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Questions asked by maitreyeeroyster
Questions
141
questions
0
answers selected
If in trails, A hits the target 4 times in 5 shots, B hits 3 times in 4 shots and C hits 2 times in 3 trials. Find the probability that:
asked
Oct 20, 2016
1
answer
Find the equation of the hyperbola whose Transverse and Conjugate axes are the x and y axes respectively, given that the length of conjugate axis is 5 and distance between the foci is 13.
asked
Oct 20, 2016
1
answer
After leaving the ground from test a balloon is rising vertically with uniform acceleration of 4 ft / sec2. After 16 seconds a small heavy particle falls freely from the balloon. When the particle will reach the ground? (Apply calculus).
asked
Sep 13, 2016
1
answer
The tangent at a point (a,b) to the curve y = sin x is parallel to the line 2y = x, if a > 0, find b.
asked
Sep 7, 2016
1
answer
Draw the circuit diagram of a full wave rectifier using p-n junction diode and explain its operation. To which factor is the pulsating nature of the output due?
asked
Aug 23, 2016
1
answer
On the x-y plane two point charges +q and –q are placed at positions (o,l) and (o,-l)respectively. Find an expression for the intensity of electric field at a point (o,y) where y>>l. Under what condition does the charge system behave as a dipole and hence express the electric field in terms of the dipole moment of the dipole so formed.
asked
Aug 23, 2016
0
answers
Two capacitors of capacitances 5 F are charged to 16 V and 10V respectively. Find what will be the common potential when they are connected in parallel to each other.
asked
Aug 23, 2016
0
answers
At what height above the surface of the earth is the gravitational potential energy of a body equal to that on the surface of the moon? Assume that the mass of the earth is 80 times that of the moon and the radius of the earth is 4 times that of the moon. Given, Radius of the earth= 6400km.
asked
Aug 23, 2016
0
answers
A cyclist tilts to make an angle theta with level ground as he takes a circular turn of radius r. If the speed of the cycle is v, show that tan theta = rg / v2 .
asked
Aug 23, 2016
1
answer
An ideal gas undergoes a cyclic process (V, P) (3V, P) (V, P) alone straight lines on the p –plane. Calculate the work done in the process.
asked
Aug 23, 2016
1
answer
What will be the kinetic energy of emitted photo-electrons if light of threshold frequency falls on a metal?
asked
Aug 23, 2016
0
answers
Light from a point source placed at the bottom of a rectangular glass slab of thickness 5 cm is internally reflected by the upper surface and a circle of radius 8 cm is formed at the bottom. Find the R.I. of glass
asked
Aug 23, 2016
1
answer
Draw its voltage vs current characteristics in the reverse bias and indicate the breakdown voltage on the characteristics.
asked
Aug 18, 2016
1
answer
Draw the I-V characteristics of a light emitting diode (LED) and explain its working principle
asked
Aug 18, 2016
1
answer
State radioactive decay law. Write down the relation between radius of the nucleus and mass number of an atom. What is isotone? Give an example.
asked
Aug 18, 2016
1
answer
Calculate the speed of light in a medium whose critical angle is 450.
asked
Aug 18, 2016
1
answer
The refracting angle of an equilateral prism is A. Derive an expression for the angle of deviation for a ray of light incident on the refracting surface if the prism. Draw a neat curve to show the variation of deviation with angle of incident ray.
asked
Aug 12, 2016
1
answer
What are coherent sources? Green light of wavelength 5100 incident on a double slit. If the overall separation of 10 fringes in a screen 200 cm away from the slits is 2 cm, find the distance between the slits.
asked
Aug 12, 2016
1
answer
State Amper’s circuital law. Using this law obtain an expression for the intensity of the magnetic field on the axis of a torodal solenoid for a current of i ampere.
asked
Aug 11, 2016
1
answer
Define angle of dip at a place. What will be the value of the angle at the poles and at the equator of the earth? At what place on the earth’s surface will be horizontal component if the earth’s magnetic field and its vertical component be equal?
asked
Aug 11, 2016
1
answer
A900 pF capacitor is charged to 100 V by a battery. How much energy is store in the capacitor?
asked
Aug 11, 2016
1
answer
A900 pF capacitor is charged to 100 V by a battery.
asked
Aug 11, 2016
0
answers
Find the electric flux through a surface of area 50m2 in plane in the electric field
asked
Aug 11, 2016
1
answer
Physisorption is reversible while chemisorption is irreversible. Why?
asked
Jul 8, 2016
1
answer
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3 rd of octahedral voids?
asked
Jul 8, 2016
1
answer
A wire is kept horizontally at a place in the northern hemisphere of the earth. In what direction will force act on the wire due to the vertical component of the earth’s magnetic field, if electric current flows through the wire from south to north?
asked
Jul 4, 2016
1
answer
An ideal gas undergoes a cyclic process (V, P) (3V, P) (V, P) alone straight lines on the p –plane. Calculate the work done in the process.
asked
Jul 4, 2016
0
answers
If a gas expands adiabatically will its temperature increase of decrease?
asked
Jul 4, 2016
1
answer
If a gas expands adiabatically will its temperature increase of decrease? Use first law of thermodynamics to justify your answer.
asked
Jul 4, 2016
1
answer
What type of semiconductor is obtained when Germanium crystal is doped with arsenic
asked
Jul 4, 2016
1
answer
What type of semiconductor is produced if Germanium crystal is doped with Arsenic?
asked
Jul 4, 2016
1
answer
Show that the angular momentum of a particle under the action of the force f = kr is a constant quantity.
asked
Jul 2, 2016
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answers
If the moment of inertia of a solid sphere of mass M and radius R is 2/5 MR2, what will be the radius of gyration?
asked
Jul 2, 2016
2
answers
Does a stationary charge experience any force in a magnetic field?
asked
Jul 2, 2016
1
answer
Write down the name of the physical quantity whose unit is joule/coulomb
asked
Jul 2, 2016
1
answer
Does the principle of conservation of energy always hold in case of superposition of two sound waves?
asked
Jul 2, 2016
0
answers
What are the majority carriers in a p-type semiconductor?
asked
Jul 2, 2016
1
answer
Show that the angular momentum of a particle under the action of the force is a constant quantity.
asked
Jul 2, 2016
0
answers
Show that the angular momentum of a particle under the action of the force is a constant quantity.
asked
Jul 2, 2016
0
answers
When a car takes a circular turn on a level road, which force acts as the centripetal force?
asked
Jul 2, 2016
0
answers
What is the coordination number in a rock salt type structure?
asked
Jun 22, 2016
2
answers
Why the potential inside a hollow is spherical charged conductor constant and has the same value as on its surface? .
asked
Jun 8, 2016
1
answer
How does the frequency of a beam of ultraviolet light get affected when it goes from air into glass? A ray of light incident on an equilateral glass prism shows minimum deviation of 30°.Calculate the speed of light through the glass prism.
asked
Jun 6, 2016
1
answer
A resistor of 200 and a capacitor of 40 F are connected in series to 220 V a.c. source with angular frequency ( ) = 300Hz. calculate the voltages (rms) across the resistor and the capacitor. Why is the algebraic sum of these voltages more than the source voltage? How do you resolve this paradox?
asked
Jun 6, 2016
1
answer
Write the expression for the force acting on a charged particle of charge q moving with velocity in the presence of magnetic field . Show that in the presence of this force. [3] i. The kinetic energy of the particle does not change. ii. Its instantaneous power is zero.
asked
Jun 6, 2016
1
answer
State Ampere’s circuital law. Write the expression for the magnetic field at the centre of a circular coil of radius R carrying a current I. Draw the magnetic field lines due to this coil.
asked
Jun 6, 2016
1
answer
What is remote sensing? Write its two applications.
asked
Jun 6, 2016
1
answer
What does the statement, “natural light emitted from the sun is unpolarized” mean in terms of the direction of electric vector? Explain briefly how plane polarized light can be produced by reflection at the interface separating the two media.
asked
Jun 6, 2016
1
answer
In an ammeter (consisting of a galvanometer and a shunt), 0.5% of the main current passes through the galvanometer. Resistance of the galvanometer coil is G. Calculate the resistance of the shunt in terms of galvanometer resistance, G.
asked
Jun 6, 2016
1
answer
Show graphically how the stopping potential for a given photosensitive surface varies with the frequency of incident radiations.
asked
May 28, 2016
0
answers
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