List of top Physics Questions asked in MHT CET

When a resistance of \(200\,\Omega\) is connected in series with a galvanometer of resistance G, its range is V. To triple its range, a resistance of \(2000\,\Omega\) is connected in series. The value of G is
A wire is under tension of \(2\) kg wt and a wave is travelling through it with some speed. Tension in the wire is so increased that the wave travels through it with thrice the original speed. The increase in tension is (in kg wt)
A small sphere oscillates simple harmonically in a watch glass whose radius of curvature is \(1.6\) m. The period of Oscillation of the sphere is (Acceleration due to gravity \(g = 10\text{ m/s}^2\))
The number of lines of force originating from a point charge of \(2\times 8.85\times 10^{-9}\) C in a medium of dielectric constant \(10\) is (\(ε_0 = 8.85\times 10^{-12}\) SI unit)
A Pipe open at one end has length \(0.8\) m. At the open end of the tube a string \(0.5\) m long is vibrating in its first overtone and resonates with fundamental frequency of pipe. If tension in the string is \(50\) N, the mass of string is (Neglect end correction) (Speed of sound \(= 320\) m/s)
The fundamental frequency of sonometer wire is \(50\) Hz for some length and tension. If the length is increased by \(25\%\) by keeping the tension same, then the frequency change of second harmonic is
A sonometer wire resonates with \(4\) antinodes between the two bridges for a given tuning fork when \(1\) kg mass is suspended from the wire. Using same fork, when mass M is suspended, the wire resonates producing \(2\) antinodes between the two bridges. (Distance between the bridges as before) The value of M is
A particle executes linear S.H.M. with amplitude \(4\) cm. The magnitude of velocity and acceleration is equal when it is at \(3\) cm from mean position. Time period is
The average force applied on the walls of a closed container depends on temperature (T) as (T is the temperature of an ideal gas)
A monoatomic gas is stored in a thermally insulated container and the gas is suddenly compressed to \((\frac{1}{8})^{th}\) of its initial volume. The ratio of final pressure to initial pressure is
In thermodynamic isobaric process
A particle starts from mean position and performs S.H.M. with period \(6\) second. At what time its kinetic energy is \(50\%\) of total energy? (\(cos45^{\circ} = 1/\sqrt{2}\))
About black body radiation, which one of the following is a WRONG statement?
What should be the angular velocity of earth due to rotation about its own axis so that the weight at equator becomes \((\frac{3}{5})^{th}\) of initial value? (\(g =\) acceleration due to gravity, R = radius of earth)
A soap bubble of radius R is blown. After heating the solution, a second bubble of radius 2R is blown. The work required to blow the second bubble in comparison to that required for the first bubble is
An ordinary body cools from \(4θ\) to \(3θ\) in 't' minutes. The temperature of the body after next 't' minutes is (Assume Newton's law of cooling and room temperature as \(θ\))
Water rises to a height \(3\) cm in a capillary tube. If cross-sectional area of capillary tube is reduced to \(1/3^{rd}\) of its initial area then water will rise to a height of
A black disc has a radius 'R' and wavelength corresponding to the maximum intensity is '\(λ\)'. The emissive power (E) for the different radii and maximum wavelengths is directly proportional to
The excess pressure inside the first soap bubble of radius \(R_1\) is three times that inside the second soap bubble of radius \(R_2\). The ratio of volumes of the first bubble to second bubble is
Two masses \(m_1\) and \(m_2\) moving with velocities \(V_1\) and \(V_2\) in opposite directions collide elastically and after collision \(m_1\) and \(m_2\) move with velocities \(V_2\) and \(V_1\) respectively. The ratio \(\frac{m_2}{m_1}\) is
If the earth suddenly contracts to \((\frac{1}{3})^{rd}\) of its present size without change in its mass, the ratio kinetic energy of the earth after and before contraction will be (Earth is assumed to be a rotating sphere about itself)
A particle performing U.C.M. of radius \(\frac{π}{2}\) m makes 'x' revolutions in time t. Its tangential velocity is
The power (P) is supplied to rotating body having moment of inertia 'I' and angular acceleration '\(α\)'. Its instantaneous angular velocity is
The length of rod is measured by meter scale having least count \(0.1\) cm and diameter is measured by vernier callipers having least count \(0.01\) cm. Length of rod is \(5.0\) cm and radius \(2.0\) cm. The percentage error in the calculated value of the volume is
If transistor having \(α = 0.9\), is used in CE configuration, then for a change of \(0.4\) mA in base current, what will be the change in collector current?