List of top Physics Questions asked in MHT CET

Two short bar magnets 'A' and 'B' (having magnetic moments \( M_1 \) and \( M_2 \) respectively) are kept one above the other with their magnetic axes perpendicular to each other. If their resultant at a point on the axis of magnet 'A' is inclined at 45° with the axis of magnet 'A', then the ratio of magnetic moments \( \frac{M_2}{M_1} \) is

Two rain drops falling through air have radii in the ratio 1:2. They will have terminal velocity in the ratio

A heavy mass is attached at one end of a thin wire and whirled in a vertical circle. The chances of breaking the wire are maximum when

Two small drops of mercury each of radius \( R \) coalesce to form a large single drop. The ratio of the total surface energies before and after the change is

Two identical wires are vibrating in unison. If the tension in one of the wires is increased by 2%, five beats are produced per second by the two vibrating wires. The initial frequency of each wire is

In cyclotron, the time taken by an ion to describe semicircular path in a dee is

Resultant of two vectors \( \vec{P} \) and \( \vec{Q} \) is of magnitude \( R_1 \). If the direction of \( \vec{Q} \) is reversed, the resultant is of magnitude \( R_2 \). The value of \( (R_1^2 + R_2^2) \) is \( \cos (\pi - \theta) = - \cos \theta \)

Electron in Hydrogen atom first jumps from third excited state to second excited state and then from second excited state to first excited state. The ratio of the wavelengths \( \lambda_1 : \lambda_2 \) emitted in the two cases respectively is

A body is projected vertically upwards from earth’s surface with velocity \( 2v_e \), where \( v_e \) is escape velocity from earth’s surface. The velocity when body escapes the gravitational pull is

A solid cylinder of mass \( M \) and radius \( R \) rolls down a smooth inclined plane about its own axis and reaches the bottom with velocity \( v \). The height of the inclined plane is

Above the curie temperature the susceptibility of a ferromagnetic substance varies

In meter bridge experiment, to minimize an error due to contact resistance,

Two cars of masses \( m_1 \) and \( m_2 \) are moving in the circles of radii \( r_1 \) and \( r_2 \) respectively. Their angular speeds \( \omega_1 \) and \( \omega_2 \) are such that they both complete one revolution in the same time \( t \). The ratio of linear speed of \( m_1 \) to the linear speed of \( m_2 \) is

A parallel combination of pure inductor and capacitor is connected across a source of alternating e.m.f. \( e \). The currents flowing through an inductor and capacitor are \( i_L \) and \( i_C \) respectively. In this parallel resonant circuit, the condition for currents \( i, i_L, i_C \) (i.e. \( i \) = net r.m.s. current in the circuit) is

A stationary body explodes into two parts of masses \( M_1 \) and \( M_2 \). They move in opposite directions with velocities \( v_1 \) and \( v_2 \). The ratio of their kinetic energies is

A ball of mass \( m \) is attached to the free end of an inextensible string of length \( \ell \). Let \( T \) be the tension in the string. The ball is moving in a horizontal circular path about the vertical axis. The angular velocity of the ball at any particular instant will be

If the dimensions of a physical quantity are given by \( [L^{-1} M^0 T^1] \), then the physical quantity is

The potential differences that must be applied across the parallel and series combination of 3 identical capacitors is such that the energy stored in them becomes the same. The ratio of potential difference in parallel to series combination is

Figure shows three forces \( F_1, F_2, F_3 \) acting along the sides of an equilateral triangle. If the total torque acting at point 'O' (centre of the triangle) is zero then the magnitude of \( F_3 \) is

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 1st overtone and resonates with the fundamental frequency of the pipe. If tension in the string is 50 N, the mass of the string is (speed of sound = 320 m/s)

The unit vector \( (ai + bj) \) is perpendicular to \( (i + j) \). The value of 'b' is

A bar magnet having length $5\,\text{cm$ and area of cross-section $4\,\text{cm}^2$ has magnetic moment $2\,\text{Am}^2$. If magnetic susceptibility is $5 \times 10^{-6}$, the magnetic intensity will be}

A string of length $l$ fixed at one end carries a mass $m$ at the other end. The string makes $\frac{3{2}$ revolutions / second around the vertical axis through the fixed end as shown in figure. The tension $T$ in the string is}

A bucket containing water is revolved in a vertical circle of radius $r$. To prevent the water from falling down, the minimum frequency of revolution required is (where $g$ = acceleration due to gravity)

A simple microscope is used to see the object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?