List of top Physics Questions asked in BITSAT

Voltage and current in an AC circuit are given by $V = 50\sin(50t)\,\text{V}$ and $i = 50\sin(50t + \frac{\pi}{3})\,\text{mA}$. The power dissipated in the circuit is:

Find the final intensity of light ($I''$), if the angle between the axes of two polaroids is $60^\circ$.

A narrow beam of protons and deuterons, each having the same momentum, enters a region of uniform magnetic field directed perpendicular to their direction of momentum. The ratio of the radii of the circular paths described by them is:

If hydrogen atom, an electron jumps from bigger orbit to smaller orbit so that radius of smaller orbit is one-fourth of radius of bigger orbit. If speed of electron in bigger orbit was $v$, then speed in smaller orbit is:

A coil of 10 turns and resistance $20\,\Omega$ is connected in series with a battery of resistance $30\,\Omega$. The coil is placed with its plane perpendicular to a uniform magnetic field of induction $10^{-2}\,\text{T}$. If it is now turned through an angle of $60^\circ$ about an axis in its plane, the charge induced in the coil is (Area of coil $=10^{-2}\,\text{m}^2$):

A wire X is half the diameter and half the length of a wire Y of similar material. The ratio of resistance of X to that of Y is:

The combination of gates shown below yields:

Let binding energy per nucleon of nucleus be denoted by $E_{bn}$ and radius of nucleus be denoted as $r$. If mass number of nuclei A and B are 64 and 125 respectively then:

The angular size of the central maxima due to a single slit diffraction (a = slit width) is:

Two coaxial non-conducting cylinders of radius $a$ and $b$ are separated by a material of conductivity $\sigma$ and a constant potential difference $V$ is maintained between them by a battery. The current per unit length flowing from one cylinder to the other is:

For the circuit shown, the current is to be measured. The ammeter shown is a galvanometer with resistance $R_g = 60.00\,\Omega$ converted into an ammeter by a shunt resistance $R_s = 0.02\,\Omega$. The value of the current is:

For a CE transistor amplifier, the audio signal voltage across the collector resistance of $2.0\,\text{k}\Omega$ is $2.0\,\text{V}$. Suppose the current amplification factor of the transistor is 100. What should be the value of $R_B$ in series with $V_{BB}$ supply of $2.0\,\text{V}$ if the base current has to be 10 times the signal current?

A nucleus of uranium decays at rest into nuclei of thorium and helium. Then:

The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye piece is found to be 20 cm. The focal length of lenses are:

Resolving power of a telescope will be more, if the diameter of the objective is:

A small block of mass $m$ is kept on a rough inclined surface of inclination $\theta $ fixed in a elevator. The elevator goes up with a uniform velocity $v$ and the block does not slide on the wedge. The work done by the force of friction on the block in time $t$ will be :

An equilateral prism of mass $m$ rests on a rough horizontal surface with coefficient of friction $\mu$. A horizontal force $F$ is applied on the prism as shown. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is:

The load versus elongation graph for four wires is shown. The thinnest wire is:

Three capacitors $C_1 = 1\,\mu\text{F},\; C_2 = 2\,\mu\text{F}$ and $C_3 = 3\,\mu\text{F}$ are connected as shown in the figure. The equivalent capacitance between points A and B is:

Two point dipoles $p\hat{k}$ and $\frac{p}{2}\hat{k}$ are located at $(0,0,0)$ and $(1\,\text{m},0,2\,\text{m})$ respectively. The resultant electric field due to the two dipoles at the point $(1\,\text{m},0,0)$ is:

Electric field in the region is given by $ \vec{E} = \left(\dfrac{M}{x^3}\right)\hat{i}$. The correct expression for the potential in the region is [assume potential at infinity is zero]:

Two particles P and Q describe S.H.M. of same amplitude and same frequency along the same straight line. The maximum distance between the two particles is $2A$. The initial phase difference between the particles is:

A tunnel is dug through the centre of the earth and a ball is released in it. It executes S.H.M. with time period:

In the kinetic theory of gases, which of these statements is/are true? (i) The pressure of a gas is proportional to the mean speed of the molecules. (ii) The root mean square speed of the molecules is proportional to the pressure. (iii) The rate of diffusion is proportional to the mean speed of molecules. (iv) The mean translational kinetic energy of a gas is proportional to its kelvin temperature.

When a string is divided into three segments of length $l_1, l_2,$ and $l_3$, the fundamental frequencies of these three segments are $v_1, v_2,$ and $v_3$ respectively. The original fundamental frequency of the string is: