Physics Test - ...

Visible spectrum lies between:

Find the initial phase angle of the below SHM.

The radius of one arm of a hydraulic lift is four times the radius of the other arm. What force should be applied on the narrow arm to lift \(100 \;kg\)?

Potential gradient is defined as:

The horizontal component of earth's magnetic field at a place is \(3.5 \times 10^{-5} \mathrm{~T}\). A very long straight conductor carrying current of \(\sqrt{2} \mathrm{~A}\) in the direction from South east to North West is placed. The force per unit length experienced by the conductor is__________\(\times 10^{-6} \mathrm{~N} / \mathrm{m}\).

If error in measurement of radius of a sphere is 1%, what will be the error in measurement volume?

Wavelengths of extreme lines of Paschen series for hydrogen is:

The magnetic potential energy stored in a certain inductor is \(25 \mathrm{~mJ},\) when the current in the inductor is \(60 \mathrm{~mA}\). This inductor is of inductance:

In a photoemissive cell, with exciting wavelength λ, the fastest electron has speed v. If the exciting wavelength is changed to \(\frac{3 \lambda}{4}\), the speed of the fastest emitted electrons will be:

There is no change in the volume of a wire due to change in its length on stretching. The Poisson’s ratio of the material of the wire is: