For a transistor,the current amplification factor $\alpha$ is $0.8$. The transistor is connected in a common emitter configuration. The change in the collector current when the base current changes by $6 \, mA$ is ..... $mA$.

The angle between the tangents drawn to the parabola $y^2=4x$ from the point $(1,4)$ is

The solution of $\frac{dy}{dx} = (\frac{x}{y})^{-1/3}$ is

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second heart sound is heard when:

Every planet revolves around the sun in an elliptical orbit. Consider the following statements:
$A.$ The gravitational force acting on a planet is inversely proportional to the square of the distance from the sun.
$B.$ The gravitational force acting on a planet is inversely proportional to the product of the masses of the planet and the sun.
$C.$ The centripetal force acting on the planet is directed away from the sun.
$D.$ The square of the time period of revolution of a planet around the sun is directly proportional to the cube of the semi-major axis of the elliptical orbit.
Choose the correct statements from the options given above:

Data Entry - Physics