Description : The equivalent inductances of two coils 2H and 5H in series aiding flux with mutual inductance of 3H is a) 10 b) 30 c) 1 d) 13
Last Answer : d) 13
Description : Calculate the mutual inductance of two tightly coupled coils with inductances 49H and 9H. a) 21 b) 58 c) 40 d) 49/9
Last Answer : a) 21
Description : The flux lines of two energised coils overlapping on each other will give a) Series aiding b) Shunt aiding c) Series opposing d) Shunt opposing
Last Answer : a) Series aiding
Description : Which type of flux will increase the inductance? a) Series aiding b) Series opposing c) Shunt aiding d) Shunt opposing
Description : A network consists of several inductances connected in parallel. The equivalent inductance of the network is given by (A) the sum of the individual inductances. (B) the reciprocal of the ... of individual inductances. (D) the reciprocal of the sum of reciprocals of individual inductances.
Last Answer : A network consists of several inductances connected in parallel. The equivalent inductance of the network is given by the reciprocal of the sum of reciprocals of individual inductances.
Description : An a.c series circuit has resistance of 10ohm, inductance of 0.1H and capacitance of 10µf, voltage applied to circuit is 200V. find (i) Resonant frequency (ii) Current at resonance (iii) Power at resonance
Last Answer : Solution: For RLC series circuit
Description : The inductance is proportional to the ratio of flux to current. State True/False. a) True b) False
Last Answer : a) True
Description : The expression for the inductance in terms of turns, flux and current is given by a) L = N dφ/di b) L = -N dφ/di c) L = Niφ d) L = Nφ/i
Last Answer : a) L = N dφ/di
Description : Two coils have a mutual inductance 0.005H. The current changes in the first coil according to the equation `I=I_(0) sin omegat "where" I_(0)=10A and o
Last Answer : Two coils have a mutual inductance 0.005H. The current changes in the first coil according to the equation `I ... (pi//x)` volts. Find the value of x.
Description : Find the flux contained by the material when the flux density is 11.7 Tesla and the area is 2 units. a) 23.4 b) 12.3 c) 32.4 d) 21.3
Last Answer : a) 23.4
Description : Find the flux density of a conductor in the square of the centre of the loop having current 3.14A and radius is 1.414m in air. a) 8π x 10 -7 b) 4π x 10 -7 c) 6π x 10 -7 d) 2π x 10 -7
Last Answer : c) 6π x 10 -7
Description : Three charged cylindrical sheets are present in three spaces with σ = 5 at R = 2m, σ = - 2 at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 3m. a) 3 b) 10/3 c) 11/3 d) 4
Last Answer : b) 10/3
Description : Find the time constant in a series R-L circuit when the resistance is 4 ohm and the inductance is 2 H. a) 0.25 b) 0.2 c) 2 d) 0.5
Last Answer : d) 0.5
Description : Consider the conductor to be a coil of turns 60 and the flux density to be 13.5 units, current 0.12A and area 16units. The torque will be a) 1555.2 b) 1222.5 c) 525.1 d) 255.6
Last Answer : a) 1555.2
Description : Three charged cylindrical sheets are present in three spaces with σ = 5 at R = 2m, σ = - 2 at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 6m. a) 17/6 b) -17/6 c) 13/6 d) -13/6
Last Answer : d) -13/6
Description : The magnetic energy of a magnetic material is given by a) BH/2 b) B/2H c) H/2B d) B/H
Last Answer : a) BH/2
Description : The energy stored in an inductor 2H and current 4A is a) 4 b) 8 c) 12 d) 16
Last Answer : d) 16
Description : Find the maximum force of the conductor having length 60cm, current 2.75A and flux density of 9 units. a) 14.85 b) 18.54 c) 84.25 d) 7.256
Last Answer : a) 14.85
Description : Find the magnetic force when a charge 3.5C with flux density of 4 units is having a velocity of 2m/s. a) 14 b) 28 c) 7 d) 32
Last Answer : b) 28
Description : When currents are moving in the same direction in two conductors, then the force will be a) Attractive b) Repulsive c) Retracting\ d) Opposing
Last Answer : a) Attractive
Description : Find the inductance of a material with 100 turns, area 12 units and current of 2A in air. a) 0.75mH b) 7.5mH c) 75mH d) 753mH
Last Answer : a) 0.75mH
Description : Find the flux density due to a conductor of length 6m and carrying a current of 3A(in 10 -7 order) a) 1 b) 10 c) 100 d) 0.1
Last Answer : a) 1
Description : Find the flux density B when the potential is given by x i + y j + z k in air. a) 12π x 10 -7 b) -12π x 10 -7 c) 6π x 10 -7 d) -6π x 10 -7
Last Answer : b) -12π x 10 -7
Description : Find the magnetic flux density of a finite length conductor of radius 12cm and current 3A in air( in 10 -6 order) a) 4 b) 5 c) 6 d) 7
Last Answer : b) 5
Description : Find the energy of a coil of inductance 18mH and current passing through it 1.25A.(in 10 -3 order) a) 14.06 b) 61 c) 46.1 d) 28.12
Last Answer : a) 14.06
Description : Calculate the emf of a material having flux density 5sin t in an area of 0.5 units. a) 2.5 sin t b) -2.5 cos t c) -5 sin t d) 5 cos t
Last Answer : d) 5 cos t
Description : Calculate the emf of a material having a flux linkage of 2t 2 at time t = 1second. a) 2 b) 4 c) 8 d) 16
Last Answer : b) 4
Description : Find the electric field applied on a system with electrons having a velocity 5m/s subjected to a magnetic flux of 3.6 units. a) 15 b) 18 c) 1.38 d) 0.72
Last Answer : b) 18
Description : The force on a conductor of length 12cm having current 8A and flux density 3.75 units at an angle of 300 is a) 1.6 b) 2 c) 1.4 d) 1.8
Last Answer : d) 1.8
Description : In the circuit shown the cell is ideal. The codil has an inductance of 2H and will blow when the current through it reaches 5a. The switch is closed a
Last Answer : In the circuit shown the cell is ideal. The codil has an inductance of 2H and will blow when the ... Find the time (in second)n when fuse will blow.
