Physics question and answers for December 11, 2023
- Q 4 46 The magnetic moment of a short magnet is 8 Am What is the magnetic induction at a point 20 cm away on its equatorial line from its mid...
- Q Consider a metallic ring of radius 1m mass 1kg and carrying current 1A in a gravity free space in x y plane with its center at origin as shown If...
- Q 5 Two particles A and B of masses m and me respectively and having the same charge are moving in a plane A uniform magnetic field exists perpendicular to this...
- Q The ratio of magnetic field at the centre of the uniform coil of single turn due to arc abc and arc adc will be 1 I a B 4 B2...
- Q 5 If magnetic field at a point P x y z is given by B a x y k then the net force on loop shown in the figure is...
- Q 14 Two infinitely long straight wires lie in the xy plane along the lines x R The wire located at x R carries a constant current and the wire located...
- Q TYPE questions Each question has 4 A conical container height h Radius of base R a spherical container Radius 3R and a cylindrical container height h Radius of base 2R...
- Q 0 The magnetic needle of tangent galvanometer is deflected at an angle 30 due to a magnet The horizontal component of earth s magnetic field is 0 34 x 10...
- Q 20 If declination at a place is known to be 15 E And a compass needle points as shown the geographic north is represented by the direction numbered 1 1...
- Q jual dipole moments M are fastened perpendicularly at their centres as shown below point P is in the plane of the magnets N 1 Ho M 4 d 1 S...
- Q Given fig shows cross section of two long straight wires The left hand wire carries current directly out of the page The net magnetic field due to the two currents...
- Q The radius of a circular coil is R and it carries a current of I ampere intensity of magnetic field at a distance x on the axis from the centre...
- Q sliding on horizontal surface A uniform magnetic field B perpendicular to plane of the ring exist in the region Choose the correct option B A 000 B IVc Vgl IVc...
- Q Two polaroids are placed in the path of unpolarized beam of intensity lo such that no light is emitted from the second Polaroid If a third Polaroid whose polarization axis...
- Q The coils A and B having radii in the ratio 1 2 carrying currents in the ratio 5 1 and have number of turns in the ratio 1 10 The...
- Q Figure shows an electrical circuit which has a rectangula region of uniform and constant magnetic field B A long metallic sheet of width is being moved with velocity v Reading...
- Q An electron moving in the XY plane with 106 m s makes an angle of 60 with X axis There is a magnetic field of 10 2 Wblm directed along...
- Q When is the field constant and zero nside the tube Q4 A hollow tube is carrying an electric current along its length distributed uniformly over its surface The magnetic field...
- Q A long straight wire of radius R carries a steady current 1 The current is uniformly distributed over its cross section The magnetic field at a distance from its 2a...
- Q Two wires are wrapped over a wooden cylinder to form two coaxial loops carrying currents i and i If i 8i the value of x for B 0 at the...
- Q If an electron of charge e is moving along X direction and magnetic field 1 point is along Z direction then the magnetic force acting on the electron will be...
- Q An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E The direction of electric field is now reversed keeping its...
- Q A long straight wire of radius R carries a steady current The current is uniformly distributed over its cross section The magnetic field at a distance from its centre is...
- Q The voltage of an source varies with time according to the equation V 100 sin 100 it cos 100 nt Where tis in second and Vis in volt then The...
- Q The initial phase angle for current 10 sin wt 8 co wt is tan tan sin 90 4 5 5 3 45
- Q Infinite long strip of width 3 cm carrying current 10 A is placed in x y plane Magnetic field at a distance of 1 cm from strip at an outside...
- Q In the circuit given below what will be the reading of voltmeter V wwww 300 V 900 V 200 V 100 V oooo 100 V 100 200 V 150 Hz
- Q The strength of current in 1 H inductor changes at a rate of 2A sec Find the voltage across it and determine the magnetic energy stored in the inductor after...
- Q 180 Mark for Review To obtain radial magnetic field in a moving coil galvanometer O The number of turns in the coil are increased O Poles are cut cylindrically 02...
- Q Example 1 8 A uniform constant magnetic field B directed tan angle of 45 to the x axis in the x y plane PQRS is a rigid quare wire frame...
- Q An electron enters a region where magnetic field B and electric field E are mutually perpendicular then O It will always move in the direction of B O It will...
- Q A long thin non conducting cylindrical pipe having surface charge density o radius R rotating with angular velocity kt about is axis where k is a positive constant Which of...
- Q 33 A circular loop of radius R is moved with a velocity v as shown in the diagram The force needed to maintain its velocity constant is 2 20 2m...
- Q Two long conductors separated by a distance d carry currents I and I in the same direction They exert a force F on each other Now the current in one...
- Q An insulating thin rod of length 7 has linear charge density p x Po on it The rod is rotated about an axis passing through the origin x 0 and...
- Q wire of infinite length carrying current has along the z axis A square loop of side is placed such hat the plane of the loop makes an angle 74 with...
- Q A long straight wire carries a current along the x axis Consider the point A 0 1 0 B 0 1 1 C 1 0 1 and D 1 1...
- Q 28 The interference pattern is obtained with two coherent light sources of intensity ratio 4 In the min will be max interference pattern ratio max 1 4 3 3 8...
- Q de A 3 The magnitude of uniform magnetic field in a small region of Helmholtz coils is nearly N is number of turns in each coil 2 1 HONI 2R...
- Q A circular coil of 30 turns and radius 8 cm carries a current of 6 A It is suspended in a uniform horizontal magnetic field of 1 0 T The...
- Q certain region uniform electric field E and magnetic field B are present in the opposite direction At the instant t 0 a particle of mass m carrying a charge q...
- Q i ii State Biot Savart law A current I flows in a conductor placed perpendicular to the plane of the paper Indicate the direction of the magnetic field due to...
- Q e 16 Write equation for Ampere s circuital law for the Amperian loop shown traversed in the direction shown by arrow marks put on it 1 2 If seen from...
- Q A solenoid core material has relative permeability 400 Windings of solenoid are insulated from core and carry a current of 2 A If number of turns are 1000 per metre...
- Q Two sliding rods each of length is moving with velocity v and 2v as shown in the given figure in presence of external magnetic field B The current in the...
- Q There is a magnetic field acting in a plane perpendicular to the sheet of paper downward into the paper shown in figure a particle in vacuum moves in the plane...
- Q A proton an electron a neutron an a particle and an unknown particle enter in a region of uniform magnetic field with equal momenta Figure shows paths marked 1 to...
- Q The dipole moment of a circular loop carrying a current is m and the magnetic field at the centre of the loop is B When the dipole moment is doubled...
- Q A metal rod slides on conducting rails as shown in figure The circuit area is perpendicular to magnetic field with B 0 2 T If the resistance of circuit is...
- Q A cyclotron s oscillating frequency is 10 MHz The radius of dee is 60 cm What is the kinetic energy of proton produced by the accelerator if the magnetic field...
- Q A charged particle of speci charge 0 2 C kg has velocity of 21 3 m s at some instant in uniform magnetic field 51 21 T What is the...
- Q A moving coil galvanometer coil has a coil of area A number of turns N The radial magnetic field present is B the moment of inertia of the coil is...
- Q L is a circular ring made of a uniform wire currents enters and leaves the ring through straight conductors which if produces would have passed through the centre C of...
- Q A proton a deuteron and an alpha particle w same kinetic energy enter in a region of unifo magnetic field moving at right angles to magne field What is the...
- Q 8 A square frame of side 1 carries a current I and produces a magnetic field B at its centre If the same current is passed through a circular coil...
- Q A long straight wire carries the current along ve x direction Consider four points in space A 0 1 0 B 0 1 1 C 1 0 1 and D...
- Q A rigid wire consists of a semicircular portion of radius R and two straight sections AB and CD The wire has partially emerged in a perpendicular magnetic field Bo as...
- Q What is magnetic field at point O if the wire carries a current and straight parts are very long z axis 021 24 Hol 2R O Hol 4R C T...
- Q 4 The force between two parallel wire is 2 x 10 7 Nm which are placed 1 m apart to each other in vacuum The electric current flowing through the...
- Q Two ferromagnetic materials X and Y have Hysteresis curves of the shapes shown below H H X and Yare suitable for making permanent magnets X is more suitable for permanent...
- Q Online Mock Test Series for NEET 2020 10 Current is flowing in a long wire which is turned by 90 at O Distance of a point P from Ois d...
- Q questions Each question has 4 choices 1 2 3 Read More The magnetic dipole moment of current loop as shown in figure is Y Semicircle Z axis L 90 X
- Q When a proton has a velocity v 2 3 106 m s it experiences a force X 3 X F 1 28 10 k N When its velocity is along...
- Q The force on a current carrying square loop PQRS due to infinitely long current carrying wire in its plane as shown in the figure is lo 2a O Hollo 2...
- Q questions Each question has 4 choices 1 2 Read More Current is moving in a regular hexagon shaped loop of side length a What is the magnetic field at the...
- Q The radius of a circular current carrying coil is R At what distance from the centre of the coil on its axis the intensity of magnetic field will be 1...
- Q A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F on a particle placed at a distance 3R from the center of...
- Q 18 A dip circle is placed in geographic meridian at a place where dip and declination are known to be respect 30 and 45 What dip will be given by...
- Q becomes ww do Change N Total ne of Twins in p Very Short Answer Type Questions 16 As soon as current is switched on in a high voltage wire the...
- Q The conductor AD moves to the right in a uniform magnetic field directed into the paper X XD X X X X X X X X X X X X...
- Q A small square loop of wire of side is placed inside a large square loop of wire of side L L The loop are coplanar and their centre coincide The...
- Q 136 A voltmeter gives full scale deflection at 20 V To convert it into a voltmeter which gives a full scale deflection at 200 V the voltmeter should be connected...
- Q ring is dropped down keeping its plane perpendicular to a constant and horizontal magnetic field The ring enters the field region at t 0 and completely emerges out at t...
- Q A long wire carrying a steady current is bent into a circular loop of one turn The magnetic field at the center of the loop is B It is then...
- Q 1 A thin bar magnet is cut into two equal parts as shown in the figure The ratio of moment of inertia to the magnetic moment of each part will...
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