Physics question and answers for January 29, 2024
- Q A deuteron and an a particle are placed in an electric field The force acting on them are F and F and their accelerations are a and a respectively then...
- Q viii When the distance between two equal charges is decreased to half and their magnitude of charge also decreased to half the force between them a Remains unchanged c becomes...
- Q 4 1 A primitive model for an atom consists of a point nucleus q surrounded by a uniformly charged spherical cloud q of radius a Fig 4 1 Calculate the...
- Q 48 A uniformly charged rod of length 4 cm and line shown charge density 30 C m is placed as figure Calculate the x component of electric fi at point...
- Q Four particles A B C and D of masses mA MB mc and mp respectively follow the paths shown in the figure in a uniform magnetic field Each particle moving...
- Q 55 A cylindrical region of radius R is filled with a uniform magnetic field B as shown in the figure A metal wire AB of length L is placed inside...
- Q An electric dipole has fixed dipole moment P 3i j Cm It is subjected to an electric field E 2i 2 3j V m the magnitude of net torque experienced...
- Q solid conducting sphere having a charge Q is surrounded by an uncharged conducting hollow e shell is now connected to earth then which of the following statements will be correct...
- Q There are 27 drops of a conducting fluid Each has a radius r and they are charged to a potential Vo These are combined to form a bigger drop Its...
- Q Initially sphere A has charge of 50e and sphere B has a charge of 20e The spheres are made of conducting material and are identical in size If the spheres...
- Q If the potential at infinity is assumed to be zero then the electric potential at points A and B due to a point charge is 40 V and 35 V...
- Q Find electric field intensity at the centre of the square unit positive charge is pla ce and the corners have 1 coulomb 1 coulomb 1 coulomb 1 coulomb respe ctively...
- Q The electric fields of two plane electromagnetic plane waves in vacuum are given by E E cos wt kx and E Ekcos wt ky At t 0 a particle of...
- Q The work done in moving a charge of 1 C on the surface of a conducting sphere from one point to the diametrically opposite point is Assume charge on shell...
- Q A spherical cloud of charged particles of radius Ro 1 km produces a known electric field intensity inside the cloud R Ro given as E R R N C Calculate...
- Q A metallic block has no potential difference applied across it then the mean velocity of free electrons is T absolute temperature of the block Choose only 1 answer A Proportional...
- Q the dial A charge 109 C is located at the origin in free space another charge Q at 2 0 0 If the X component of the electric field at...
- Q A cavity of radius A is taken out from a uniformly charged solid sphere with charge density p and radius 2R as shown Consider four points 1 2 3 4...
- Q A ring of radius rhas given a charge Q and uniformly distributed over its length If a charge q is placed at the centre The electric potential energy of the...
- Q Three charges q q and q are placed at th vertices of an equilateral triangle as shown in figure The net electric field at centroid of triangle is 9 1...
- Q Q 14 Two infinite planes each with uniform surface charge density o are kept in such a way that the angle between them is 30 The electric field in the...
- Q In the figure shown below the conducting shell A having radius R is given charge Qinitially The shell A is connected to shell B of radius 2R via switch S...
- Q Each of the following figures shows electric field vectors at two points A and B in an electric field In which figure or figures can the illustrated field be created...
- Q Three charges and q are placed at the 2 corner of an equilateral triangle of side a as shown in the figure The net electric dipole moment of the system...
- Q a State the aspects in which a ring distribution system outperforms than the radial systems b Justify that the minimum potential is at the mid point for a uniformly loaded...
- Q The figure shows three large parallel sheets carrying uniform charge densities of a1 5 00 nC m 02 10 0 nC m and 03 5 00 nC Which of the...
- Q Two cells of equal e m f E but of different internal resistances r and r are connected in parallel and the combination is conneted with an external resistance R...
- Q An electric dipole is placed at the centre of a sphere Mark the correct options 1 The electric field is zero at every point of the sphere 2 The flux...
- Q A dipole is placed in uniform electric field such 36 that potential energy of dipole is minimum U The work done by external agent in rotating a dipole by 180...
- Q The potential at a point in space due to a surrounding charge distribution is V x y Z V then the electric field at point 1 2 3 is 21...
- Q Q4 Two small spheres each having the charge Q are suspended by insulating threads of length L from a hook This arrangement is taken in space where there is no...
- Q Two insulated charged copper spheres A and B of identical size have charges qa and 3q respectively When they are brought in contact with each other and then separated what...
- Q 10 m s 60 A small sphere of mass m 0 6 kg carrying positive charge q 80 C is connected with a light flexible and inextensible string of length...
- Q 31 Two point charges q and 2q are placed at the vertices B and C of an equilateral triangle ABC of side a as given in the figure Obtain the...
- Q 34 A positively charged sphere of mass m 5 kg is attached by a spring of force constant k 10 N m The sphere is tied with a thread so...
- Q Paragraph for Question No 9 to 11 A charged particle is suspended at the centre of two thin concentric spherical charged shells made of non conducting material Figure A shows...
- Q Two large identical plates are placed in front of each other at x d and x 2d as shown in the figure If charges on plates are Q and 50...
