Physics Test - ...

Calculate the Coulomb force between 2 alpha particles separated by \(3.2 \times 10^{-15} {~m}\).

A body of mass 10kg at rest is acted upon simultaneously by two forces 4N and 3N at right angles to each other. The kinetic energy of the body at the end of 10 s is:

A satellite orbits the earth in a circle of radius 8000 km. At that distance from the earth, the velocity of the satellite is (g = 9.8 m/s²)

If two different particles of same initial velocity and charge fall perpendicularly into a uniform magnetic field and follows a circular path, then:

Which of the following option is correct regarding energy band of electrons?

Two charges, one of \(+5 \mu {C}\) and another of \(-5 \mu {C}\) are kept \(1 {~mm}\) apart. Calculate the dipole moment.

In the equation \(A=3 B C^{2}\), A and \(C\) have dimensions of capacitance and magnetic induction respectively. In \(M K S Q\) system, the dimensional formula of \(B\) is:

Which of the following statements are true regarding Biot – Savart’s law?

(i) According to Biot – Savart’s law magnetic field is directly proportional to the length of the element.

(ii) Biot – Savart’s law deals with electric field.

(iii) Magnetic field is directly proportional to current through the conductor.

A circular road of 1000 m radius has a banking angle of 45°, the maximum safe speed of a car having a mass of 2000 kg will be (if the coefficient of friction between tyre and road is 0.5):

Keeping voltage constant, if more lamps are put into a series circuit, the overall current in the circuit:

Two point charges \(- q\) and \(+ q\) are placed at a distance of \(L\), as shown in the figure.

The magnitude of electric field intensity at a distance \(R(R >>L)\) varies as :

The output of a NAND gate is 0 if the inputs are ________.

For a photosensitive surface, work function is \(3.3 \times 10^{-19} \mathrm{~J}\). Taking plank's constant to be \(6.6 \times 10^{-34} \mathrm{Js}\). Find threshold frequency.

A charged particle of charge q and mass m is moving in a magnetic field B with a velocity v. If the velocity is perpendicular to the magnetic field then the acceleration of the charged particle will be: