Physics Test - ...

At \(t_{1}=2.00 \mathrm{~s}\), the acceleration of a particle in counter clockwise circular motion is \(\left(5 \sqrt{3} m / s^{2}\right) \hat{\imath}+\left(5 m / s^{2}\right) \hat{\jmath}\). It moves at constant speed. At time \(t_{2}=5.00 \mathrm{~s}\), the particle's acceleration is\(\left(5 \mathrm{~m} / \mathrm{s}^{2}\right) \hat{\imath}+\left(-5 \sqrt{3} \mathrm{~m} / \mathrm{s}^{2}\right) \hat{\jmath}\). What is the radius of the path takenby the particle if \(t_{2}-t_{1}\) is less than one period:

Upon catching a ball, a cricket fielder swings his hands backwards. The concept behind this is explained by:

The rms value of an ac current of \(50 \mathrm{~Hz}\) is \(10 \mathrm{amp} .\) The time taken by the alternating current in reaching from zero to maximum value and the peak value of current will be:

Which of the following statements are correct?

i. The natural tendency of objects to resist a change in their state of rest or of uniform motion is called inertia.

ii. The mass of an object is a measure of its inertia.

iii. SI unit of mass is kg.

The force acting on a particle of mass m moving along the X-axis is given by F(x) = kX²- By. Which one of the following is the potential energy of the particle?

If we double the frequency of incident photon on photo-electric material then the:

According to kinetic theory of gases, at absolute zero:

A \(1.0 \mathrm{~kg}\) block collides with a horizontal light spring of force constant \(2 \mathrm{~N} / \mathrm{m}\). The block compresses the spring \(4 \mathrm{~m}\) from the rest position. Assuming that the coefficient of kinetic friction between the block and the horizontal surface is\(0.25\), what was the speed of the block at the instant of collision:

In electromagnetic induction, the induced e.m.f. in a coil is independent of:

Identify the logic gate?