Physics MCQs

Correct answer C. Scanning electron microscope

Correct answer D. Converging source of electrons

Correct answer A. Wavelength is very short

Correct answer B. Wave property

Correct answer A. Wave property

Correct answer D. 2.46 × 10⁻³⁶ kg

Correct answer D. Double

Correct answer B. The average kinetic energy of the photoelectrons decreases

Correct answer B. Remains same

Correct answer A. It remains the same

Correct answer A. 10³ photons of wavelength 2 pm (γ-rays)

Correct answer A. A quantum of electromagnetic radiation

Correct answer D. Electron diffraction

Correct answer A. The angle of scattering is 180°

Correct answer A. Einstein

Correct answer C. It shifts towards shorter wavelengths

Correct answer C. ½mv²max = hf - Φ

Correct answer B. Zero

Correct answer A. Infinite

Correct answer C. ΔE·Δt = h