NEET 2016 Phase 2

A 100 \(\Omega\) resistance and a capacitor of 100 \(\Omega\) reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is

Which of the following combinations should be selected for better tuning of an L-C-R circuit used for combination ?

The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is

If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength \(\lambda\). When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be

The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is

A parallel-plate capacitor of area a, plate separation d and capacitance C is filled with four dielectric materials having dielectric constants k1, k2, k3 and k4 as shown in the figure. If a single dielectric material is to be used to have ...

Two identical balls A and B having velocities of 0.5 m s\(-\)1 and \(-\)0.3 m s\(-\)1 respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be :

A rigid ball of mass m strikes a rigid wall at 60o and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be :

A bullet of mass 10 g moving horizontally with a velocity of 400 m s\(-\)1 strikes a wood block of mass 2 kg which is suspended by light inextensible string of length 5 m. As a result, the centre of gravity of the block found to rise a vert...

The potential difference (VA \(-\) VB) between the points A and B in the given figure is

A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. The value of R is

Photons with energy 5 eV are incifent on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping pot...

Electrons of mass m with de-Broglie wavelength \(\lambda\) fall on the target in an X-ray tube. The cutoff wavelength (\(\lambda\)0) of the emitted X-ray is

A uniform magnetic field is restricted within a region of rafius r. The magnetic field changes with time at a rate \({{d\overrightarrow B } \over {dt}}\). Loop 1 of radius R > r encloses the region r and loop 2 of radius R is outside the re...

An electric dipole is placed at an angle of 30o with an electric field intensity 2 \(\times\) 105 N C\(-\)1. It experiences a torque equal to 4 N m. The charge on the dipole, if the dipole length is 2 cm, is

Two identical glass (\(\mu\)g = 3/2) equiconvex lenses of focal length \(f\) each are kept in contact. The space between the two lenses is filled with water \(\left( {{\mu _w} = 4/3} \right)\). The focal length of the combination is

An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is

A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes . In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use. will be

Starting from the centre of the earth having radius R, the variation of g (acceleration due to gravity) is shown by

A satellite of mass m is orbiting the earth (of radius R) at a height h from its surface. The total energy of the satellite in terms of g0, the value of acceleration due to gravity at the earth's surface, is

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas ?

The temperature inside a refrigerator is t2 oC. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be

One mole of an ideal monatomic gas undergoes a process described by the equation PV3 = constant. The heat capacity of the gas during this process is

A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by 60o is W. Now the torque required to keep the magnet in this new position is

In the given figure, a = 15 m s\(-\)2 represents the total acceleration of particle moving in the clockwise direction in a circle of radius R = 2.5 m at a given instant of time. The speed of the particle is

Two cars P and Q start from a point at the same time in a straight line and their positions are represented by
xP(t) = (at + bt2) and xQ(t) = (ft \(-\) t2).
At what time do the cars have the same velocity ?

An electron is moving in a circular path under the influence of a transverse magnetic field of 3.57 \(\times\) 10-2 T. If the value of e/m is 1.76 \(\times\) 1011 C kg\(-\)1, the frequency of revoluation of the electron is

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns wil...

A body of mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down and released, it oscillates with a time period of 3s. When the mass m is increased b...

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100oC, while the other one is at 0oC. If the two bodies are brought into contact, then, assuming no heat loss, the final ...

Three liquids of densities \(\rho\)1, \(\rho\)2  and \(\rho\)3 (with \(\rho\)1 > \(\rho\)2 > \(\rho\)3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact $$\thet...

A rectangular film of liquid is extended from (4 cm \(\times\) 2 cm) to (5 cm \(\times\) 4 cm). If the work done is 3 \(\times\) 10\(-\)4 J, the value of the surface tension of the liquid is

A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling is applicable. The temperature of the body at the end of next 10 minutes will be

Two rotating bodies A and B of masses m and 2m with moments of inertia \({I_A}\) and \({I_B}\) (\({I_B}\) > \({I_A}\)) have equal kinetic energy of rotation. If LA and LB be their angular momenta respectively, then

A light rod of length \(l\) has two masses m1 and m2 attached to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the centre of mass is

A solid sphere of mass m and radius R is rotating about its diameter. A solid cylinder of same mass and same radius is also rotating about its geometrical axis with an angular speed twice that of the sphere. The ratio of their kinetic energ...

For CE transistor amplifier, the aufio signal voltage across the collector resistance of 2 k\(\Omega\) is 4 V. If the current amplification factor of the transistor is 100 and the base resistance is 1 k\(\Omega\), then the input signal vo...

What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1 ?

The given circuit has two ideal diodes connected as shown in the figure. The current flowing through the resistance R1 will be

Planck's constant (h), speed of light in vacuum (c) and Newton's gravitional constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?

The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio \({{{I_{max}} - {I_{\min }}} \over {{I_{max}} + {I_{min}}}}\) will be

A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aparture is illuminated normally by a parallel beam of wavelength 5 \(\times\) 10\(-\)5 cm. The distance of the first dark band o...

Three sound waves of equal amplitudes have frequencies (n \(-\) 1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be

The second overtone of an open organ pipe has the same frquency as the first overtone of a closed pipe L metre long. The length of the open pipe will be

A particle moves from a point \(\left( { - 2\widehat i + 5\widehat j} \right)\) to \(\left( {4\widehat j + 3\widehat k} \right)\) when a force of \(\left( {4\widehat i + 3\widehat j} \right)\) N is applied. How much work has been done by th...