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q a capacitor of capacitance 2 muf is in an ac circuit of frequency 1000 hz if the rms value of the applied emf is 10 v find the effective current
what are some diseases characterized by progressive loss of the axonal myelin sheathmultiple sclerosis is a severe disease caused by progressive
q why can a dc ammeter not read aca dc ammeter cant measure ac because ac is changing continuously and periodically as well as a dc ammeter can just
what are the cells that produce the myelin sheath of which substance is the myelin sheath formedin the central nervous system cns the myelin sheath
q a coil of area of cross section 05 m2 among 10 turns is in a plane perpendicular to a magnetic field of 02 wb m2 compute the flux through the
q an aircraft having awing of 10 m flies at a speed of 720 kmph if the vertical component of the earths magnetic field is 3 x 10-5 t calculate
what is the function of the myelin sheath do all axons present a myelin sheaththe function of the myelin sheath is to get better the safety and speed
q an aircraft having awing of 2048 m flies at a speed of 40 ms-1 if the vertical component of the earths magnetic field is 2 x 10-5 t compute
q define the unit of self inductanceone henry is described as the self-inductance of a coil in which a change in current of one ampere per second
q compute the mutual inductance between two coils when a current of 4 a changing to 8 a in 05 s in one coil induces an emf of 50 mv in the other coil
q define q- factor the q factor of a series resonant circuit is described as the ratio of the voltage across a coil or capacitor to the applied
q what is acceptor circuit give the uses of it acceptor circuit the series resonant circuit is frequently called an acceptor circuit by proffering
q a capacitor blocks dc but allows ac whycapacitive reactance xc 1omegac 1 2pinuc where nu is the frequency of the ac
q define rms value of ac rms value of ac the rms value of alternating current is described as that value of the steady current which when passed
q what are the various energy losses of a transformer energy losses in a transformer a hysteresis loss b copper loss c eddy current loss iron loss d
q what is efficiency of a transformer efficiency of a transformer is described as the ratio of output power to the input powereta output power input
q write the equation of a 25 cycle current sine wave having rms value of 30 adata nu 25 hz irms
q give the differences between af choke and rf choke audio - frequency af chokesradio frequency r f chokes or high frequency hf chokesa used in low
q what are the methods of inducing emf in a circuit the induced emf is able to be produced by changinga the magnetic induction bb area enclosed by
q define self inductance the coefficient of self induction of a coil is numerically equivalent to the opposing emf induced in the coil when the rate
q state flemings right hand rule flemings right hand rule the middle finger the forefinger and the thumb of the right hand are held in the three
q state lenzs law lenzs law declares that the induced current produced in a circuit always flows in such a direction that it opposes the change or
q state faradays laws of electromagnetic induction first lawat any time the amount of magnetic flux linked with a closed circuit changes an emf is
q what is electromagnetic induction the phenomenon of producing an induced emf because of the changes in the magnetic flux associated with a closed
q define magnetic fluxmagnetic flux phi the magnetic flux phi correlated with a surface held in a magnetic field b is defined as the number of