CBSE 12 Physics Question Paper-2023 Set-3

An infinite uniformly charged wire produces an electric field of 18 × 10⁴ NC⁻¹ at a distance of 1.0 cm. The linear charge density on the wire is:

A proton and an electron are moving with equal speed. The de Broglie wavelength associated with the proton is:

In a series LCR circuit, the voltage across the resistance, capacitance, and inductance is 15 V, 20 V, and 40 V respectively. The supply voltage is:

The ratio of minimum to maximum frequency of light emitted in Balmer series of hydrogen spectrum, in Bohr's model is:

The current density due to drift of electrons in a conductor is given by: (symbols have their usual meanings)

A particle of mass m and charge q moving with a uniform velocity v = vox i + voy j enters a region with a magnetic field B = B₀ j. Some time after, an electric field E = E₀ j is also switched on in this region. The resultant path of the particle will be:

Which of the following is not a scalar quantity?

At a certain temperature in an intrinsic semiconductor, the electrons and holes concentration is 1.5 × 10¹⁶ m⁻³. When it is doped with a trivalent dopant, hole concentration increases to 4.5 × 10²² m⁻³. In the doped semiconductor, the concentration of electrons (ne) will be:

The ratio of maximum frequency and minimum frequency of light emitted in Balmer series of hydrogen spectrum, in Bohr's model is:

A voltage signal is described by: v = V₀ for 0 ≤ t ≤ T/2 and v = 0 for T/2 ≤ t ≤ T for a cycle. Its rms value is:

A long solenoid has n turns per unit length and a current I flows through it. The magnetic field at its centre is given by:

A proton and an electron are moving with equal speed. The de Broglie wavelength associated with the proton is:

An electric dipole of moment p is placed in a uniform electric field E. The maximum torque experienced by the dipole is:

A proton and a deuteron, with the same kinetic energy, enter a region of uniform magnetic field B, moving perpendicular to B. The ratio of the radii of their circular paths is:

The ratio of minimum to maximum frequency of light emitted in Balmer series of hydrogen spectrum, in Bohr's model is:

The current density due to drift of electrons in a conductor is given by: (symbols have their usual meanings)

Which of the following is not a scalar quantity?

At a certain temperature in an intrinsic semiconductor, the electrons and holes concentration is 1.5 × 10¹⁶ m⁻³. When it is doped with a trivalent dopant, hole concentration increases to 4.5 × 10²² m⁻³. In the doped semiconductor, the concentration of electrons (ne) will be:

The ratio of maximum frequency and minimum frequency of light emitted in Balmer series of hydrogen spectrum, in Bohr's model is:

A voltage signal is described by: v = V₀ for 0 ≤ t ≤ T/2 and v = 0 for T/2 ≤ t ≤ T for a cycle. Its rms value is:

The de Broglie wavelength of an electron moving with 1/10th of the speed of light is:

The electric field due to a dipole varies with distance as:

In the wave picture of light, the intensity I of light is related to the amplitude A of the wave as:

The resolving power of a telescope is: