List of top Physics Questions asked in MET

If \(\alpha\) and \(\beta\) are the current gain in the CB and CE configurations respectively of the transistor circuit, then \(\dfrac{\beta - \alpha}{\alpha\beta}\) is
In a gas, two waves of wavelengths 1 m and 1.01 m are superposed and produce 10 beats in 3 s. The velocity of sound in the medium is
The surface area of a black body is \(5 \times 10^{-4}\) m\(^2\) and its temperature is 727\(^\circ\)C. The energy radiated by it per minute is (\(\sigma = 5.67 \times 10^{-8}\) J/m\(^2\)-s-K\(^4\))
Water rises in a capillary tube to a height \(h\). Choose false statement regarding capillary rise from the following.
Force between two identical charges placed at a distance of \(r\) in vacuum is \(F\). Now a slab of dielectric of dielectric constant 4 is inserted between the charges. If the thickness of the slab is \(r/2\), then the force between the charges will become
Two identical cells whether connected in parallel or in series gives the same current when connected to an external resistance 1.5 \(\Omega\). Find the value of internal resistance of each cell.
Three blocks of masses \(m_1\), \(m_2\) and \(m_3\) are connected by massless strings as shown on a frictionless table. They are pulled with a force \(T_3 = 40\) N. If \(m_1 = 10\) kg, \(m_2 = 6\) kg and \(m_3 = 4\) kg, the tension \(T_2\) will be}
A string of density \(7.5\) g cm\(^{-3}\) and area of cross-section \(0.2\) mm\(^2\) is stretched under a tension of 20 N. When it is plucked at the mid-point, the speed of the transverse wave on the wire is
Two identical air core capacitors are connected in series to a voltage source of 15 V. If one of the capacitors is filled with a medium of dielectric constant 4, the new potential across this capacitor is
Two springs are connected to a block of mass M placed on a frictionless surface. If both the springs have a spring constant k, then the frequency of oscillation of the block is:
A mixture of two gases is contained in a vessel. The gas 1 is monoatomic and gas 2 is diatomic and the ratio of their molecular masses $M₁/M₂ = 1/4$. What is the ratio of root mean square speeds of the molecules of two gases?
Two particles of charges $+e$ and $+2e$ are at 16 cm away from each other. Where should another charge q be placed between them, so that the system remains in equilibrium?
In Young’s double slit experiment, when wavelength used is 600 Å and the screen is 40 cm from the slits, then the fringes are 0.012 cm apart. What is the distance between the slits?
In a photoemissive cell with exciting wavelength $λ$, the fastest electron has a speed $v$. If the exciting wavelength is changed to $\frac34λ$, then the speed of the fastest emitted electron will be
A block of wood of side 40 cm floats in water in such a way that its lower face is 5 cm below the free surface of water. What is the weight of the block?
An iron cube floats in a vessel containing mercury at $20^\circ C$. If the temperature is increased by $100^\circ C$, then the cube will float
A stone is projected from the ground with velocity 50 m/s at an angle 30° with horizontal. It crosses a wall after 3 s. How far beyond the wall the stone will strike the ground? ($g = 10 m/s²$)
The wavelength of incident light falling on a photosensitive surface is changed from 2000 Å to 2100 Å. The corresponding change in stopping potential is
Fifty six tuning forks are arranged in a series such that each fork gives 6 beats per second with the preceding one. Assuming the frequency of the last fork to be double of the first fork, the frequency of the last fork should be
A copper ball of radius r is moving with a uniform velocity v in the mustard oil and the dragging force acting on the ball is F. The dragging force on the copper ball of radius 2r with uniform velocity 2v in the mustard oil is
In photoelectric effect, the photo current
The path difference between two waves $y₁ = a₁ \sin\left(ω t - \frac2π xλ\right)$ and $y₂ = a₂ \cos\left(ω t - \frac2π xλ + φ\right)$ is
In the system shown in figure $M₁ > M₂$ and pulley and threads are ideal. System is held at rest by thread BC. Just after thread BC is burnt.
A thin walled glass sphere of radius 2.5 cm is filled with water. An object (O) is placed at 7.5 cm from the surface of the sphere. Neglecting the effect of glass wall, at what distance the image (I) of the object, measured from the centre of sphere is formed?
Two junction diodes one of germanium (Ge) and other of silicon (Si) are connected as shown in figure to a battery of emf 12 V and a load resistance 10 k$Ω$. The germanium diode conducts at 0.3 V and silicon diode at 0.7 V. When a current flows in the circuit, then the potential of terminal Y will be