Physics question and answers for August 31, 2024
- Q A 100 eV electron is fired directly towards a large metal plate having surface charge density 2 x 106 C m 2 The distance from where the electron is projected...
- Q In the given circuit the sources are ideal and have emf s E 4 V and E2 1 V and the resistance are equal to R 100 R 200 and...
- Q 57 A parallel plate air capacitor has capacitance C Now half of the space is filled with a dielec material with dielectric constant K as shown in figure The new...
- Q An electric dipole charges q q masses m each is placed along x axis with its positive charge at 0 0 and the exists in the region Find the angular...
- Q 2 58 A parallel plate air capacitor has capacitance C Half of space between the plates is filled wit dielectric of dielectric constant K as shown in figure The new...
- Q The insulation property of air breaks down at E 3 x 105 V m The maximum charge that can be given to a sphere of radius 3 m is 03...
- Q View in English A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0 5 m in plane perpendicular to magnetic field B The kinetic energy...
- Q A hollow uncharged metallic shell of radius R has a charge q at a distance R 2 from the center Find the charge that will flow into the shell after...
- Q The coil of a dynamo is rotating in a magnetic field The developed induced emf changes and the number of magnetic lines of force also changes Which of the following...
- Q A particle of charge q is released from rest from a point A It moves due to a electrostatic field in this region to a point B If VA and...
- Q A simple harmonic oscillator has an amplitude a and time period T The time required by it to travel from x a tox a 2 is Rad and f Sara...
- Q charge will be same 38 Two plates area s charged to q and 92 9 q are brought closer to form a capacito of capacitance C The potential difference across...
- Q A dielectric sphere of radius R carries a uniform charge density Calculate the electric field at a distance R 2 from the center if the field at a distance 2R...
- Q Two particles carrying equal negative charge are kept fixed at x a and x a Another charged particle of mass m and charge of magnitude q is initially at rest...
- Q If and u represent the permitivity and permeability of vacuum and and u represent the permitivity and permeability of medium the refractive index of the medium is given by THO...
- Q In figure current in the wire between a and b is neglect any resistance of connecting wires E r E r 1 E r 3 3E 4r b E r...
- Q 2 A circular loop of radil magnetic field pointing perpendicular to plane of figure when the current I flows in loop the tension produced in the loop is 1 BIR...
- Q A spring block system undergoes vertical oscillation above a large horizontal non conducting sheet with uniform positive charge The time period of the oscillation T If the block is given...
- Q If the electric flux through a spherical surface containing some point charges is zero then A the electric field is zero everywhere inside the surface B the electric field is...
- Q The figure shows the displacement time graph of a particle executing S H M If the time period of oscillation is 2s the equation of motion of its SHM is...
- Q In the following circuit the output Y for all possible inputs A and B is expressed by the truth table Ao AD Bo A ABY 000 1 0 1 10...
- Q A uniform electric and magnetic fields are produced pointing in the same direction If an electron is projected with some velocity pointing in the same direction The electron s velocity...
- Q Integrated chip IC is an electronic device that contains fa IC A transistors aifGree B resistors afari C transistors and resistors Efter en fari D transistors resistors and capacitors forex...
- Q The electric field E A y j exists in a region where a cylinder of radius r and length L is placed with its curv surfaces parallel to y axis...
- Q Practice problems Electrostatics I Electric field potential Gauss s law Q 1 16 4 1 35 minut A half ring of radius R carries a charge per unit length The...
- Q accelerated through the same potential difference enter in uniform transverse magnetic field and describe circular paths of radii R and R respectively Then the ratio of their masses m m...
- Q View in English A proton of mass 1 67 x 10 27 kg and charge 10 x 10 19 C is projected with a speed of 2 x 106 m...
- Q A proton a deuteron and an a particle enter a magnetic field perpendicular to the field with same velocity What is the ratio of radii of circular paths 1 2...
- Q Orbital velocity of a given artificial satellite moving in a circular orbit just above the earth s surface is Vo The value of orbital velocity for another satellite orbiting at...
- Q A hollow metallic isolated sphere of inner radius R and outer radius 2R is carrying a net charge q Then the charges at the inner and the outer surface of...
- Q A proton of mass 1 67 x 10 27 kg and charge 1 0 x 10 19 C is projected with a speed of 2 x 106 m s 1...
- Q Two particles Y and Z emitted by a radioactive source at P made tracks in a cold chamber as illustrated in the figure A magnetic field acted downward into the...
- Q View in Englis A uniform magnetic field B exists in space A particle of mass m and charge ais projected towards x axis with speed from a point 3 0...
- Q A particle is projected from the gound with an initial speed of v at an agnle 0 with the horizontal The average velocity of the particle between its point of...
- Q View in English When the switch is open in lowermost loop secondary circuit of a potentiometer the balance point length is 60 cm When the switch is closed with a...
- Q A spherical conducting shell of radius R is placed with its center at the origin Two charges Q and Q are placed at a a and a a respectively where...
- Q A proton moving with velocity v is acted upon by electric field E and magnetic field B The proton will move undeflected with constant speed if 1 E is perpendicular...
