NEET - Physics मॉक टेस्ट

The Bragg condition for constructive interference in X-ray diffraction from a crystal with lattice spacing d is (where θ is the glancing angle and λ is the wavelength):

A proton and an alpha particle are accelerated through the same potential difference. The ratio of their de Broglie wavelengths λ_p/λ_α is:

In Young's double slit experiment, if the distance between the slits is halved and the distance between the slits and screen is doubled, the new fringe width becomes: (compared to original β)

A long straight wire carries a current of 10 A. The magnetic field at a distance of 5 cm from the wire is:

Two vectors A⃗ = 2î + 3ĵ and B⃗ = 4î - ĵ are acting on a particle. The magnitude of their cross product A⃗ × B⃗ is:

A metallic pendulum clock keeps correct time at 20°C. If the temperature rises to 40°C, the clock will: (coefficient of linear expansion of metal = 1.2 × 10⁻⁵ /°C)

A thermodynamic system undergoes a cyclic process ABCA. The work done by the system in one cycle is represented by the area enclosed in the P-V diagram. If the cycle is clockwise, the net work done by the system is:

In an isothermal process, the temperature: