Physics Test - ...

If a stone of mass m is rotated in a vertical circular path of radius \(1m\), the critical velocity will be: \(g=9.8 m/s ^{2}\)

By what factor, the electric force between two electrons greater than the gravitational force between them?

The phase difference between the electric field and the magnetic field in the electromagnetic wave is:

Two infinitely long parallel wires carry current \(\mathrm{I}_1=8 \mathrm{~A}\) and \(\mathrm I_2=10 \mathrm{~A}\) in opposite directions. The separation between the wires is \(\mathrm d=0.12 \mathrm{~m}\). Find the magnitude of magnetic field at a point \(\mathrm P\) that is at a perpendicular distance \(\mathrm r_1=0.16 \mathrm{~m}\) and \(\mathrm r_2=0.20 \mathrm{~m}\) respectively from the wires.

The value of alternating emf E in the given circuit will be:

The electric field at a point is:

Three-point masses each of mass \(\mathrm{m}\) are placed at the three corners of an equilateral triangle of side \(x\). Find the resultant force acting on anyone particle at the corner.

Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?

For the given uniform square lamina \(A B C D,\) whose center is \(O\),

An electron is placed in an electric field of intensity \(10^{4}\) Newton per Coulomb. The electric force working on the electron is:

The relation between the electric field intensity E and the linear charge density λ for an infinitely long straight uniformly charged wire is:

Two alpha particles are moving perpendicular to the magnetic field. The radius of the circular path is \(r_{1}\) for the the particle moving with speed \(v_{1}\) and \(r_{2}\) for the particle moving with speed \(v _{2}\). If \(v _{1}\) is greater than \(v _{2}\), then:

The magnetic field intensity at a distance from a long wire carrying current i is 0.4 tesla. The magnetic field intensity at a distance 2r is:

The circuit shown in the figure consists of a battery of emf \(\epsilon=10 \mathrm{~V}\); a capacitor of capacitance \({C}=1.0 \mu {F}\) and three resistor of values \({R}_{1}=2 \Omega, {R}_{2}=2 \Omega\) and \({R}_{3}=1 \Omega\). Initially the capacitor is completely uncharged and the switch \({S}\) is open. The switch \({S}\) is closed at \({t}={0}\).

Study the given figures.

Identify the elements from 1 to 4 and select the option that shows their correct names