Physics question and answers for November 23, 2023
- Q 5 16 A rectangular loop with a sliding connector of length 10cm is situated in a uniform magnetic field perpendicular to plane of loop The magnetic induction is 0 1T...
- Q A physicist works in a laboratory where the magnetic field is 2T She wears a necklace enclosing an area of 0 01m in such a way that the plane of...
- Q The primary and secondery coils of a transformer have 50 and 1500 turns respectively If the magnetic flux linked with the primary coil is given by 0 4t where is...
- Q Illustration 16 Two conducting circular loops of radii R and R are placed in the same plane with their centres coinciding Find the mutual inductance between them assuming R R
- Q Illustration 8 A straight rod of length I is moving with speed v in the vicinity of an infinite straight concuctor carrying current I as shown Find the induced emf...
- Q relation of diode is given by I e 1000V T 1 mA where the applied voltage V is in volts and the temperature T is in degree Kelvin If a...
- Q A non planar circular loop consists of two semi circles one of which lies in yz plane the other is in xz plane as shown The magnetic force experienced by...
- Q 5 A wire of fixed length is wound on a solenoid of length l and radius r Its self inductance is found to be L Now if same wire is...
- Q A flexible wire loop in the shape of a circle has a radius that grows linearly with time There is a magnetic field perpendicular to the plane of the loop...
- Q The voltage of an AC source varies with time according to the equation V 100 sin 100 t cos 100 t Where t is in second and V is in...
- Q In the circuit shown in figure R 1 CR S is closed at time t 0 The current through C L would be equal after a time t equal to...
- Q Q7 An air cored solenoid with length 30 cm area of cross section 25 cm and number of turns 500 carries a current of 2 5 A The current is...
- Q A rectangular coil is moving towards a linear current carrying conductor parallel to its longer side as shown The i direction of current induced in the coil will be A...
- Q A charged particle q m enters perpendicular in a uniform magnetic field B and comes out of field as shown in the figure The angle of deviation 0 and time...
- Q A circular conducting loop of mass m is placed in a magnetic field B perpendicular to its plane and connected to a battery as shown in the fig The circuit...
- Q 13 Switch is in position A for long time At time t 0 it is shifted to position B Find the maximum charge that will accumulate on capacitor 1 JLC...
- Q Ws an isosceles triangle wire frame with apex angle equal to 1 2 The frame starts entering into the region of uniform magnetic field B with constant velocity v at...
- Q c 1 389 H d 13 89 H a 0 79 W c 2 74 W NEET 2018 An inductor 20 mH a capacitor 100 F and a resistor 50...
- Q Figure shows a straight wire placed between the pole pieces of a magnet Induced emf will be developed across the ends of the wire when it is moved towards 1...
- Q A vertical ring of radius r and resistance R slips vertically between two frictionless and resistanceless vertical rails The rails which are joined at top There is a uniform magnetic...
- Q 28 A solenoid has 2000 turns wound over a length of 0 3 m The area of its cross section is 1 2 x 10 m Around its central section...
- Q Q4 In the circuit shown the switch S has been closed for a long time and them o ens at t 0 12 VT 3 02 wwwwwww 92 S 6Q...
- Q 228 The following figure shows a conducting rod on two parallel conducting rails The only resistance present in R shown in figure If an unsteady magnetic field B Bot is...
- Q carrying current I t kte k 0 as a function of time t20 Counter clockwise current is taken to be positive A circular conducting coil of radius 2R is placed...
- Q Figure shows a conducting ring A conducting rod of length is hinged at the centre of the ring and its other end touches the ring such that the rod can...
- Q Figure shows a circular wheel of radius 10 0 cm whose upper half shown dark in the figure is made of iron and the lower half of wood The two...
- Q 69 A semicircular wire is moving with uniform velocity in a uniform magnetic field as shown in figure Hence the wire becomes B X A 1 Electrically charged 2 Positively...
- Q A highly conducting ring of radius R is perpendicular to and concentric with the axis of a long solenoid as shown The ring has a narrow gap of width 8...
- Q Shown in figure there is a simple network of these resistors R 1 R 20 and Rs 30 A battery of emf 0 3 volt is connected The dimension of...
- Q 2 The figure shows a rectangular loop with area A 0 2 m and resistance R 222 rotating about the axis given by the dashed line It rotates at a...
- Q space 0 In all other cases Two parallel conducting rails are connected to a source of emf E and internal resistance r Another conducting rod of length l having negligible...
- Q Two inductors of indu 4H are coupled in series The separation between them and relative orientation is fixed and once they are connected in configuration A and then in configuration...
- Q A thin circular ring of area A is held perpendicular to a uniform magnetic field B A small cut is made in th ring and a galvanometer is connected across...
- Q The magnetic flux in weber in a closed circuit of resistance 100 varies with time in seconds according to equation 6t 5t 1 A the magnitude of induced current at...
- Q A straight conducting rod of length 30cm and having a resistance of 0 2 ohm is allowed to slide over two parallel thick metallic rails with uniform velocity of 0...
- Q 6 One conducting U tube can slide inside another as shown in figure maintaining electrical contacts between the tubes The magnetic field B is perpendicular to the plane of the...
- Q The magnetic flux linked with a coil is and the emf induced in it is E then select correct option 1 If 0 E must be zero 2 If 0...
- Q Example 21 A uniform wire of resistance per unit length is bent into a semicircle of radius a The wire rotates with angular velocity w in a vertical plane about...
- Q The variation of magnetic flux with time is shown The variation of induced emf with time is shown as Flux 3 Emf4 M Emf Time Time Time 2 4 Emf...
- Q 10 The switches in figure 38 Q8a and 38 8b are closed at t 0 and reopened after a long time at t to L R C RC E a...
- Q 6 A circular loop of wire radius R rotates about z axis with angular velocity co The normal to the loop is perpendicular to z axis At t 0 normal...
- Q Two thin semicircular ring of radius R 2 are smoothly joined and is falling with its plane vertical in a horizontal magnetic induction B At the position MNQ the speed...
- Q For the coil in the diagram below when the switch is pressed a what is the polarity of end A b which way will the compass point then A B...
- Q 22 The inductance of a closed packed coil of 400 turns is 8 mH A current of 5 mA is passed through it The magnetic flux per turn is H...
- Q A thin circular ring of radius R is falling with its plane vertical in a horizontal magnetic induction B At the position MNQ the speed of ring is vo What...
- Q 11 A wooden stick of length 3 is rotated about an end with constant angular velocity to in a uniform magnetic field B perpendicular to the plane of motion If...
- Q 2 A thin uniform conducting rod MN of length m starts sliding from 3 rest from initial vertical position between two smooth perpendicular non conducting surfaces as shown A uniform...
- Q Two circular similar coaxial loops carry equal currents in the same sence If the loops are brought nearer what will happen 1 Current will increase in each loop 2 Current...
- Q Consider a region of cylindrical magnetic held changing with time at the rate x A triangular conducting loop PQR is placed in the field such that mid point of side...
- Q A uniformly wound solenoidal coil of self inductance 1 8 x 104 Henry and resistance 62 is cut into two identical coils They are now connected in parallel across a...
- Q value of electric field in a region where electromagnetic wave is propogating is E then instantaneous value of energy density in the space is E is peak value of electric...
- Q A conducting bar of length D rotates with angular frequency w about a pivot P at one end of the bar see the figure The other end of the bar...
- Q 3 3 A conducting circular loop of face area 2 5 x 10 m is placed perpendicular to a magnetic field which varies as B 0 20 T sin 50r...
- Q 3 A coil having n turns and resistance Ris connected in series to a galvanometer of resistance 4R Q This combination is moved in time t second from a magnetic...
- Q d is initially attracted and If the instantaneous magnetic flux and induced emf produced in a coil is o and E respectively then according to Faraday s law of electromagnetic...
- Q A 25 cm long solenoid has radius 2 cm and 500 total number of turns It carries a current of 15 A If it is equivalent to a magnet of...
- Q Four identical conducting rods are connected by pins The velocity of point R is v A uniform magnetic field B acts out of the paper Choose the correct statement s...
- Q 50 The Network shown in Figure is a part of the circuit The battery has negligible resistance A R 222 E 12V L 5mH oo I B At a certain...
- Q At the geomagnetic pole a compass needle 1 Stay in North South direction 2 Stay in East West direction 3 Move in vertical plane 4 Stay in any position
- Q In figure there are two sliders and they can slide on two frictionless parallel wires in uniform magnetic field B which is present everywhere The mass of each slider is...
- Q 9 A conducting rod PQ is rotated in a magnetic field B about an axis passing through point O as shown in figure Then potential difference between P and Q...
- Q A long solenoid has self inductance L If its length is doubled keeping total number of turns constant then its new self inductance will be L 1 2 2 2L...
- Q 3 The number of turns in the coil of an ac generator is 5000 and the area of the coil is 0 25 m The coil is rotated at the...
- Q conducting loop is placed in a magnetic uniform as shown in figure For this situation mark the correct statement 3 B A The force of compression experienced by loop is...
- Q 5 A bar magnet is released from rest along the axis of a very long vertical copper tube After some time the magnet a will stop in the tube b...
- Q uced current for the with respect to time ob O ii I v observer Clas O 821 CHID vi W O O
- Q 1 The coefficient of self induction of two inductor coils are 20 mH and 40 mH respectively If the coils are connected in series so as to support each other...
- Q loop 6 Figure 38 E5 shows a square loop of side 5 cm being moved towards right at a constant speed of 1 cm s The front edge enters the...
- Q Free Response Solve each problem showing all work Partial credit may be given kq 92 Nm FE c centi 10 m milli 10 3 micro 10 6 n nano 10...
- Q Figure shows three conducting rails connected with resistances R R and 2R here R 59 A wire in form of sin curve x 2 sin y is being moved with...
- Q The magnetic flux through a coil varies with time t as shown in the diagram Which graph best represents the variation of the e m f E induced in the...
- Q A toroid having 500 turns cross section 20cm and mean radius 40 cm is filled with medium H 350 Its self inductance is iw 1 87 5 mHboole Joulai 3...
- Q In the adjacent figure the mutual inductance of the infinite straight wire and the coil is M while the self inductance of the coil is L The current in infinite...
- Q 2 In the adjacent figure the mutual inductance of the infinite straight wire and the coil is M while the self inductance of the coil is L The current in...
- Q 5 The magnetic flux through a stationary loop with resistance R varies during interval of time T as at Tt The heat generated during this time neglecting the inductance of...
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