List of top Physics Questions asked in BITSAT

A body of mass \( m \) is dropped from a height \( h \). What is its kinetic energy just before it hits the ground?

An ideal gas is compressed isothermally. During this process:

A ball is projected horizontally from the top of a tower with a velocity of \( 10 \text{ m/s} \). If it hits the ground \( 2 \text{ seconds} \) later, what is the height of the tower? (Take \( g = 10 \text{ m/s}^2 \))

A force of \( 20 \text{ N} \) is applied to a \( 5 \text{ kg} \) object at an angle of \( 60^{\circ} \) to the horizontal. What is the horizontal acceleration of the object, ignoring friction?

A particle moves along a straight line such that its position is given by \( x(t) = 3t^2 - t^3 \). What is its velocity at \( t = 2 \) seconds?

A gas undergoes an adiabatic process. During this process:

A light ray enters a glass slab of refractive index \( \mu = 1.5 \) from air. What is the speed of light inside the glass slab? (Speed of light in air \( c = 3 \times 10^8 \text{ m/s} \))

Two charges \( q_1 \) and \( q_2 \) are placed at a distance \( r \). If the distance between them is doubled, the electrostatic force between them becomes:

The elastic potential energy stored per unit volume (energy density) in a stretched string under a longitudinal tension stress $\sigma$ and material Young's modulus $Y$ is expressed as:

Two wires $X$ and $Y$ of the same material have lengths in the ratio $1:2$ and diameters in the ratio $2:1$. If they are subjected to the same stretching force, the ratio of the elongation produced in wire $X$ to that in wire $Y$ ($\Delta L_X : \Delta L_Y$) is:

A particle moves in a circle of radius $R$ such that its linear speed varies with time $t$ as $v = kt$, where $k$ is a positive constant. The angle $\theta$ between the net acceleration vector and the velocity vector at time $t$ is given by:

A wire of length $L$ and cross-sectional area $A$ is made of a material of Young's modulus $Y$. If it is stretched by an amount $x$, the elastic potential energy stored in the wire is:

A particle moves along a circle of radius $R$ with a constant angular acceleration $\alpha$. If the initial angular velocity is zero, the total acceleration of the particle at time $t$ is:

The dimensions of magnetic flux are identical to the dimensions of:

A block of mass $M$ attached to a horizontal spring of spring constant $k$ executes SHM with amplitude $A$. When the block passes through its mean position, a small piece of mass $m$ is dropped vertically onto it and sticks to it. The new amplitude of oscillation is:

The magnetic field at the center of a circular current-carrying loop of radius $R$ is $B_0$. The magnetic field at an axial point at a distance $x = R$ from the center of the loop is:

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now pulled further apart using insulating handles:

A charge $Q$ is placed at the center of an uncharged conducting spherical shell of inner radius $R_1$ and outer radius $R_2$. The surface charge density on the outer surface of the shell is:

Two point charges $+q$ and $-q$ are held fixed at a distance $d$ apart. The net electric potential at a point midway between the two charges and its net field are?

A passenger sitting in a train A moving at 90 km/h observes another train B moving in the opposite direction for 8 s. If the velocity of the train B is 54 km/h, then length of train B is:

The ranges and heights for two projectiles projected with the same initial velocity at angles 42° and 48° with the horizontal are \( R_1, R_2 \) and \( H_1, H_2 \) respectively. Choose the correct option:

Two capillary tubes of radii \(r_1\) and \(r_2\) \((r_1 > r_2)\) are dipped vertically in the same liquid. The rise of liquid in the tubes \(h_1\) and \(h_2\) satisfies:

A fundamental harmonic standing wave is generated in a string fixed at both ends. If the tension in the string is increased by \(21\%\), the percentage change in the fundamental frequency will be:

An ideal gas heat engine operates in a Carnot cycle between \(227^\circ\text{C}\) and \(127^\circ\text{C}\). It absorbs \(6 \times 10^4 \text{ cal}\) of heat at the higher temperature. The amount of heat converted into work is: