JEE Advanced - Physics Mock Tests

The speed of sound in a gas is given by Laplace formula as:

A radioactive nucleus emits an alpha particle. If the mass number of the parent nucleus is 238 and atomic number is 92, the mass number and atomic number of the daughter nucleus are respectively:

A wave is described by y = 0.05 sin(40x − 200t). The wavelength and speed of the wave are respectively:

A parallel plate capacitor with air between the plates has capacitance 8 pF. If the distance between plates is halved and the space is filled with a dielectric of constant K = 6, the new capacitance is:

A Zener diode with a breakdown voltage of 6 V is used as a voltage regulator. The input voltage is 16 V. A series resistor of 1 kΩ is used and the load resistance is 1 kΩ. The current through the Zener diode is:

A transformer has 100 turns in the primary and 200 turns in the secondary. If the primary voltage is 220 V and the primary current is 1 A, the secondary voltage and current are (assuming 100% efficiency)

Two waves are described by y₁ = 3 sin(100πt) and y₂ = 4 sin(100πt + π/2). The amplitude of the resultant wave is:

Root mean square speed of gas molecules is proportional to: