $-2{\cdot}48,\ 2{\cdot}48$
4. D.
   $1{\cdot}24,\ -1{\cdot}24$

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $0{\cdot}53$ Å
2. B.
   $1{\cdot}06$ Å
3. C.
   $1{\cdot}59$ Å
4. D.
   $2{\cdot}12$ Å

Tap an option to check your answer.

1. A.
   $0{\cdot}5 \times 10^{-6}$ Nm
2. B.
   $1{\cdot}0 \times 10^{-8}$ Nm
3. C.
   $2{\cdot}0 \times 10^{-8}$ Nm
4. D.
   $4{\cdot}0 \times 10^{-8}$ Nm

Tap an option to check your answer.

1. A.
   the electrons coming from the power source move fast through the initially empty filament.
2. B.
   the filament may be old having low resistance.
3. C.
   electric field is established instantaneously across the filament which pushes the electrons.
4. D.
   free electrons in the filament travel with the speed of light.

Tap an option to check your answer.

1. A.
   $qv_0\,(B_1 + B_2)$
2. B.
   $q\sqrt{v_0\,(B_1 + B_2)}$
3. C.
   $q\,v_0\sqrt{(B_1^2 + B_2^2)}$
4. D.
   $q\sqrt{v_0\,(B_1^2 + B_2^2)}$

Tap an option to check your answer.

1. A.
   $30^{\circ}$
2. B.
   $45^{\circ}$
3. C.
   $60^{\circ}$
4. D.
   $75^{\circ}$

Tap an option to check your answer.

1. A.
   diamagnetic
2. B.
   paramagnetic
3. C.
   ferromagnetic
4. D.
   non-magnetic

Tap an option to check your answer.

1. A.
   6 mH
2. B.
   12 mH
3. C.
   3 mH
4. D.
   9 mH

Tap an option to check your answer.

1. A.
   $1{\cdot}8 \times 10^{-5}$ A
2. B.
   $3{\cdot}47 \times 10^{-6}$ A
3. C.
   $8{\cdot}85 \times 10^{-8}$ A
4. D.
   $6{\cdot}32 \times 10^{-4}$ A

Tap an option to check your answer.

1. A.
   horizontal straight lines directed radially out from the wire.
2. B.
   straight lines parallel to the current-carrying wire.
3. C.
   concentric horizonal circles around the wire.
4. D.
   coaxial helixes around the wire.

Tap an option to check your answer.

1. A.
   Sn
2. B.
   Mica
3. C.
   Si
4. D.
   C

Tap an option to check your answer.

1. A.
   Convex and virtual
2. B.
   Concave and real
3. C.
   Concave and virtual
4. D.
   Convex and real

Tap an option to check your answer.

1. A.
   Photons of light show diffraction whereas electrons do not show diffraction.
2. B.
   Electrons have momentum whereas photons do not have momentum.
3. C.
   Photons of light and electrons both exhibit dual nature.
4. D.
   All electromagnetic radiations do not have photons.

Tap an option to check your answer.

1. A.
   The blue beam has more number of photons than the red beam.
2. B.
   The red beam has more number of photons than the blue beam.
3. C.
   Wavelength of red light is lesser than wavelength of blue light.
4. D.
   The blue light beam has lesser energy per photon than that in the red light beam.

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $\dfrac{Ke^2}{r}$
2. B.
   $-\dfrac{Ke^2}{2r}$
3. C.
   $\dfrac{Ke^2}{2r}$
4. D.
   $\dfrac{3}{2}\,\dfrac{Ke^2}{r}$

Tap an option to check your answer.

1. A.
   $2{\cdot}48,\ -2{\cdot}48$
2. B.
   $-1{\cdot}24,\ 1{\cdot}24$
3. C.
   $-2{\cdot}48,\ 2{\cdot}48$
4. D.
   $1{\cdot}24,\ -1{\cdot}24$

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $0{\cdot}53$ Å
2. B.
   $1{\cdot}06$ Å
3. C.
   $1{\cdot}59$ Å
4. D.
   $2{\cdot}12$ Å

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 K L^2}{d}$
2. B.
   $\dfrac{\varepsilon_0 K L^2}{2d}$
3. C.
   $\dfrac{2\varepsilon_0 K L^2}{d}$
4. D.
   $\dfrac{2\varepsilon_0 K d}{L^2}$

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 V K L^2}{2d}$
2. B.
   $\dfrac{\varepsilon_0 V K L^2}{d}$
3. C.
   $\dfrac{2\varepsilon_0 V K L^2}{d}$
4. D.
   $\dfrac{\varepsilon_0 V K L^2}{4d}$

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $\dfrac{\varepsilon_0 V K L^2}{4d}$
2. B.
   $\dfrac{\varepsilon_0 V K L^2}{2d}$
3. C.
   $\dfrac{\varepsilon_0 V K L^2}{d}$
4. D.
   Zero

Tap an option to check your answer.

1. A.
   $\tan^{-1}\dfrac{4\pi\varepsilon_0 E r^2}{Q}$
2. B.
   $\cot^{-1}\dfrac{4\pi\varepsilon_0 E r^2}{Q}$
3. C.
   $\tan^{-1}\dfrac{QE}{4\pi\varepsilon_0 r^2}$
4. D.
   $\cot^{-1}\dfrac{QE}{4\pi\varepsilon_0 r^2}$

Tap an option to check your answer.

1. A.
   $R_A > R_B > R_C$
2. B.
   $R_B > R_C > R_A$
3. C.
   $R_C > R_A > R_B$
4. D.
   $R_A > R_C > R_B$

Tap an option to check your answer.

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

Tap an option to check your answer.

1. A.
   $30^{\circ}$
2. B.
   $45^{\circ}$
3. C.
   $60^{\circ}$
4. D.
   $75^{\circ}$

Tap an option to check your answer.

1. A.
   Sodium
2. B.
   Iron
3. C.
   Aluminium
4. D.
   Copper

Tap an option to check your answer.

1. A.
   $0{\cdot}5$ A
2. B.
   $1{\cdot}0$ A
3. C.
   $1{\cdot}5$ A
4. D.
   $2{\cdot}0$ A

Tap an option to check your answer.

1. A.
   $2 \times 10^{4}\ \mathrm{Vm^{-1}}$
2. B.
   $1{\cdot}5 \times 10^{12}\ \mathrm{Vm^{-1}}$
3. C.
   $1{\cdot}8 \times 10^{5}\ \mathrm{Vm^{-1}}$
4. D.
   $0{\cdot}3 \times 10^{4}\ \mathrm{Vm^{-1}}$

Tap an option to check your answer.

1. A.
   horizontal straight lines directed radially out from the wire.
2. B.
   straight lines parallel to the current-carrying wire.
3. C.
   concentric horizonal circles around the wire.
4. D.
   coaxial helixes around the wire.

Tap an option to check your answer.

1. A.
   Convex and virtual
2. B.
   Concave and real
3. C.
   Concave and virtual
4. D.
   Convex and real

Tap an option to check your answer.

1. A.
   Photons of light show diffraction whereas electrons do not show diffraction.
2. B.
   Electrons have momentum whereas photons do not have momentum.
3. C.
   Photons of light and electrons both exhibit dual nature.
4. D.
   All electromagnetic radiations do not have photons.

Tap an option to check your answer.

1. A.
   The blue beam has more number of photons than the red beam.
2. B.
   The red beam has more number of photons than the blue beam.
3. C.
   Wavelength of red light is lesser than wavelength of blue light.
4. D.
   The blue light beam has lesser energy per photon than that in the red light beam.

Tap an option to check your answer.

1. A.
   Sn
2. B.
   Mica
3. C.
   Si
4. D.
   C

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.

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

Tap an option to check your answer.