List of top Physics Questions on Modern Physics asked in MET

Surface of the lake is at 2°C and depth of the lake is 20 m. Find the temperature of the bottom of the lake

\(y_1 = 4\sin(\Omega t + kx)\), \(y_2 = -4\cos(\Omega t + kx)\). The phase difference is

A laser device produces amplification in the

The photoelectric cut-off voltage in an experiment was found to be 1.5 V. The work function for the material used in the experiment was 4.2 eV. The maximum kinetic energy of the photoelectrons emitted was

The ratio of the wavelength of first line of Balmer series to the first line of Lyman series is

An electron at rest is accelerated through a potential difference of 200 V. If the electron acquires a velocity of \(8.4 \times 10^8\) cm/s, its \(e/m\) ratio is

The half-life period of radium is 1600 yr. The fraction of a sample of radium that would remain after 6400 yr is

Cooking is fast in a pressure cooker, because

The unit of Planck's constant is: