List of top Physics Questions on Elasticity asked in MHT CET

In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is $\lambda$ is 'I'. The intensity at a point where the path difference is $\lambda/6$ is $[\cos \frac{\pi}{6} = \frac{\sqrt{3}}{2}][\lambda = \text{wavelength of light}][\cos \pi = -1]$

A $4\mu F$ capacitor is charged to 10 V. The battery is then disconnected and a pure 10 mH coil is connected across the capacitor so that LC oscillations are set up. The maximum current in the coil is

In a Fraunhoffer diffraction, light of wavelength '\(\lambda\)' is incident on slit of width ' d '. The diffraction pattern is observed on a screen placed at a distance ' D '. The linear width of central maximum is equal to two times the width of the slit, then 'D' has value

A thin uniform rod of mass \(m\) and length \(L\) is pivoted at one end so that it can rotate in a vertical plane. The free end is held vertically above pivot and then released. The angular acceleration of the rod when it makes an angle \(\theta\) with the vertical is (consider negligible friction at the pivot) (\(g =\) acceleration due to gravity)

An alternating e.m.f. is given by $e = e_0 \sin \omega t$. In how much time the e.m.f. will have half its maximum value, if e starts from zero ? ($\text{T} = \text{Time Period, } \sin 30^\circ = \frac{1}{2}$)}

A particle of charge \( q \) moves with a velocity \( \vec{v} = a\hat{i} \) in a magnetic field \( \vec{B} = b\hat{j} + c\hat{k} \), where ' a ', ' b ' and ' c ' are constants. The magnitude of force experienced by particle is

A lift is tied with thick iron ropes having mass \( M \). The maximum acceleration of the lift is \( a \) m/s² and maximum safe stress is \( s \) N/m². The minimum diameter of the rope is

Which one of the following is a pair of isotones?

Two springs of equal length and equal area of cross-section are suspended from a rigid support and loaded with same mass. Young’s modulus of two springs is in the ratio $4:3$. When the springs are stretched through some distance and released, they will oscillate with periods $T_1$ and $T_2$. The ratio $T_1 : T_2$ is

A wire of length \( L \), mass \( M \), density \( \rho \), radius \( R \) is stretched by a certain load. If \( r \) and \( \ell \) are the changes in radius and length respectively, then Poisson's ratio is

A sphere of mass \( M \) is attached to one end of a metal wire having length \( L \) and diameter \( D \). It is whirled in a vertical circle of radius \( R \) with angular velocity \( \omega \). When the sphere is at the lowest point of its path, the elongation of the wire is

When a photon enters glass from air, which one of the following quantity does NOT change?

A moving body is covering distances which are proportional to the square of the time. Then the acceleration of the body is

The density and bulk modulus of a metal bar is \( \rho \) and \( K \) respectively. When pressure \( P \) is applied from all sides to that metal bar, the increase in its density is

A small mass \( m \) is suspended at the end of a wire having negligible mass, length \( L \) and cross-sectional area \( A \). The frequency of oscillation for the S.H.M. along the vertical line is ( \( Y \) = Young’s modulus of the wire )

Two wires of same length and material are stretched by the same force. If their masses are in the ratio \( 3 : 4 \), then the ratio of their elongations is

A wire of length \( L \) and radius \( r \) is loaded with a weight \( Mg \). If \( Y \) and \( \sigma \) denote the Young's modulus and Poisson's ratio of the material of the wire respectively, then the decrease in the radius of the wire \( \Delta r \) is given by

A metal rod of length \( L \) and cross-sectional area \( A \) is heated through \( T \) °C. What is the force required to prevent the expansion of the rod lengthwise?
(Y = Young's modulus of material of the rod, \( \alpha \) = coefficient of linear expansion of the rod.)

Two wires A and B having same length and material are stretched by the same force. Their diameters are in the ratio 1 : 3. The ratio of energy density of wire A to that of wire B when stretched, is