Physics Test 96...

A stationary thorium nucleus (A = 220, Z = 90) emits an alpha particle with kinetic energy E_α. What is the kinetic energy of the recoiling nucleus ?

In the circtuit shown, which of the following statement is/are CORRECT :

A conducting ring is placed in a  uniform external magnetic field present in the space within the  ring and perpendicular to plane of ring. The magnetic  field changes at a constant rate due to which a current of magnitude 4 amp flows in the ring. The resistance of parts PQR and PSR are 4Ω and 8Ω  respectively. Then :-

A point charge q₁ is placed inside a neutral conducting shell at a distance R/2 from the centre of shell. Another point charge q₂ is placed at a distance √7 / 2 R from the centre of shell. Choose the CORRECT option(s) :-

In a circuit, voltmeter reads 3V and the ammeter reads 2A. Then wrong option is :-

If light travels a distance x in time t₁ sec in air and 10x distance in time t₂ in a certain medium, then find the critical angle of the medium.

The angle of a prism is ‘A’. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index µ, of the prism is :-

In Young's double slit experiment, the slits are 2mm apart and are illuminated by photons of two wavelengths λ₁ = 12000Å and λ₂ = 10000Å. At what minimum distance from the common central bright fringe on the screen 2m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other ?

A uniform string of length 20 m & mass 1 kg is hung vertically. Find the speed of wave at the mid point of the string :-

The number of waves in a glass plate of thickness 4 cm is same as in 5 cm of vertical column of water of refractive index 4/3, then refractive index of glass will be :-