- Q Paragraph for Question no 24 and 25 Suppose the earth is a negatively charged sphere of radius R and charge Q Neglect gravity to answer the following questions 24 Minimum...
- Q 15 Consider a spherical volume which has uniform charge density p from x R to x 2R There is no charge from x 0 to x R and from x...
- Q Two identical copper spheres carrying char ges Q and 9Q separated by a certain dista nce has attractive force F if the spheres are allowed to touch each other and...
- Q Two particle each of mass m and charge q are attached to the two ends of a light rigid rod of length 2R The rod is rotated at constant angular...
- Q A cuboid is of dimension a x a b Charge q is placed at the centre of edge having length b If flux through face ABCD is then select the...
- Q Two equilateral triangular plates are placed parallel to each other The separation between them is much smaller than their linear dimensions and they overlap each other completely One of them...
- Q Two parallel half plane are uniformly charged with surface charge density to and Find the magnitude and direction of the electric field E at the point Plocated at a heigh...
- Q A point charge Q is placed at the centre of an isolated conducting shell of radius R Find the electrostatic potential energy stored outside the spherical shell if the shell...
- Q Two identical metal spheres carry charges of q and 2q respectively When the spheres are separated by a large distance r the force between them is F Now the spheres...
- Q Figure shows three small spheres that have charges of equal magnitudes whose sign are shown and are at rest on a frictionless surface Spheres y and z are fixed in...
- Q A sphere has charge volume p Po 1 where x is distance from the centre and R is its radius The electric field inside the sphere at a distance x...
- Q Q3 Aswer one only A Three charges are at the corners of an equilateral triangle as shown in Figure below Calculate the 3rd charge and its force 57 q1 3...
- Q B Consider a point charge q placed at the origin and another point charge 2q placed at a distance of 9 m from the charge q Determine the point between...
- Q Two identical point charges are placed at separation of L P is a point on the line joining the charges at a distance x from the charge which is on...
- Q Three identical small balls each of mass 0 1 g are suspended at one point on silk thread having a length of 1 20cm What charges should be imparted to...
- Q 1 Two identical particles A and B each having charge q when release free space with initial separation ro between them their separa becomes double in time to How long...
- Q Two spherical conducting shells of radii R and 2R is filled with material of resistivity p The strength 3R 2 of electric field at r from centre when a battery...
- Q In a potentiometer of ten meter length an unknown emf voltage source is balanced at 60cm length of the potentiometer wire while a 3volt battery is balanced at 45cm length...
- Q Consider a conductor with a spherical cavity as shown There is a charge Q placed outside and a negative charge q inside the cavity to the left of the centre...
- Q charged particle q is placed at a distance d from the center of neutral conducting sphere of radius R d then in static condition at the center of sphere magnitude...
- Q Two identical beads each have a mass m and charge q When placed in a hemispherical bowl of radius R with frictionless non conducting walls the beads move and at...
- Q A sphere of radius R has uniformly distributed charge density p There is a spherical cavity as shown in the figure has centre at C It is given that AB...
- Q A conducting sphere of radius R and charge Q is placed near a uniformly charged non conducting infinitely large thin plate having surface charge density on front surface only Assume...
- Q When a charge q is kept at a 0 0 the electric field vector at 0 b 0 is a bj Now another charge 2q is also kept at a...
- Q An electron is projected into a charged field of strength 2000 N C with initial 10 m sec perpendiculars to the field What is the ratio of the electric force...
- Q 26 Two point charges A and B having charges Q and Q respectively are placed at certain distance apart and force acting between them is F If 25 charge of...
- Q Consider a spherical symmetric distribution of charge The centre of symmetry is at O Electric flux linked with a spherical Gaussian surface of radius r and centered at O is...
- Q Two point charges separated by a distance L 4 00 cm are fixed on the x axis as shown in the figure q1 7 00 nC and q2 2 92...
- Q Two point charges q 92 when kept at a certain distance apart exert force F on each other If q is increased by 50 q is decreased to 20 distance...
- Q 15 Gravitational potential of a ring of radius R mass M on the axis at a distance x from center is given by V x 1 2 3 GM R...
- Q Sphere is charged miy move from A to B along diameter AB then electri field AX B 1 First increases then decreases 2 First decreases then increases 3 Remains same
- Q 3 Charges 2Q and Q are placed as shown in figure The point at which electric field intensity is zero will be NCERT 2Q Q a somewhere b somewhere E...
- Q A conductor having uniform linear charge density Is placed in circular form in 3 quadrants with different polarities as shown in the figure Let E be the electric field at...
- Q An electric point charge q 6 C is placed at origin of x y Co ordinate axis Calculate electric potential due to the charge at point P 12m 16m in...
- Q Two spheres M and N having charge q and q2 are kept q1 at some distance from each other q amount of charge is taken from the sphere M and...
- Q A leaf electroscope is a simple apparatus to detect any charge on a body It consist of two metal leaves OA and OB free to rotate about O Initially both...
- Q Two insulated metal spheres of the same size are charged with 15 esu and 25 esu The distance between their centres is 10 cm What is the force acting between...
- Q A B hollow non conducting cylinder of radius R is uniformally charged with surface charge density o A non conducting small circular ring of radius a and mass m having...
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