NEET 2019 Exam Paper (Odisha) (180 Q) - Mock Test

The relation amongst the three elements of Earth's magnetic field, namely horizontal component $H$, vertical component $V$ and dip angle $\delta$ is ($B_E$ = total magnetic field):

A proton and an $\alpha$ particle are accelerated from rest to the same energy. The de-Broglie wavelength ${\lambda }_p$ and ${\lambda }_{\alpha }$ are in the ratio:

A truck is stationary and has a bob suspended by a light string in a frame attached to the truck. The truck suddenly moves to the right with an acceleration of $a$. In the frame of the truck, the pendulum will tilt:

The time period of a geostationary satellite is $24\text{hr}$ at a height $6R_E$ ($R_E$ is the radius of the Earth) from the surface of the earth. The time period of another satellite whose height is $2.5R_E$ from the surface will be:

Two metal spheres, one of radius $R$ and the other of radius $2R$ respectively have the same surface charge density $\sigma$. They are brought in contact and separated. What will be the new surface charge densities on them?