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निम्न मे से कौन सी संख्या एक अपरिमेय संख्या है

इनमें से किस राज्य में काली मिट्टी पाई जाती है?

The equivalent capacity between points A and B in figure will be, while capacitance of each capacitor is 3 muF.

The workdone to trun a magnet by 60^(@) from its equilibrium position is W in a uniformthe torque required to hold it in that postion will be

The relation between the refractive index and the critical angle of a medium is

How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced by red light ? Give reason.

Consider the given statement with respect to the figure showing a bar of material placed in an external magnetic filed and choose the correet Statemnet(s).

A block of mass 'm' rests on a rough inclined plane making an angle 30^(@) with the horizontal, The coefficient of static friction between the block and the plane is 0.8. If force of friction on the block is 10N, the mass of the block is (g = 10 m/s^2)

Whichone of the series of hydrogen spectrum is in the visible region?

How the television signals are propagated, derive the formula for the area that a T.V. signal will cover

Two identical taqnks are placed on the two pans of a beam balance. One tank is empty and open to atomosphere. The second tank evacuated and then filled with helium until the two tanks are balanced The pressure of helium will be (Given that rho_(air)=7.5rho_(He)]

At t=0, an inductor of zero resistance is joined to a cell of emf epsilon through a resistance. The current increases with a time constant tau. After what time will the potential difference across the coil be equal to that across the resistance ?

Fertilization involving carting of male gametes by pollen tube is-

A charge Q moves parallel to a very long straight wire carrying a current l as shown. The force on the charge is

The numerical value of the charge on either plates of capacitor 'C' as shown in the figure is

In a potentiometer experiment of a cell of emf 1.25 V gives balancing length of 30 cm. If the cell is replaced by another cell, balancing length is found to be 40 cm. What is the emf of second cell ?

A message signal of frequency omega_m is superposed on a carrier wave of frequency omega_c to get an amplitude modulated wave (AM). The frequency of AM wave will be

A rotating wheel changes angular speed from 1800 rpm to 3000 rpm in 20 s. What is the angular acceleration assuming to be uniform ?

In 1 gram of solid, there are 5 xx 10^(21) atoms. If one electron is removed from every one of 0.1% of atoms of the solid, the charge gained by the solid is

Derive an expression for the impedance of a series LCR, circuit, when an AC voltage is applied to it.

A car completes the first half of its journey with a velocity upsilon_(1) and the rest half with a velocity upsilon_(2). Then the average velocity of the car for the whole journey is :

The frequency response curve ( Fig. ) for the filter circuit used for production of AM wave should be

Mention the SI unit and value of fundamental charge. Write its smaller units.

Derive n= (sin""(A+D)/(2))/( sin ""(A)/(2)) for the prism. Where the symbols have their usual meaning.

A simple harmonic oscillator has an amplitude A and time period T. The time required by it to travel from x=A to x =A//2 is :

In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of 2 m when the cell is shunted by a 4Omega resistance and at 3 m when cell is shunted by a 8Omega resistance. The internal resistance of cell is -

समतल दर्पण के सामने रखी एक घड़ी में 6.00 बजे हैं तो घड़ी के प्रतिबिम्ब में कितना समय दिखेगा ?

On a particular day, the maximum frequency reflected from the ionosphere is 8 MHz. On another day, it was found to increase to 9 MHz. Calculate the ratio of maximum electron densities of the ionosphere on the two days. Point out a plausible explanations for this.

A steady current flows in a long wire. It is bent into a circular lopp of one turn and the magnetic field at the centre of the coil is B. If the same wire is bent into a circular loop of n turns, the magnetic field at the centre of the coil is

Derive a relation for capacitance of a parallel plate capacitor with dielectric slab of thickness t filled between the plates. Or. Write expression for capacitance of a parallel plate capacitor and explain the effect of dielectrics on capacitance.

Two polaroids are oriented with their principal planes making an angle of 60^(@). The percentage of incident unpolarised light, which passes through the system is

A flow of liquid is streamline if the Reynold number is

A particle vibrating simple harmonically has an acceleration of 16 cm s^(-2)when it is at a distance of 4 cm from the mean position. Its time period is

A 25 watt and 100 watt are joined in series and connected to the mains. Which bulb will glow brighter ?

Brown, Red and Orange coloured bands on carbon resistor are followed by silver band. The value of resistor is ..... .

For the hydrogen atom, the energy of radiation emitted in the transition from 4th excited state to 2nd excited state, according to Bohr's theory is

Nichrome and copper wires of same length and area of cross-section are connected in sereis, current is passed through them. Why does the nichrome wire get heated first ?

Which unknown quantity is measured with the help of Wheatstone's Bridge ?

An electrical meter of internal resistance 200 gives a full scale deflection when one milliampere current flows through it. The maximum current, that can be measured by using three resistors of resistance 120 each, in milliamperes is :

The explosion of a fire cracker in the air at a height of 40 m produces a 100 dB sound level at ground below. What is the instantaneous total radiated power? Assume that it radiates as a point source.

(A): It is easier to start a car engine on a warm day than a chilly day (R): with increase in temperature, the internal resistance of the car battery decreases

What kind of lens is an air bubble in water?

Draw a schematic arrangement for winding of primary and secondary coil in a transformer when the two coils are found on top of each other.

If 'O' is at equilibrium then the values of the tension T_(1) and T_(2) are x, y, if 20 N is vertically down. Then x, y are

The linear charge density of 10muCcharge, uniformly distributed on the ring of 1m radius, will be ........

Threshold wavelength for metal is 10,000 Å. If light of wavelength 5461 Å is incident on it, then stopping potential is 1.02 V, then value of Planck's constant is :

Answer the question in one sentence each (Alternatives are to be noted): After what time will the direction of current in an electric supply line of frequency 50 Hz be reversed? Or, Which physical quantity has unit Wbcdot m^(-2)? Is it scalar or vector?

Calculate the impact parameter of 5.0 MeV alpha-particle scattered by 10^(@) when it approaches a gold nuclcus (Z = 79).