- Q A coil of inductive reactance 3192 has a resistance of 8 2 It is placed in series with a condenser of capacity reactance 252 The combination is connected to an...
- Q The orbital velocity of electron in the ground state is v If the electron is excited to energy state 0 54eV its orbital velocity will be 3 3 Saf sa...
- Q Choose only incorrect statement from the following A ful A The position of the centre of mass of a system of particles at any moment does not depend upon the...
- Q Five equal resistances each of connected as shown in the Figure A battery of V volts is connected between A and B The current flowing in AFCEB will be A...
- Q A proton a deuteron and an a particle with the same kinetic energy enter a region of uniform magnetic field moving at right angle to field What is the ratio...
- Q The V I graph for a conductor at temperature T and T is shown in the figure T T is proportional to V fag T T 1 T T K...
- Q The moment of inertia of thin square plate ABCD of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is not...
- Q A plano convex lens of refractive index 1 5 and radius of curvature 30 cm is silvered at the curved surface Now this lens had been used to form the...
- Q If two conducting slabs of thickness d and d and thermal conductivity K and K are placed together face to face a shown in figure In the steady state temperatures...
- Q An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally The incident current is 50x103 mA and...
- Q A convave mirror of focal length 200cm is used to obtain the image of the sun which subtends an angle of 30 Then the diameter of the image of the...
- Q Two satellites S and S revolve round a planet in coplanar circular orbits in the same sense Their periods of revolution are 1 hour and 8 hour respectively The radius...
- Q The mass of radium mass number 226 half life 1600 years with an activity of one curie is almost 544 2261600 A B OU O 1 gram 1 8 gram...
- Q A uniform magnetic field B Boj exists in space A particle of mass m and charge q is projected towards x axis with speed v from a point a 0...
- Q Maxwell s modified form of Ampere s Circuital Law is weiter au feu a uda 74 642 A B B dA 0 B dA C fEdi dt dos D dog...
- Q A suitcase is gently dropped on a conveyor belt moving at 3 m s If the coefficient of friction between the belt and the suitcase is 0 5 find the...
- Q A cup of tea cools from 80 C to 60 C in one minute The ambient temperature is 30 C In cooling from 60 C to 50 C it will...
- Q If we shift a body in equilibrium from A to C in a gravitational field via path AC or ABC by force F Then af 2 at C and B...
- Q In a two dimensional motion of particle the particle moves from point A position vector to point B position vector If the magnitudes of these vectors are respectively r 3...
- Q The lengths and radii of two rods made of same material are in the ratios 1 2 and 2 3 respectively If the temperatu difference between the ends for the...
- Q A liquid when heated in a copper vessel and when heated in a silver vessel the apparent coefficient of expansion is C and S respectively If coefficients of linear expansion...
- Q A square is made of four rods of same material one of the diagonal of a square is at temperature difference 100 C then the temperature difference of second diagonal...
- Q Two bodies A and B have thermal emissivities of 0 01 and 0 81 respectively The outer surface areas of the two bodies are the same The two bodies emit...
- Q How many meters of a thin wire are required to manufacture a solenoid of length 1 100cm and inductance L 1mH if the solenoid s cross sectional diameter is considerably...
- Q Two electric bulbs A and B are rated as 60W and 100W If they are connected in parallel to the same source then AB 60 100 DA GA S CAR...
- Q Maxwell s modified form of Ampere s Circuital Law is ter a few da B dA Eo B 3 d4 0 A 5 C E d d dt D E...
- Q A wall consists of alternating blocks with length d and coefficient of thermal conductivity k and k The cross sectional area of the blocks are the same The equivalent coefficient...
- Q Try Yourself 6 Resistivity of a conductor of length and area of cross section A is p If its length is dout and area of cross section is halved then...
- Q The region in space with x y 2 R and z 0 has uniform volume charge density p If electric field at point 0 0 1 is E then the...
- Q A partition divides a container having insulated walls into two compartments I and II The same gas fills the two compartments see Fig The ratio of the number of molecules...
- Q RADIATION STEFEN S LAW AND WEIN S LAW A metallic sphere having radius 0 08 m and mass m 10kg is heated to a temperature of 227 C and suspended...
- Q 4 For the combination shown in figure which one of the given statements is wrong 1 A 0 and B 0 Y 0 2 A 0 and B 1 Y...
- Q Let there be four articles having colours blue red black and white When they are heated together and allowed to cool which article will cool at the earliest RPMT 2007...
- Q In the figure two cells have equal emf E but internal resistance are r and r If the reading of voltmeter is zero then the relation between R r and...
- Q A particle perform SHM of amplitude A along a straight line When it is at a distance of A from its mean position Its kinetic energy gets increased by 2...
- Q XD a 2 c 3 d 4 b A body takes 4 minutes to cool from 100 C to 70 C To cool from 70 C to 40 C it...
- Q If the visible region of the spectrum is taken to be wavelengths longer than 400 nm and shorter than 700 nm the number of lines in the hydrogen spectrum which...
- Q The range of frequency allotted for FM radio is FM fay ang at A 88 to 108 kHz B 88 to 108 MHz C 88 to 108 GHz D 88...
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