Physics question and answers for February 01, 2024
- Q A dipole with electric dipole moment P is at distance r from a long thread charged uniformly with linear charge density r a The electric force on dipole due to...
- Q An incorrect statement regarding a Gaussian surface selected should be that it Can pass through any material medium whether conducting or non conducting May pass through continuous charge distribution May...
- Q In a uniform magnetic field a ring is rotating about its axis which is parallel to the magnetic field and the magnetic field is perpendicular to the plane of the...
- Q Two concentric shells have radii R and 2R charges qA and qB potentials 2V and 3V respectively Now shell B is earthed If final charges on them become q and...
- Q According to Coulomb s law if the charge on each one of a pair of charged particles is quadrupled increased by a factor of 4 the electric force between them...
- Q A point charge Q is kept at a distance 3a from the centre of a spherical conducting shell of charge 30 1 mark the CORRECT statement s and radius a...
- Q Two small spherical balls each carrying a charge Q 10 C 10 micro coulomb are suspended by two insulating threads of equal lengths 3m each from a point fixed in...
- Q The variation of electric field between two charges Q and 2 aloll line joining the charges is plotted against distance from Q as shown in figure below then correct statement...
- Q List I shows different configurations of charge distribution List II gives the corresponding total electrostatics energy of the configuration or the corresponding work done List I P Q R S...
- Q 76 In a regular polygon of n sides each corner is at a distance r from the centre Identical charges are placed at n 1 corners At the centre the...
- Q D OR An electric dipole is kept first to the left and then to the right of a negatively charged infinite plane sheet having a uniform surface charge density The...
- Q A uniform electric field is present in X Y plane Due to electrostatic field electric potentials of point A 2 m 2 m B 2 m 2 m and C...
- Q from a long thread charged uniformly with linear charge density A r a The electric force on dipole due to charged thread is 2a p 4 teor p 22 2pi...
- Q A bob of mass m 100 gm having charge q 50 C connected with a non conducting string of length Im is whirled in vertical plane with minimum speed such...
- Q The electric potential varies in space according to the relation V 3x 4y 5 volts where x and y are in meters A particle of mass 10 g starts from...
- Q 68 There are four concentric shells A B C and D of radii a 2a 3a and 4a respectively Shells Band Dare given charges q and q respectively Shell C...
- Q An electric dipole of dipole moment 10 C m is released from rest in uniform electric field 10 V m at angle 60 Maximum rotational kinetic energy of the dipole...
- Q conducting 90 A non conducting A uniformly distributed charge of linear charge density and a non conducting ring of uniformly distributed charge Q are placed as shown in the figure...
- Q A particle having charge q 2 00 uC and mass m 0 0100 kg is connected to a string having length L 1 50 m and is tied to the...
- Q Figure shows three metallic plates with charges Q 3Q and Q respectively Electric charges on faces of second plate after final distribution is 1 2 31 7Q Q 2 2...
- Q A charge Q is distributed non uniformly whose exact nature of distribution is unknown on a ring of radius R For this situation mark the correct statement s A the...
- Q Two charged small balls each of charge q and mass m when suspended from a common point by strings of length in air then these strings form an angle of...
- Q 98 The potential due to point a charge at a point A is 7V and the electric field there is 3 V m There is another point B such that...
- Q A conductor of non uniform curvature kept in uniform external electric field the charge A has the greatest concentration on the part of greatest radius of curvature B has the...
- Q A positively charged particle with mass 3 4 g and charge 12 C is initially moving with velocity 5 8 m s enters in an electric field of strength 150...
- Q 97 A conducting spherical shell is carrying a charge Q on its outer surface Its inner surface is connected to the ground by means of a wire of resistance R...
- Q Two charges separated by 60cm are moved farther apart until the fore between them has decreased by a factor of 4 How far apart are the charges then
- Q Two tram cars are kept at 4 km and 9 km radially from a distribution substation of 700 volt The first car is returning 30 A and the second car...
- Q Two point charges each of charge q are fixed at a 0 and a 0 Another positive point charge q placed at the origin is free to move along x...
- Q An a particle passes rapidly through the exact centre of a hydrogen molecule moving on a line perpendicular to the internuclear axis The distance between the nuclei is b Where...
- Q 33 A large sheet carries uniform surface charge density o A rod of length 21 has a linear charge density on one half and on the second half The rod...
- Q non conducting solid sphere of radius 30 cm and relative permittivity 1 has the volume charge density p e space from the centre of the sphere Then choose the correct...
- Q 86 In the figure A B C and D are four concentric spheres of radius a 2a 3a and 4a They contain charges 3q 6q 9q and 12q respectively In...
- Q an mistake a voltmeter is connected in series and ammeter in parallel When the circuit is switched on a Both ammeter and voltmeter will be damaged b Neither the ammeter...
- Q A particle of mass m and charge q is located midway between two fixed charged particles each having a charge q and a distance 2 apart If it is displaced...
- Q Seawater at a frequency f 9 10 Hz has permittivity 800 and resistivity p 0 25 m Imagine a parallel plate capacitor is immersed in seawater and is driven by...
- Q 4 A small electric dipole of dipole moment p is placed perpendicular to an infinitely long wire of linear charge density The centre of dipole is at a distance r...
