Physics Test - ...

A truck accelerates from speed v to 2v. Work done during this is process of acceleration is:

Two planets orbit the Sun in circular orbits, with their radius of orbit as \(\mathrm{R}_{1}=\mathrm{R}\) and \(\mathrm{R}_{2}=4 R\). Ratio of their periods \(\left(\frac{T_{1} }{ T_{2}}\right)\) around the Sun will be:

Which one of the following statements is not correct for light rays?

Dimensions of stress are:

The meter bridge is used to:

A square coil of side 20 cm consists of 30 turns and carries a current of 10 A, then the magnetic moment of the coil is:

The energy band diagram of a 3 terminal device is shown, the type of junction is:

Kepler's II law is a consequence of:

______ is the dimensional formula for \(\epsilon_{0}\)?

The magnetic field \(\overrightarrow{dB}\) at a point \(\vec{r}\) distance away from a current element \(\overrightarrow{dl}\) carrying a current \(I\) is given by:

Mayank is doing an experiment in the lab with a bob of mass 10 Kg and a string of 6 m. He tied a string with the laboratory roof and another end with the bob. He then tied another string at 3 m below the roof with the previous one as shown in the figure. Find the tension T₁ in the string? g =10 m/s²

The graph shows variation of stopping potential \(\mathrm{V}_{0}\) versus frequency of incident radiation v for two photosensitive metals A and B. Which of the two metals has higher threshold frequency?

An n-p-n transistor can be considered to be equivalent to two diodes, connected. Which of the following figures is the correct one?

What is the value of instantaneous displacement current in the free space between parallel plate capacitor of capacitance \(1 \mu F\) and the rate of changing potential difference maintain between plates is \(10^{6} {~V} / {s} ?\)