List of top Physics Questions asked in BITSAT

An electric current \( I \) enters and leaves a uniform circular wire of radius \( r \) through diametrically opposite points. A charged particle \( q \) moves along the axis of the circular wire and passes through its center at speed \( v \). The magnetic force on the particle when it passes through the center has a magnitude of:
A submarine A, traveling at \(17 { m/s}\), is being chased along the line of its velocity by another submarine B, traveling at \(34 { m/s}\). Submarine B sends a sonar signal of \(600 { Hz}\) to detect A and receives a reflected sound of frequency \( v \). The value of \( v \) is: \[ {[Speed of sound in water} = 1500 { m/s}] \]

The stopping potential (\(V_0\)) versus frequency (\(\nu\)) of a graph for the photoelectric effect in a metal is given. From the graph, the Planck's constant (\(h\)) is: 

In the circuit shown, assume the diode to be ideal. When \( V_i \) increases from \(-2V\) to \(6V\), the change in current is (in mA): 

A mosquito O is sitting in front of a glass rod having a spherical end of radius of curvature 40 cm. The image would be formed at: 

In a resonance column, the first and second resonance are obtained at depths 24 cm and 78 cm. The third resonance will be obtained at what depth?
A machine gun fires 300 bullets per minute. If the mass of each bullet is \(10g\) and the velocity of the bullets is \(600 { m/s}\), the power (in kW) of the gun is:
A particle of mass \( m \) is projected with velocity \( v \) at an angle \( \theta \) with the horizontal. At its highest point, it explodes into two pieces of equal mass. One of the pieces continues to move on the original trajectory. The velocity of the second piece is:

Four holes of radius \(5\) cm are cut from a thin square plate of \(20\) cm side and mass \(1\) kg. The moment of inertia of the remaining portion about the \(Z\)-axis is: 
 

In the arrangement shown in the figure, when the switch \( S_2 \) is open, the galvanometer shows no deflection for \( l = 50 \, {cm} \). When the switch \( S_2 \) is closed, the galvanometer shows no deflection for \( l = 0.416 \, {m} \). The internal resistance \( r \) of the 6V cell is: 

Which one of the following graphs represents the variation of electric potential with distance \( r \) from the center of a non-conducting charged sphere of radius \( R \)?
A direct current of \(6A\) is superimposed on an alternating current given by \( I = 10\sin \omega t \) flowing through a wire. The effective value of the resulting current will be:
A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 25 \% , then the rate of flow of liquid will change nearly by:

In the diagram shown below, both the strings AB and CD are made of the same material and have the same cross-section. The pulleys are light and frictionless. If the speed of the wave in string AB is \( v_1 \) and in CD is \( v_2 \), then the ratio \( \frac{v_1}{v_2} \) is: 
 

An electromagnetic wave is propagating along the X-axis. At \( x = 1 \, {cm} \) and \( t = 18 \, {s} \), its electric vector \( |E| = 8 \, {V/m} \). Then the magnitude of its magnetic vector is:
In a Young's double slit arrangement, frings are produced using light of wavelength 4000 Å. One slit is covered by a thin plate of glass of refractive index 1.4 and the other with another glass plate of the same thickness but of refractive index 1.7. By doing so, the central bright fringe shifts to the original sixth fringe from the center. The thickness of the glass plates is:

One mole of an ideal diatomic gas undergoes a process as shown in the figure. The molar specific heat of the gas in the process is: 

Transverse waves of the same frequency are generated in two steel wires A and B. The diameter of A is twice that of B, and the tension in A is half that in B. The ratio of the velocities of the waves in A and B is:
A current through a wire depends on time as $i =\alpha_{0} t +\beta t ^{2}$ where $\alpha_{0}=20 A / s$ and $\beta=8 As ^{-2} .$ Find the charge crossed through a section of the wire in $15 s$.
A brick of mass $2\, kg$ slides down an incline of height 5m and angle $30^{\circ}$. If the coefficient of friction of the incline is $\frac{1}{ 2 \sqrt{3}}$ , the velocity of the block at the bottom of the incline is (Assume the acceleration due to gravity is $10\, m/s^2$)
Kepler?? second law regarding constancy of areal velocity of a planet is a consequence of the law of conservation of
The amplitude of a damped oscillator becomes $\left(\frac{1}{3}\right)rd$ in $2$ seconds. If its amplitude after $6$ seconds is $\frac{1}{n}$ times the original amplitude, the value of $n$ is
A man drags a block through $10\, m$ on rough surface $(\mu = 0.5)$. A force of $\sqrt{3}$ kN acting at $30^{\circ}$ to the horizontal. The work done by applied force is
Water is flowing through a horizontal tube having cross-sectional areas of its two ends beings $A$ and $A$' such that the ratio $A/A$' is $5$. If the pressure difference of water between the two ends is $3 \times 10^5\, N m^{-2}$, the velocity of water with which it enters the tube will be (neglect gravity effects)
A force of $2\hat{i}+3\hat{j}+4\hat{k}$ $N$ acts on a body for $4$ second, produces a displacement of $\left(3\hat{i}+4\hat{j}+5\hat{k}\right)$$m$. The power used is