NEET 2019 P1 Question Paper - PYQ Mock Test

When a block of mass $M$ is suspended by a long wire of length $L$, the length of the wire becomes $(L+l)$. The elastic potential energy stored in the extended wire is:

A mass $m$ is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:

Ionized hydrogen atoms and $\alpha$ -particles with same momenta enter perpendicular to a constant magnetic field, $B$. The ratio of their radii of their paths $r_H:r_{\alpha }$ will be:

Body $A$ of mass $4m$ moving with speed $u$ collides with another body $B$ of mass $2m$, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body $A$ is:

In a double slit experiment, when light of wavelength $400\text{nm}$ was used, the angular width of the first minima formed on a screen placed $1\text{m}$ away, was found to be $0.2^{\circ }$. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water? (${\mu }_{water}=4/3$)