Description : When the series field relay "FR" of the winch circuit shown in the illustration is energized during dynamic braking the _______________. EL-0102 A. shunt Field Relay "FR-B.O." is de-energized and contacts ... . shunt Field Relay "FR-B.O." opposes the series coil's flux and sets the mechanical brake
Last Answer : Answer: B
Description : Calculate the emf in a material with flux linkage of 3.5t 2 at 2 seconds. a) 3.5 b) -7 c) -14 d) 28
Last Answer : c) -14
Description : Find the torque of a loop with magnetic moment 12.5 and magnetic flux density 7.65 units is a) 95.625 b) 65.925 c) 56.525 d) 65.235
Last Answer : a) 95.625
Description : Find the total flux in a material of flux density 15 units in an area of 24 units. a) 3.6 b) 7.2 c) 9.6 d) 5.4
Last Answer : a) 3.6
Description : Find the total flux in a coil of magnetic flux density 12 units and area 7 units. a) 0.84 b) 0.96 c) 8.4 d) 9.6
Last Answer : a) 0.84
Description : Capacitance is the property of an electric circuit opposing a change in the _____________. A. current in the circuit B. voltage in the circuit C. inductance in the circuit D. resistance in the circuit
Description : The resistance in a magnetic material is called as a) Capacitance b) Inductance c) Reluctance d) Magnetic resistance
Last Answer : c) Reluctance
Description : The inductance of a coaxial cable with inner radius a and outer radius b, from a distance d, is given by a) L = μd ln(b/a)/2π b) L = 2π μd ln(b/a) c) L = πd/ln(b/a) d) L = 0
Last Answer : a) L = μd ln(b/a)/2π
Description : Inductance is present in semiconductor. State True/False. a) True b) False
Last Answer : b) False
Description : The inductance is the measure of a) Electric charges stored by the material b) Emf generated by energising the coil c) Magnetic field stored by the material d) Magnetization of dipoles
Last Answer : c) Magnetic field stored by the material
Description : The magnetostatics highly relies on which property? a) Resistance b) Capacitance c) Inductance d) Moment
Last Answer : c) Inductance
Description : Find the turns in an solenoid of inductance 23.4mH , current 2A and area 15cm. a) 900 b) 400 c) 498 d) 658
Last Answer : c) 498
Description : Find the inductance when the energy is given by 2 units with a current of 16A. a) 15.6mH b) 16.5mH c) 16.8mH d) 15.8mH
Last Answer : a) 15.6mH
Description : Find the inductance of a coil with permeability 3.5, turns 100 and length 2m. Assume the area to be thrice the length. a) 131.94mH b) 94.131mH c) 131.94H d) 94.131H
Last Answer : a) 131.94mH
Description : The electric field intensity of a field with velocity 10m/s and flux density of 2.8 units is a) 0.28 b) 28 c) 280 d) 10/2.8
Description : Calculate the reluctance of the material with a mmf of 3.5 units and flux of 7units. a) 32.5 b) 10.5 c) 0.5 d) 2
Last Answer : b) 10.5
Description : Calculate the flux density due to a circular conductor of radius 100nm and current 5A in air. a) 10 b) 100 c) 0.1 d) 1
Last Answer : a) 10
Description : Calculate the Larmer angular frequency for a magnetic flux density of 12.34 x 10 -10 . a) 108.36 b) 810.63 c) 368.81 d) 183.36
Last Answer : a) 108.36
Description : Find the magnetic field intensity of a material with flux density of 24 units in air(in 10 6 order) a) 19.09 b) 21 c) 25 d) 26.78
Last Answer : a) 19.09
Description : Given the magnetic field is 2.4 units. Find the flux density in air(in 10 -6 order). a) 2 b) 3 c) 4 d) 5
Last Answer : b) 3