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A ship of mass 3xx10^(7) kg at rest is pulled by a force of 5xx10^(4) N through a distance of 3m. Neglecting water resistance, the speed of ship is:

An equilateral prism is made of material with refractive index 1.73. A light ray incident at an angle i on it refract and moves parallel to the base of the prism. Find the value of i.

A triangular slave trade took place between Europe, the Americas and:

When a charged particle enters perpendicular to a magnetic field it experiences a force? : Name the force.

संसाधन नियोजन के कितने स्तर होते हैं?

निम्नांकित में कौन प्राकतिक संसाधन नहीं है?

A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is 2/3. Their equivalent focal length is 30 cm. Their individual focal lengths are

Radiations of intensity 0.6Wm^(-2) are incident on a non - reflecting plate. The pressure exerted on the plate by the radiation is

what is the angle between (overset(rarr)P+overset(rarr)Q) and (overset(rarr)P+overset(rarr)Q)?

A coil of resistance 400 Omega is placed in a magnetic field. If the magnetic flux phi(Wb) linked with the coil varies with time t (s) as phi = 50t_2 + 4. The current in the coil att=2 s is

National phenomenan known as Aurora Boriolis is due to

Statement I: In fission the percentage of mass converted into energy is 0.1%. Statement II : In fusion the percentage of mass converted into energy is 100%.

The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer is)

Obtain the equation for bandwidth in Young's double slit experimeet. Conditon for bright fringe (or) maxima

When an electron jumps from the orbit n =2 to n= 4, then wavelength of the radiations absorbed will be (R is Rydberg's constant)

If in p-n junction diode a sinusoidal input signal is applied as shown (##AAK_P7_NEET_PHY_SP7_C29_E01_008_Q01.png" width="80%"> Then the output signal across R_(1) will bw

A heating curve has been plotted for a solid object as shown in the figure. If the mass of the object is 200g, then latent heat of vaporisation for the material of the objects, is [power supplied to the object is constant and equal to 1k W]

Plot a graph showing the variation of coulomb force (F) versus ((1)/(r^(2))) , where r is the distancebetween two charges of each pair of charges: (1mu C, 2 mu C) and (2 mu C, -3 mu C), interpret the graphs obtained.

उत्तल दर्पण द्वारा बना प्रतिबिंब होता है

A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are A_1 and A_2respectively then find their age difference.

Ratio of frequencies in two Bohr's orbit of hydrogen atom is 1:27. the ratio of radius of these orbits is:

Itis foundexperimentallythat13.6 eVenergy is requiedto separatea hydrogenatomintoa protonand anelectron. Computetheorbitalradiusand thevelocityof theelectronin a hydrogenatom .

Find the average drift wire with area of cross section 0.01 cm^2 ,connected across a battery of 2 V carries a current of 0.4 A. Calculate the mobility of electrons if number density of electrons in copper is 7.8 xx10^(28)m^(-3).

The velocity v and displacement r of a body are related by v^2 = kr where k is a constant. What will be velocity after 1 seconds.

Two small balls having equal positive charge Q C on each are suspended by two insulating strings of equal length L metre, from a hook fixed to a stand. The whole setup is taken into space where there is no gravity (state of weightlessness). Then the angle thetabetween the two strings is

A 200cm length of the wire weighs 0.6 gm. If the tension in the wire caused by a 500 gm mass hanged from it. If the approximate wavelength of a wave of frequency 400Hz sent down by it is 2^(n)xx10^(-2)m. Find the value of n (g=9.8m//s^(2))

Find the magnetization of the substance under the conditions of the previous problem.

At absolute zero temperature, the kinetic energy of the molecules

Starting with the same initial conditions, an ideal gas expands from volume V_(1)" to "V_(2) in three different ways. The work done by the gas is W_(1) if the process is purely isothermal, W_(2) if purely isobaric and W_(3) if purely adiabatic. Then SS

A long solenoid has 200 turns per cm and carriesa current i. The magnetic field at its centre is 6.28xx10^(-2)Wb//m^(2). Another long solenoid has 100 turns per cm and it carries a current i/3. The value of the magnetic fieldat its centre is

What is the Brewster angle for air to glass transtion ?(Refractive index of glass=1.5)

If the magnitude of intensity of electric field at a distance x on axial line and at a distance y on equatorial line on a given dipole are equal, then x : y is

Some scientists have predicted that a global nuclear war on the earth would be followed by a severe 'nuclear winter' with a devastating effect on life on earth. What might be the basis of this prediction ?

Suppose that an electric charge moves in a magnetic field in a plane perpendicular to the lines of induction. Prove that the orbital magnetic moment of the circulating charge is directed against the field.

Give the espression for the magnetic induction due tobar magnet on the equitorial line ?

Mention two properties of soft iron due to which it is preferred for making electromagnet.

A condenser of capacity C_1 is charged to a potential V. The electrostatic energy stored in it is U_0 It is connected to another uncharged condenser of capacity C_2 in parallel. The energy dissipated in process is

In the figure shown a current I_(1) is estabilshed in the log straight wire AB. Another wire CD carrying current I_(2) is placed in the plane of the paper. The line joining the ends of this wire is perpendicular to the wire AB. The resultant force on the wire CD is:

The temperature of water in calorimeter is theta and the temperature of surrounding is theta_(c ) ( lt theta). Observation are recorded for temperature difference (theta- theta_0) and time t. The cooling curve is best represented in graph.

How electric current varies with drift velocity .

In the Q.23, the angle of projection with the horizontal is:-

In the last problem calculate the amount of heat dissipated in the resistance assuming that the time constant of the circuit is very small and the discharge process is almost instantaneous.