Class 11 Physics 2021 2nd Annual MCQs Test

The angel ‘θ’ which \bar{A}=2.3\hat{i}+4.1\hat{j} makes with the positive x-axis is:

The net force that acts on a 10N falling object, when it encounters 4N of air resistance is:

In which of the following system is the entropy decreasing?

Which of the following electromagnetic waves are used in MRI?

The density of mercury at S.T.P is:

Which one of the following is NOT a conservative force?

The value of escape velocity from the earth’s surface is:

A cyclic process is represented by the equation:

Find the dimensions of gravitational constant G from the formula F = G \frac{m_1m_2}{r^2} , where F is force, m1 and m2 are masses and d is the distance between centers of objects.

Range of a projectile on a horizontal plane is same for the following pair of angles:

The principle of the Michelson interferometer is based on the division of:

In a closed organ pipe which one is the second harmonic f2?

A paratrooper falling down with constant velocity is in:

The angular form of centripetal acceleration is:

Torque and Moment of inertia are related according to the equation:

Two monochromatic radiations X and Y are incident normally on a diffraction grating. The second-order intensity maximum for X coincides with the third-order intensity maximum for Y. What is the ratio \frac {wavelength of X}{wavelength of Y} ?

The SI unit of molar specific heat is: