Physics question and answers for November 29, 2023
- Q 10 kHz 100 pH m 500 u H leee 2 0 mH Figure 13 1 if the frequency in the circuit in Figure 13 1 is increased to 100 kHz...
- Q A square loop of wire of side length 10 cm is placed at angle of 45 with a magnetic field that changes uniformly from 0 1 T to zero in...
- Q TA 3X6M 18 M 1 A long toroidal core has an effective diameter of 10cm is wound with 2300 Turns meter Determine the value of the mutual inductance between the...
- Q A conducting loop of resistance R and radius r has its center at the origin of the co ordinate system in a magnetic field of induction B When it is...
- Q Assertion The mutual induction between the two coils infinitely apart is zero Reason If the mutual induction between the two coils is zero it means that their se inductances are...
- Q 18 A conducting circular loop is placed in a uniform magnetic field 0 04 T with its plane perpendicular to the magnetic field The radius of the loop starts shrinking...
- Q 168 Electromagnetic Induction 6 If the current in long straight current carrying wire increases with the time then direction of induced current in circular loop is 1 Clockwise 2 Anticlockwise...
- Q In a series RC circuit a resistance and capacitance are connected in series in such a manner it takes 220V ac supply the values of resistance and capacitance are 20ohm...
- Q A circular loop of radius of 10 cm is placed perpendicular to a uniform magnetic field with an unknown strength The magnitude of the flux through the loop is 5...
- Q A non conducting ring of mass 4 kg is uniformly charged with 4C m and kept on rough horizontal surface with friction coefficient 4 A time varying magnetic field B...
- Q 5 29 A rectangular loop of wire is placed in a uniform magnetic field B acting normally to the plane of the loop If a man attempt to pull it...
- Q The circular wire loop of radius R is placed in the x z plane with the centre at the origin Another circular loop of radius r r R having 32...
- Q or decreasing current 6 An emf induced in a secondary coll is 2000 V wher current breaks in the primary The mutua Inductance is 10 H and the current reaches...
- Q Consider the following electric circuit At a given instant the current through the battery is 2 A and increasing at a rate 1 A s The value of emf of...
- Q Students of automobile engineering are working on a project as they require to analyze and compose a circuit in which a coil having inductance of 0 03H and resistance of...
- Q In gravity free space a uniform horizontal magnetic field exists into the plane of paper only in the region above xy A uniform vertical downward electric field of magnitude E...
- Q 1 Two co axial solenoids shown in figure If key of primary suddenly opened then direction of instantaneous induced current in resistance R which connected in secondary Ottic 4F0 1...
- Q Problem 1 The h parameters of a transistor are hie 1100 hfe hre 5 x 10 4 and hoe 50 25 x 10 6 A V If the transistor is...
- Q at 5 In an L F which energy is stored in the inductor is plotted against time during the growth of the current in the cirucit which of the following...
- Q A constant force F 12 N is applied on metal wire AB 1 1 m m 2 kg place on smooth horizontal surface as shown If acceleration of metal wire...
- Q 4 In an R L C series circuit R 300 2 L 0 400 H and C 6 00 10 8 F When the ac source operates at the resonance...
- Q 4 In an R L C series circuit R 300 Q L 0 400 H and C operates at the resonance frequency of the circuit the current amplitude is 0...
- Q Magnetic flux increases from 0 to 2 Tm in one turn conducting loop with one square meter area within 0 5s What is the induced emf in the loop assume...
- Q Here inductor is connected to a resistor as shown When a magnet is moved towards the coil with a constant speed till it comes out of coil completely As seen...
- Q Consider two identical circular solenoids each of length L radius p L and total number of turns N The solenoids are on the same axis and distance d L apart...
- Q 1 A uniform disc of radius r and mass m is charged uniformly with the charge q This disc is placed flat on a rough horizontal surface having coefficient of...
- Q How direction of electric field in AE is taken perpendicula r to it through which formula BET Level 11 ample 3 A time varying magnetic field B a bt exists...
- Q turn solenoid 24 cm long has a diameter of 2 4 cm A rn coil is wound tightly around the center of the solenoid Part A If the current in...
- Q 15 The drawing shows a copper wire of negligible resistance bent into a circular shape with a radius of r The radial section BC is fixed in plane while the...
- Q VP 21 2 1 Part A A conducting loop with a resistance of 10 is placed in a perpendicular to the plane of the loop magnetic that is changing at...
- Q Self inductance of a coil is 8 H The power in watt consumed by coil purely inductive is given by P 8 i where i is current in ampere Find...
- Q A square loop of wire of side length 10 cm is 50 placed at angle of 45 with a magnetic field that changes uniformly from 0 1 T to zero...
- Q The straight wire carrying current i is in the plane of the circular loop If current i is decreasing with time then O There is no induced current in the...
- Q Choose the incorrect option regarding amplifier among the following O The phase difference between input signal and output signal in CE amplifier is O Power gain current gain x O...
- Q A coil of resistance 100 Q is placed in a magnetic field If the magnetic flux in Wb linked with the coil varies with time t in s as 40t...
- Q B D A wire of length Lo and mass m is suspended by a pair of springs in a magnetic field of induction The magnitude and direction of the current...
- Q 3 A proton moving with velocity v is acted upon by electric field E and magnetic field B The proton will move undeflected with constant speed if 1 E is...
- Q View In English A conducting wire frame is placed in a magnetic field which is directed into the paper The magnetic field is increasing at a constant rate The directions...
- Q For the circuit in the figure assume that 12 0 V R 7 200 and L 6 20 H The ideal battery is connected at time t 0 a How...
- Q A current loop PQRS is held fixed on the plane of the paper as shown in the figure The QR radius 2a and SP radius a of the loop are...
- Q A time varying magnetic field is directed into the page as shown in figure and it is decreasing at constant rate of 150 T s The reading of ammeter is...
- Q Suppose N 1000 and N 50 and primary is connected to 1 main supply of 100 V and secondary to a night bulb of 0 5 2 and n 80...
- Q 7 The power factor of the given circuit is 1 A Only one correct answer 1 R www A 2 V L wwwxxx 6 V C Review 6 V i
- Q A metallic wheel of radius 1 m has 10 spokes It is rotating with a speed of 2 revolutions per second in a plane normal to a magnetic field of...
- Q 5 74 A small coil of radius r is placed at the centre of another coaxial coil of radius R R r Find the coefficient of mutual induction for this...
- Q A wire with total resistance R is formed into a circle This circle is placed horizontally in the xy plane within the constant magnetic field in the z direction The...
- Q 9 A parallel L R circuit consists of two ideal inductances L and 2L and a resistor R At an instant the same current I is flowing in both the...
- Q A metal disc of radius 25 cm rotates with a constant angular velocity of 240 rad s about its axis in uniform magnetic field of 2 T directed perpendicular to...
- Q A transformer with efficiency 90 works at 4 5 kW and 100 V If the secondary voltage is 200 V then the primary and secondary currents are respectively 45 A...
- Q Tarik winds a small paper tube uniformly with 167 turns of thin wire to form a solenoid The tube s diameter is 9 09 mm and its length is 2...
- Q 31 An ideal battery of emf E an inductor of inductance L and resistor of resistance R are connected in series Maximum energy stored in the magnetic field is 1...
- Q Q 4 The current I changes with time t in an inductor as shown in the given figure The potential difference e across the inductor is dled f 1 3...
- Q In a cylindrical magnetic field B is changing as B Bo at Find the value of fede for the path of BOA as shown in the figure Line AOB is...
- Q doesn t capacitor block DC current inductor blocks AC and allows DC rig ht Q20 The figure shows a circuit that contains three identical resistors with resistance R 9 0...
- Q or is O 1 Clockwise and increasing with time 2 Clockwise and decreasing with time 3 Anti clockwise and increasing with time 4 Anti clockwise and decreasing with time 28...
- Q In the following circuit the magnetic energy stored in inductor in steady state is 2N V RR R R 3 2 R R ww R ww 0000 L 2 1...
- Q dt There is a horizontal cylindrical uniform but time varying magnetic field increasing at a constant rate d as shown A charged particle having charge q and mass m is...
- Q Calculate the collector voltage V of the transistor circuit is shown in the figure Given a 0 96 Icao 20 4 VBE 0 3V RB 100 ks2 Vcc 10V and...
- Q A conducting loop of radius R has self inductance L A uniform and constant magnetic field B is applied perpendicular to the plane of the loop Initially current in this...
- Q 72 What should be the values of the components Rand R such that the frequency of the Wien Bridge oscillator is 300 Hz Given C 0 01 F and R...
- Q Kindly give detailed solution of all especially of c in the tigures all the surfaces are frictionless wires and sliders are resistanceless System is in vertical plane A uniform magnetic...
- Q The current in a coil of self inductance 2 0 Henry is increasing according to 1 4 sin t ampere Find the amount of energy spend in Jolie during the...
- Q 39 connected by a conducting wire at one end A uniform magnetic field B directed vertically downwards exists in the region of space A light uniform ring of diameter d...
- Q Two coils X and Y are kept inclose vicinity of each other When a varying current 1 t flows through coil X the induced emf V t in coil Y...
- Q A rectangular coil of 100 turns with area 0 1 m is rotated at 10 revolution per second and placed in a uniform magnetic field of 0 01 T perpendicular...
- Q x A transformer has 200 turns in primary coil and 600 turns in secondary coil If a 220V DC is applied across primary coil what will be the voltage across...
- Q The plot given below is of the average power delivered to an LRC circuit versus frequency The quality factor of the circuit is A 5 0 B 2 0 D...
- Q pF 400 pF 20 The figure shows a series LCR circuit connected to a variable frequency and 220 V source The source frequency which drives the circuit in resonance will...
- Q 5 6 The primary winding of a transform 200 turns whereas its secondary has 2000 turns If the primary is co to an ac source of 20 V and 60...
- Q iii Two infinite long straight parallel wires A and B are separated by 0 1m distance and carry equal currents in opposite directions A square loop of wire C of...
- Q 4 Two circular coils one of small radius r and other of larger radius R r R are placed co axially with centres coinciding The mutual inductance of the arrangement...
- Q A 20 cm long conductor carrying a current of 10 A is kept perpendicular to magnetic field of 0 6T The mechanical power required to move conductor with a speed...
- Q A square loop of edge 20 cm and resistance of 1 92 is placed vertically in horizontal plane A uniform magnetic field of 0 5T is set up across the...
- Q A circular loop with its plane parallel to plane of paper is entering into uniform magnetic field directed into the plane of paper perpendicularly The loop is moved at constant...
- Q A square loop of side length L meter lies in x y plane in a region where the magnetic field is given by B B i 2 3k T B...
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