Physics question and answers for December 04, 2023
- Q A wire carrying a current i is placed in a magnetic field in the form of the curve y a sin is 1 TUX L X TT x0x X iBL...
- Q A triangle and a square of side a are formed by a constant lenght 1 current carrying wire Find out ratio of magnetic fields at their centres if same current...
- Q 44 Rank the value of B dl for the closed path shown in figure from the smallest to largest 2A 1 a b c d h O2A C b 3A...
- Q current flows he magnetic field at the centre O is Ho 2TR Hol 2 TR 0 tan 0 0 sin 0 R I 20 loop as shown in figure Hol...
- Q A long straight conductor carrying current is fixed on a smooth plane A circular loop is placed on the same plane as shown in figure If current through the wire...
- Q Two wires of equal length are bent in the form of two loops One of the loop is square shap whereas the other loop of circular These are suspended in...
- Q A steel wire can support a maximum load of W before reaching its elastic limit How much load can another wire made out of identical steel but with double the...
- Q 3 A disc of mass m radius r and carrying charge q is rotating with angular speed o about an axis passing through its centre and perpendicular to plane then...
- Q 17 Magnetic field at point O due to given current carrying coil is 1 2 Mol 2R Hol R 120 O 2 A 1 3 2 R 3 Mol 4...
- Q A charge Q is moving upwards vertically It enters a magnetic field directed to the north The force on the charge will be towards
- Q A long magnetic needle of length 2L magne moment M and pole strength m units is brok into two at the middle The magnetic mome and pole strength of each...
- Q 6 A metallic rod of mass per unit length 0 5 kg m is lying horizontally on a smooth inclined plane which makes an angle of 30 with the horizontal...
- Q A current I carrying wire AB is placed near another long wire CD carrying current I2 If wire ABis free to move it will have 1 D C A 11...
- Q nducting hollow sphere of mass m and radius R having total charge q is rotating with constant angular velocity o about a vertical axis as shown in the figure The...
- Q Same current i is flowing in three infinitely long wires along positive x y and z directions The magnetic field at a point 0 0 a would be I think...
- Q TARGET PRE MEDIC Two short bar magnets of magnetic moments 164 M each are arranged at the opposite corners of a square of side d such that their centres coincide...
- Q 3 Inside a long solenoid wounded with 300 turns m an iron rod is placed An iron is 0 2 m long 10mm in diameter and of permeability 10 The...
- Q a par mass m moving with velocity v along the x axis enters a region of the uniform magnetic field The minimum value of v so that the charge q...
- Q 5 Singly charged magnesium A 24 ions are accelerated to kinetic energy 2 keV and are projected perpendicularly into a magnetic field B of magnitude 0 6 T a Find...
- Q A uniform rod of length L and mass M is hinged at its upper point and is at rest at that moment in the vertical plane A current i flows...
- Q 49 Three long straight and parallel wires carrying currents are arranged as shown figure The force experienced by the conductor B of length 25 cm is 4x 4 x 104...
- Q Iwo identical bar magnets are fixed with their centres at a distance d apart A stationary charge Q is placed at P in between the gap of the two magnets...
- Q 27 A conductor of 3 m length is moving perpendicular to its length as well as a magnetic field of 10 T with a speed of 102 m s then...
- Q Positive like charge of linear charge density is passed on the outer circumference of an annular disc having outer radius 2R Negative like charge of linear charge density 2 is...
- Q 6 Two short magnets of equal dipole moments M are fastened perpendicuarly at their centres figure 36 Q1 The magnitude of the magnetic field at a distance d from the...
- Q 10 An equilateral triangle of side length 1 is formed from a piece of uniform resistance wire The current is fed as shown Then the magnitude of the magnetic field...
- Q 8 Figure shows three long straight wire parallel and equally spaced with identical currents Then the force per unit length acting on each wire due to the others b 1...
- Q If the distances between two similar magnetic poles held one cm apart be doubled then the force of interaction between them will be a doubled b halved c unchanged or...
- Q Example 5 29 The earth s magnetic field at geomagnetic poles has a magnitude 8 x 10 T Find the magnitude and the direction of the field at a point...
- Q A wire forming one cycle of sine curve is moved in x y plane with velocity V V I V J There exist a magnetic field B B k Find...
- Q A magnetic needle suspended by a silk thread is vibrating in the earth s magnetic field If the temperature of the needle is increased by 500 C then 1 The...
- Q magnetic field at point P L 10 cm L 5A L P 1 21 2 5 23 x 10 5 T 2 23 T 2 2 23 x 105 T...
- Q D A charged particle enters a magnetic field at right angles to the magnetic field The field exists for a leng equal to 1 5 times the radius of circular...
- Q 2014 In a region magnetic field along x axis changes with time according to the given graph BT B B Att B A Att co ordinates of charge are 2...
- Q Ifo is latitude and a is dip at a place then 1 1 tano tan a 2 2 tan tan a o 3 tano tan 4 tano 1 GRG 2
- Q A small current carrying loop having current io is placed in the plane of paper as shown Another semicircular loop having current io is placed concentrically in the same plane...
- Q from A in nonuniform magnetic field as shown in figure A B C The magnitude of velocities at point A B and C respectively during the motion is 1 Maximum...
