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Physics · PYQ NEET UG 2016(1)
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Physics · PYQ NEET UG 2016(1)
A particle moves so that its position vector is given by \( \vec{r} = \cos\omega t\,\hat{x} + \sin\omega t\,\hat{y} \), where \( \omega \) is a constant. Which of the following is true?
Read answer →Physics · PYQ NEET UG 2016(1)
A long solenoid has 1000 turns. When a current of \( 4\text{ A} \) flows through it, the magnetic flux linked with each turn of the solenoid is \( 4 \times 10^{-3}\text{ Wb} \). The self-inductance of the solenoid is
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A black body is at a temperature of \( 5760\text{ K} \). The energy of radiation emitted by the body at wavelength \( 250\text{ nm} \) is \( U_1 \), at wavelength \( 500\text{ nm} \) is \( U_2 \) and that at \( 1000\text{ nm} \) is \( U_3 \). Wien's constant, \( b = 2.88 \times 10^6\text{ nmK} \). Which of the following is correct?
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When an \( \alpha \)-particle of mass \( m \) moving with velocity \( v \) bombards on heavy nucleus of charge '\( Ze \)', its distance of closest approach from the nucleus depends on \( m \) as
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A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of \( 800\ \Omega \) is connected in the collector circuit and the voltage drop across it is \( 0.8\text{ V} \). If the current amplification factor is \( 0.96 \) and the input resistance of the circuit is \( 192\ \Omega \), the voltage gain and the power gain of the amplifier will respectively be
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A body of mass \( 1\text{ kg} \) begins to move under the action of a time dependent force \( \vec{F} = (2t\,\hat{i} + 3t^2\,\hat{j})\text{ N} \), where \( \hat{i} \) and \( \hat{j} \) are unit vectors along \( x \) and \( y \) axis. What power will be developed by the force at the time \( t \)?
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To get an output 1 for the following circuit, the correct choice for the input is
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A long straight wire of radius \( a \) carries a steady current \( I \). The current is uniformly distributed over its cross-section. The ratio of the magnetic fields \( B \) and \( B' \) at radial distances \( \frac{a}{2} \) and \( 2a \) respectively, from the axis of the wire is
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The charge flowing through a resistance R varies with time t as \( Q = at - bt^2 \), where a and b are positive constants. The total heat produced in R is
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Two non-mixing liquids of densities \( \rho \) and \( n\rho \) \( (n > 1) \) are put in a container. The height of each liquid is \( h \). A solid cylinder of length \( L \) and density \( d \) is put in this container. The cylinder floats with its axis vertical and length \( pL \) \( (p < 1) \) in the denser liquid. The density \( d \) is equal to
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A square loop \( ABCD \) carrying a current \( i \), is placed near and coplanar with a long straight conductor \( XY \) carrying a current \( I \), the net force on the loop will be
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Given the value of Rydberg constant is \( 10^7\text{ m}^{-1} \), the wave number of the last line of the Balmer series in hydrogen spectrum will be
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A uniform rope of length \( L \) and mass \( m_1 \) hangs vertically from a rigid support. A block of mass \( m_2 \) is attached to the free end of the rope. A transverse pulse of wavelength \( \lambda_1 \) is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is \( \lambda_2 \). The ratio \( \frac{\lambda_2}{\lambda_1} \) is
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The magnetic susceptibility is negative for
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If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is
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At what height from the surface of earth the gravitation potential and the value of \( g \) are \( -5.4 \times 10^7\text{ J kg}^{-2} \) and \( 6.0\text{ ms}^{-2} \) respectively? Take the radius of earth as \( 6400\text{ km} \)
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From a disc of radius \( R \) and mass \( M \), a circular hole of diameter \( R \), whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?
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If the velocity of a particle is \( v = At + Bt^2 \), where \( A \) and \( B \) are constants, then the distance travelled by it between \( 1\text{ s} \) and \( 2\text{ s} \) is
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A capacitor of \( 2\text{ }\mu\text{F} \) is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its storage energy dissipated is
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