List of top Physics Questions asked in MHT CET

An ammeter of resistance \(R\) give a full scale deflection when a current of \(3\ \text{A}\) passes through it. If it is to measure maximum current of \(10\ \text{A}\), the shunt required is
A series combination of 10 capacitors, each of value '\(C_{1}\)' is charged by a source of potential difference '\(4V\)'. When another parallel combination of 8 capacitors, each of value '\(C_{2}\)' is charged by a source of potential difference '\(V\)'. The relation between \(C_{1}\) and \(C_{2}\), so that the energies in the two combinations will be same is
A circular coil having '\(n\)' turns, each of radius '\(r\)' carries a current '\(I\)'. The magnetic field at a distance \(x=\sqrt{3}r\) from its center, along the axis of the coil, is \([\mu _{0}\) = permeability of free space\(]\)
Let '\(A\)' be the cross-sectional area and '\(\rho\)' be the specific resistance of a potentiometer wire. If '\(I\)' is the current passing through the wire, then the potential gradient along the length of the wire is
Four point charges \(-Q\), \(-q\), \(2q\) and \(3Q\) are placed at corners of the square respectively. The relation between \(Q\) and \(q\) for which the potential at the centre of the square is zero, is
A particle starts oscillating simple harmonically from its mean position with time period '\(T\)'. At time \(t=\frac{T}{12}\), the ratio of the potential energy to kinetic energy of the particle is \([\sin 30^{\circ }=\cos 60^{\circ }=0.5,\ \cos 30^{\circ }=\sin 60^{\circ }=\frac{\sqrt{3}}{2}]\)
An organ pipe \(P_{1}\) closed at one end has vibrating air column in its first overtone and another pipe \(P_{2}\) open at both ends has vibrating air column in the third overtone, are in resonance with a given tuning fork. The ratio of the length of pipe \(P_{1}\) to that of \(P_{2}\) is
A particle of mass '\(M\)' and charge '\(q\)' initially at rest is accelerated by a uniform electric field '\(E\)' through a distance '\(D\)' and is then allowed to approach a fixed static charge '\(Q\)' of the same sign. The distance of the closest approach of the charge \(q\) is \([\epsilon _{0}\) = permittivity of free space \(]\)
A string fixed at both the ends, forms a standing wave with node separation of \(5\ \text{cm}\). If the velocity of the wave on the string is \(2\ \text{m/s}\), then the frequency of vibration of the string is
In a pipe closed at one end, air column is vibrating in its third overtone. The air column has
Which one of the following statements is true?
If the kinetic energy of simple pendulum is \(\frac{1}{4}\) of its total energy, then the displacement (\(x\)) and amplitude (\(A\)) are related as
If a non-linear polyatomic gas has \(f\) vibrational modes, the value of \(\gamma =C_{p}/C_{v}\) is (\(C_{p}\) and \(C_{v}\) are specific heats at constant pressure and volume respectively)
For a rigid diatomic molecule, universal gas constant \(R=nC_{p}\) where '\(C_{p}\)' is the molar specific heat at constant pressure. The value of fractional number '\(n\)' is
A monoatomic gas is compressed to \((1/8)\) th of its volume adiabatically. If its initial pressure is \(P_{0}\), then increase in the pressure will be
A certain number of spherical liquid drops of radius \(r\) coalesce to form a single drop of radius \(R\) and volume \(V\). If \(T\) is the surface tension of the liquid which one of the following statement is true for the energy (\(E\)) in the process?
Two capillary tubes of the same diameter are kept vertically in two different liquids whose density are in the ratio \(4:3\). Rise of liquid in both the capillaries is \(h_{1}\) and \(h_{2}\) respectively. Their surface tensions are in the ratio \(6:5\), the ratio of the heights \(\left(\frac{h_{1}}{h_{2}}\right)\) is (Assume that their angles of contact are same)
A small ball of mass \(M\), radius \(R\) and density \(\rho\) moves with terminal velocity \(V\) through a container filled with glycerin. If the density of glycerin is \(\sigma\), the viscous force acting on the ball is (\(g\) = gravitational acceleration)
The rate of dissipation of the heat by a black body at temperature \(T\) is \(Q\). The rate of dissipation of heat by ordinary body of the same area at temperature \(3T\) and having emissivity \(0.25\), will be nearly
On a new linear scale of temperature (called W scale) the freezing and boiling points of water are 35°W and 235°W respectively. The temperature on the new scale, corresponding to 70°C temperature on celsius scale, will be
When a long spring is stretched by \(1\ \text{cm}\), the potential energy stored in the spring is \(U_{1}\). If it is stretched by \(4\ \text{cm}\), the potential energy stored in it is \(U_{2}\). The difference between the energy is
Let '\(R\)' be the radius of the earth. The height '\(h\)' from the surface of the earth where the value of acceleration due to gravity will be half its value on the surface of the earth, is
When a bob of mass \(m\) moves in a horizontal circle of radius \(r\), with uniform velocity having the length of string \(L\), describes a cone of semivertical angle \(\theta\). The centripetal force acting on the bob is given by (\(g\) = gravitational acceleration)
Two particles A and B move in concentric circles of radii \(r_{1}\) and \(r_{2}\) respectively in such a way that position of particles A, B and the centre of the circle (O) always lie on a straight line, the ratio of their angular velocities (\(\omega _{1}:\omega _{2}\)) is
If the errors involved in the measurement of a side and the mass of a cube are \(2\%\) and \(4\%\) respectively, the maximum permissible error in the density of the material is