- Q particle of charge per unit massa is released from origin with a velocity v vi in a uniform magnetic field Bok If the particle passes through 0 y 0 then...
- Q Two identical bar magnets are suspended first with like poles on each other and then with unlike poles on each other IfT T are the respective time periods of vibration...
- Q When current in a coil changes from 5 A to 2 A in 0 1 s an average voltage of 50 V is produced The self inductance of the coil...
- Q A straight vertical conductor carries a current At a point 5 cm due north of it the magnetic induction is found to be 20 T due east The magnetic induction...
- Q 14 A current loop in a magnetic field NEET 2013 1 Can be in equilibrium in one orientation 2 Can be in equilibrium in two orientations both the equilibrium states...
- Q A uniform magnetic field of 1 5 T exists in a cylindrical region of radius 10 0 cm it s direction being parallel to the axis along east to west...
- Q A cyclotron in which the magnetic field is 0 7 T is employed to accelerate deuterons Calculate the period of the alternating potential required Given mass of deuteron 3 34...
- Q Example 5 30 A bar magnet 30 cm long is placed in the magnetic meridian with its north pole pointing south The neutral point is observed at a distance of...
- Q c 25 cm If a circular coil of radius 20 cm having 50 turns carries a current of 2A then magnetic moment of the coil is a 0 4 2...
- Q A steady current I goes through a wire loop PQR having shape of a right angle triangle with PQ 3x PR 4x and QR 5x If the magnitude of the...
- Q 1 A infinitely long hollow conducting cylinder with inner radius R 2 and outer radius R carries a uniform current density along its length The magnitude of magnetic field B...
- Q A short bar magnet of magnetic moment 1 5 A m is placed along x axis at origin If the magnetic field along line joining origin to point P 2...
- Q Q4 A proton moves through a 0 036T magnetic field If the proton moves in a circular path with radius of 0 20m What is the speed d Ans 6...
- Q 38 A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in a A B C uniform magnetic field acting along AB If...
- Q 3 1m long wire is folded in form of a circular coil and 100 mA electric current is flowing in it then magnetic field at a point 1m away from...
- Q 0 35 SINGLE CHOICE The endpoints of a conducting string shaped as a circular loop of constant length are being pulled at a constant velocity v as shown in the...
- Q Example 6 3 A long straight wire carrying current I and a square conducting wire loop of side 1 at a distance a from current wire as shown in the...
- Q A circular coil of N turns and diameter d carries a current I It is unwound and rewound make another coil of diameter 2d current I remaining the same Calculate...
- Q An electron gun is placed inside a long solenoid of radius R on its axis The solenoid has a turns length and caries a current I The electron gun shoots...
- Q The area of cross section of three magnets of same length are A 2A and 6A respectively The ratio of their magnetic moments will be NIE 1 6 2 1...
- Q ELECTROMAGNETIC INDUCTION K Current i flows through a long wire A square loop made of conducting wire held below the wire in the same vertical plane is released and allowed...
- Q 1 A current i is flowing in a hexagonal coil of side I figure The magnetic induction at the centre of the coil will be 3 TT1 2 2 Ho...
- Q When plane of dip circle is rotated by 90 from magnetic meridian gradually then dip shown by it 1 Increases 2 Decreases 3 First increases then decreases 4 First decreases...
- Q If N pole of bar magnet is towards Earth s geographical south pole Then number of neutral points in space is 1 One 2 Two
- Q Jorce on charge or current AU shaped wire of mass m and length is immersed with its two ends in mercury see figure The wire is in a homogeneous field...
- Q 21 What are the ends of a magnet called O equators O fields ples sides
- Q 20 How is magnetic force defined O The force due to the alignment of atoms The force due to motion of electric charges O The force due to the mass...
- Q 29 A current carrying wire carries a current of 0 63 A What is the magnitude of the magnetic field at point P 0 025 meters away from the wire...
- Q 5 A current carrying wire 0 50 m long is positioned perpendicular to a uniform magnetic field of 0 60 T If the current is 0 1 A what is...
- Q 11 A wire is placed perpendicular to a uniform magnetic field of 4 6x10 T A magnetic force of 2 9x10 N is exerted on the wire If the current...
- Q 12 A 14 32 A current moves through a 15 0 cm wire If a magnetic force of 6 62 x104 N acts on the wire what is the magnetic...
- Q 13 A printer is connected to a 1 0 m cable If the magnetic force is 9 1x10 5 N and the magnetic field is 1 3x104 T how much...
- Q The measures of magnetic fields B in air at points 5 cm and 25 cm away from a l straight wire carrying a current 15 A will be 5 5...
- Q 4 An proton traveling south through a magnetic field directed West will experience a force in what direction 5 An electron traveling south through a magnetic field directed out of...
- Q As shown in the figure two long straight wires are separated by a distance of d 0 80 m The currents are I1 2 0 A to the right in...
- Q 18 A nucleus of 12 protons moves at a velocity of 4 9 x 106 m s and has a magnetic force of 7 5 x 10 18 N west...
- Q h I a 12 F2 b OF 3 F because 12 31 B 12 In the above figure if l 2 A and 12 6 A which of the following...
- Q A 40 loop circular coil has a radius of 10 0 cm It is placed in a magnetic field so that th field lines from a parmanent magnet B are...
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