## if are the roots of the equation the equation whose roots are is if are the roots of the equation the equation whose roots are is

Anonymous User Maths Quadratic Equation 27 Apr, 2020 57 views

## If a, b, c  and the quadratic equation has no real roots, then If a, b, c and the quadratic equation has no real roots, then

Anonymous User Maths Quadratic Equation 27 Apr, 2020 56 views

The binding energy per nucleon of deuteron and helium nucleus is 1.1 MeV and 7 MeV respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is

Anonymous User Physics Atomic Physics 27 Apr, 2020 64 views

The wavelengths involved in the spectrum of deuterium are slightly different from that of hydrogen spectrum, because

Anonymous User Physics Atomic Physics 26 Apr, 2020 58 views

In the nuclear fusion reaction, given that the repulsive potential energy between the two nuclei is ~ 7.7 × 10-14 J, the temperature at which the gases must be heated to initiate the reaction is nearly

Note: Boltzmann's constant k = 1.38 × 10-23 J/K

Anonymous User Physics Atomic Physics 26 Apr, 2020 54 views

## A nucleus with Z = 92 emits the following in a sequence:  The Z of the resulting nucleus is A nucleus with Z = 92 emits the following in a sequence: The Z of the resulting nucleus is

Anonymous User Physics Atomic Physics 26 Apr, 2020 58 views

A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, what will be the decay constant (per minute)?

Anonymous User Physics Atomic Physics 26 Apr, 2020 55 views

At a specific instant emission of a radioactive compound is deflected in a magnetic field. The compound can emit

(i) electrons
(ii) protons
(iii) He2+
(iv) neutrons

The emission at the instant can be

Anonymous User Physics Atomic Physics 26 Apr, 2020 58 views

If gE and gM are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan’s oil drop experiment could be performed on the two surfaces, then what would be the ratio Anonymous User Physics Nuclear physics 25 Apr, 2020 53 views

The anode voltage of a photocell is kept fixed. The wavelength of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows

Anonymous User Physics Nuclear physics 25 Apr, 2020 64 views

The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV, and the stopping potential for a radiation incident on this surface 5 V. Where the incident radiation lies?

Anonymous User Physics Nuclear physics 25 Apr, 2020 61 views

A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed (1/2) m away, the number of electrons emitted by photocathode would

Anonymous User Physics Nuclear physics 25 Apr, 2020 59 views

A charged oil drop is suspended in a uniform field of 3 × 104 V/m so that it neither falls nor rises. What will be the charge on the drop?

Note: mass of the charge = 9.9 × 10-15 kg and g = 10 m/s2

Anonymous User Physics Nuclear physics 25 Apr, 2020 57 views

According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal vs the frequency, of the incident radiation gives a straight line whose slope

Anonymous User Physics Nuclear physics 25 Apr, 2020 55 views

An electromagnetic wave of frequency = 3.0 MHz passes from vacuum into a dielectric medium with permittivity = 4.0. Then

Anonymous User Physics Electromagnetic Waves 25 Apr, 2020 59 views

In a Young’s double slit experiment the intensity at a point where the path difference is /6( being the wavelength of light used) is I. If I0 denotes the maximum intensity, II0 is equal to

Anonymous User Physics Wave Optics 24 Apr, 2020 61 views

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? [Note: wavelength of light = 500 nm]

Anonymous User Physics Wave Optics 24 Apr, 2020 58 views

The area bounded by the x-axis, the curve y = f(x) and the lines x=1,x=b,is equal to for all b>1,then f(x) is

Anonymous User Maths 23 Apr, 2020 70 views

## The interval in which the function is decreasing is? The interval in which the function is decreasing is?

Anonymous User Maths 23 Apr, 2020 57 views