- Q The figure shows the equipotential contours due to three point charges The labels on the contours are in Volts 3 y axis m O 15 312 1 476 5 828...
- Q 4 Given a uniform electric field E 5x10 i NC find the flux of this field through a square of 10 cm on a side whose plane is parallel to...
- Q A dipole with charges of magnitude 2nC is placed inside a cavit of a solid conductor The solid conductor has a net charge of 5nC What is the total charge...
- Q A pendulum bob of mass m carrying a charge q is at rest with its string making an angle 8 with the vertical in a uniform horizontal field E The...
- Q dq ds Surface charge density is defined as the charge per unit surface area i e o Two large thin metal plates are parallel and close to each other On...
- Q Two point charges 6 C and 16 C repel each other with a force of 120 N If a charge o 8 C is added to each of them then...
- Q The figure shows a conducting spherical shell of inner radius a and outer radius b has a total charge of Q is concentric Sally with other conducting spherical shell of...
- Q Suppose in Example 21 11 in the textbook that x 0 280 m Q 5 75 C and that the uniformly charged wire is only 6 80 m long and...
- Q Three charges are placed at the vertices of an equilateral triangle of side 10 cm Assume q 1 C 92 2 C and q3 4 C Work done in separating...
- Q 7 Consider a charged hemispherical shell shown in figure Indicate the directions not magnitude of the electric field at the central point P and an off center point P on...
- Q 2 20 Two charges 2 C and 2 C are placed at 10cm 0 0 and 20cm 0 0 respectively in the presence of a uniform external electric field of...
- Q b Two forces equal to F and 2F respectively act on a particle when the first force is increased by 100 N and second force is doubled the direction of...
- Q A point charge q is placed at a distance r from the centre of conducting sphere of radius R r R When the switch S is closed which of the...
- Q Two pith balls having charge 39 and 2q are placed at distance of a from each other For what value of charge transferred from 1st ball to 2nd ball force...
- Q Sir see the formulae where I circle h ere I can t understand how they com e and by which concept Please please please simple way mail bta dijiye sir...
- Q An infinite long wire having linear charge density o Z 0 Ao Z 0 is placed along the z axis Four points P Q R and S having co ordinates...
- Q Three charges q q and q are placed on the circumference of a circle of radius r The force on charge 0 placed at the centre of the circle as...
- Q Two charges 6 C and 4 C are placed 15 cm apart as shown At what distance from A to its right on the line joining point A and B...
- Q A particle of charge 2 C and mass 1 6 g is moving with a velocity 4 i ms At t 0 the particle enters in a region having an...
- Q Three identical electric dipoles are arranged parallel to each other at equal s as shown The separation between the charges of a dipole is negligible as compared to the separation...
- Q Charge Q 2Q and Q are given to three concentric conducting spherical shells P Q and R respectively as show in figure The ratio of magnitude of charges on the...
- Q A solid conducting sphere of radius 10 cm is enclosed by a thin metallic shell of radius 20 cm A charge q 20 C is given to the inner sphere...
- Q 48 Three charges q q and q are placed on the circumference of a circle of radius r The force on charge Q placed at the centre of the circle...
- Q The electric field in a certain region is given by 51 31 kV m The potential difference between points A and B VB VA having coordinates 4 0 3 m...
- Q Three charges q q and q are circumference of a circle of radius r The force on charge Qplaced at the centre of the circle as shown in the figure...
- Q Two thin wire rings each having a radius R are placed at a distance d apart with their axes coinciding The charges on the two rings are q and q...
- Q If on line OP electrostatic potential charges uniformly potential at O is 30V and potential at P is 15V Electric field at Q along line of motion Given OP 10m...
- Q The electric field in a region is given by Ax B where E is of in NC and x is in meters The values of constants are A 20 SI...
- Q Four electric charges q q q and q are placed at the corners of a square of side 2L as shown in figure The electric potential at point A midway...
- Q Figure shows three points A B and C in a region of uniform electric field The line AB is perpendicular and BC is parallel to the field lines Then which...
- Q A negative charge is moved by an external agent in the direction of electric field Then E Positive work is done by the electric field Potential energy of the charge...
- Q Consider a metal sphere of radius R that is cut in two along a plane whose minimum distance from the sphere s centre is h Sphere is uniformly charged by...
- Q 27 identical drops of mercury are charged simultaneously with same potential of 10 volt Assuming the drop to be spherical if all the charged drops are made to combine to...
- Q of Radii R1 and R2 by a wire the energy of the system Quiz R 41 Remains unchanged 8 Will increase 18 Will always decrease X 32 Will always decrease...
- Q Two particles carrying charges 1 C and 2 separated by a distance d apply force F on ea other If charges of particles are doubled th force of repulsion between...
- Q 11 Two identical non conducting solid spheres of same mass and charge are suspended in air from common point by two non conducting massless strings of same length At equilibrium...
- Q 10 The charges on three identical ebonite spheres are 2mC 4mC and 2 mC respectively Now first sphere is bought in contract with 2nd sphere and move apart Then second...
- Q Two short dipoles having dipole moment P and P2 are placed such that their axis are parallel to each other as shown in figure If sepration between them is r...
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