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Physics · PYQ NEET UG 2016(1)
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Physics · PYQ NEET UG 2016(1)
The molecules of a given mass of a gas have r.m.s velocity of \( 200\text{ ms}^{-1} \) at \( 27^\circ\text{C} \) and \( 1.0 \times 10^5\text{ Nm}^{-2} \) pressure. When the temperature and pressure of the gas are respectively, \( 127^\circ\text{C} \) and \( 0.05 \times 10^5\text{ Nm}^{-2} \), the r.m.s. velocity of its molecules in \( \text{ms}^{-1} \) is
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Consider the junction diode as ideal. The value of current flowing through AB is
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A potentiometer wire is \( 100\text{ cm} \) long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at \( 50\text{ cm} \) and \( 10\text{ cm} \) from the positive end of the wire in the two cases. The ratio of emf's is
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A uniform circular disc of radius \( 50\text{ cm} \) at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of \( 2.0\text{ rad s}^{-2} \). Its net acceleration in \( \text{ms}^{-2} \) at the end of \( 2.0\text{ s} \) is approximately
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What is the minimum velocity with which a body of mass \( m \) must enter a vertical loop of radius \( R \) so that it can complete the loop?
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An inductor \( 20\text{ mH} \), a capacitor \( 50\text{ }\mu\text{F} \) and a resistor \( 40\text{ }\Omega \) are connected in series across a source of emf \( V = 10\sin 340t \). The power loss in A.C. circuit is
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A disc and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?
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A astronomical telescope has objective and eyepiece of focal length \( 40\text{ cm} \) and \( 4\text{ cm} \) respectively. To view an object \( 200\text{ cm} \) away from the objective, the lenses must be separated by a distance
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Match the entries of Column-I with Column-II, where \( m \) is the magnification produced by the mirror: Column-IColumn-II i. \( m = -2 \)a. Convex mirror ii. \( m = -\frac{1}{2} \)b. Concave mirror iii. \( m = +2 \)c. Real image iv. \( m = +\frac{1}{2} \)d. Virtual image
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The ratio of escape velocity at earth (\( v_e \)) to the escape velocity at a planet (\( v_p \)) whose radius and mean density are twice as that of earth is
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Two identical charged spheres suspended from a common point by two massless strings of lengths \( l \), are initially at a distance \( d (d \ll l) \) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity \( v \). Then \( v \) varies as a function of the distance \( x \) between the spheres, as
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An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is \( 50\text{ cm} \). The next larger length of the column resonating with the same tuning fork is
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A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is (Latent heat of ice is \( 3.4 \times 10^5 \) J/kg and \( g = 10 \) N/kg)
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A refrigerator works between \( 4^\circ\text{C} \) and \( 30^\circ\text{C} \). It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 joules]
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A small signal voltage \( V(t) = V_0 \sin \omega t \) is applied across an ideal capacitor \( C \)
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A car is negotiating a curved road of radius \( R \). The road is banked at an angle \( \theta \). The coefficient of friction between the tyres of the car and the road is \( \mu_s \). The maximum safe velocity on this road is
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In a diffraction pattern due to a single slit of width \( a \), the first minimum is observed at an angle \( 30^\circ \) when light of wavelength \( 5000\ \text{Å} \) is incident on the slit. The first secondary maximum is observed at an angle of
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A siren emitting a sound of frequency \( 800\text{ Hz} \) moves away from an observer towards a cliff at a speed of \( 15\text{ ms}^{-1} \). Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air \( = 330\text{ ms}^{-1} \))
Read answer →Physics · PYQ NEET UG 2016(1)
The intensity at the maximum in a Young's double slit experiment is \( I_0 \). Distance between two slits is \( d = 5\lambda \), where \( \lambda \) is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance, \( D = 10d \)?
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A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then
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A particle of mass \( 10\text{ g} \) moves along a circle of radius \( 6.4\text{ cm} \) with a constant tangential acceleration. What is the magnitude of this acceleration, if the kinetic energy of the particle becomes equal to \( 8 \times 10^{-4}\text{ J} \) by the end of the second revolution after the beginning of the motion?
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An electron of mass \( m \) and a photon have same energy \( E \). The ratio of de-Broglie wavelengths associated with them is (\( c \) being velocity of light)
Read answer →Physics · PYQ NEET UG 2016(1)
