List of top Physics Questions asked in BITSAT

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 susceptibility of a magnetism at $300\, K$ is $1 .2 � 10^{-5}$. The temperature at which the susceptibility increases to $ 1 .8 � 10^{-5}$ is
The work done in blowing a soap bubble of surface tension $ 0.06 ??Nm^{-1}$ from $2 \,cm$ radius to $5 \,cm$ radius is.
A spherically symmetric gravitational system of particles has a mass density $ \rho = \begin{cases} \rho_0 & \text{for} \; r \le R \\ 0 & \text{for} \; r > R \end{cases}$ where $r_0$ is a constant. A test mass can undergo circular motion under the influence of the gravitational field of particles. Its speed $V$ as a function of distance $r (0 < r < \infty) $ from the centre of the system is represented by
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 in the figure. 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 -
Two particles $P$ and $Q$ describe S.H.M. of same amplitude a, same frequency $f$ along the same straight line. The maximum distance between the two particles is $a \sqrt{2}$ The initial phase difference between the particle is
The velocity and acceleration vectors of a particle undergoing circular motion are $\vec{ v }=2 \hat{ m } / s$ and $\vec{ a }=2 \hat{1}+4 \hat{ j } m / s ^{2}$ respectively at an instant of time. The radius of the circle is
A thermodynamical system is changed from state $(P_1, V_1)$ to $(P_2, V_2)$ by two different processes, the quantity which will remain same will be
A bob is hanging over a pulley inside a car through, a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration '$a$' directed horizontally as shown in figure. Other end of the string is pulled with constant acceleration '$a$' vertically. The tension in the string is equal to -
A light inextensible string that goes over a smooth fixed pulley as shown in the figure connects two blocks of masses $0.36\, kg$ and $0.72\, kg$. Taking $g =10\, m / s ^{2}$, find the work done (in joules) by the string on the block of mass $0.36\, kg$ during the first second after the system is released from rest.
A Carnot's heat engine works between the temperatures $427^{\circ} C$ and $27^{\circ} C$. What amount of heat should it consume per second to deliver mechanical work at the rate of $1.0\, kW$ ?
A cube is subjected to a uniform volume compression. If the side of the cube decreases by $2\%$ the bulk strain is
A disc is performing pure rolling on a smooth stationary surface with constant angular velocity as shown in figure. At any instant, for the lower most point of the disc -
A ball whose density is $0.4\times 10^3 kg/m^3$ falls into water from a height of $9\, cm$. To what depth does the ball sink ?
A particle of mass ' $m$ ' is projected with a velocity $v$ making an angle of $30^{\circ}$ with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height ' $h$ ' is
The minimum velocity (in $ms^{-1}$) with which a car driver must traverse a flat curve of radius $150\, m$ and coefficient of friction $0.6$ to avoid skidding is
Two identical capacitors, have the same capacitance $C$. One of them is charged to potential $V_{1}$ and the other to $V_{2}$. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is
Two parallel conductors carry current in opposite directions as shown in figure. One conductor carries a current of $10.0\, A$. Point $C$ is a distance $\frac{d}{2}$ to the right of the $10.0\, A$ current. If $d =18\, cm$ and $I$ is adjusted so that the magnetic field at $C$ is zero, the value of the current $I$ is
When light is refracted, which of the following does not change ?
The temperature of an ideal gas is increased from $27^{\circ} C$ to $127^{\circ} C$, then percentage increase in $v_{r m s}$ is
Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area $A=10\, cm ^{2}$ and length $=20\, cm$. If one of the solenoid has $300$ turns and the other $400$ turns, their mutual inductance is $\left(\mu_{0}=4 \pi \times^{-7} Tm A^{-1}\right)$
What should be the characteristic of fuse wire?
The Bohr orbit radius for the hydrogen atom $(n=1)$ is approximately $0.530\,�$. The radius for the first excited state $(n=2)$ orbit is (in $�$ )
There is a shell of mass $M$ and density of the shell is uniform. The work done to take a point mass from point $A$ to $B$ is $[A B=r]$
Two rings of radius $R$ and $nR$ made of same material have the ratio of moment of inertia about an axis passing through center is $1 : 8$. The value of $n$ is