The full-scale deflecting torque of a 20 A moving-iron ammeter is 6 x 10¹5 N-m. What is the rate of change of self-inductance with respect to the deflection of the pointer of the ammeter at full scale?
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- Full scale deflecting torque of 10 A MI Ammeter is 5 x 10-5 N-m. The rate of change of self inductance of the instrument at full scale in "uH per radian" isThere is 50 mA of current through a coil with 250 turns. The flux is 150 µWb. What is the mmf? What is the reluctance of the circuit? A. Fm = 1.25 At - R=4.3x10-3 At/Wb B. Fm = 2.25 At - R=8.3x10-3 At/Wb C. Fm = 1.25 At - R=8.3x10-3 At/Wb D. Fm = 1.25 At - R=8.3x10-2 At/WbThe principle operation of LVDT is based on the variation of Select one a. Self inductance b. Reluctance c. Mutual inductance d. Permanence
- Magnetic field force lines created by the primary coil in transformers pass through the secondary coil and an induction current occurs in the secondary coil. What is the reason for induction current in the secondary coil?The self inductance of a coil is a. Inversely proportional to current b. Inversely proportional to flux c. Inversely proportional to number of turns d. Directly proportional to current10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °C
- The magnetic flux through each turns off a 100-turn coil is (³-2) milli-webers where t is in seconds. The induced EMF at t = 2 second is?Ip Ep=40 V f = 60 Hz N₂= 20- N₁ = 120 Find the maximum flux om om = Find the magnitude of the induced secondary voltage Es Es = units + Is Es units If the coefficient of coupling (k)= 0.75, determine the magnitude of the induced secondary voltage Es Esk=0.75 = unitsParamagnetic materials have relative permeability Equal to that ferromagnetic materials Slightly less than unity Slightly more than unity Equal to unity
- b1- The given ferromagnetic core relative permeability is 800. Determine the total reluctance of the core. 35 cm 10 cm 20 cm 50 cm 15 cm 45 cm 15 cm 15 cm 10 cmQuestion: 01 A three-legged circular core is shown in figure below. The winding on the left leg of the core (N) has 800 turns. The depth of the core is 10 cm. If the dimensions are as shown, then determine the total reluctance of the given core when u, = 500 and constant. 15ст N=800 50ст Scm 15ст 60cm 20cmPlease answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. The coil of a generator has an equivalent resistance of 1.5 ohms at 20 °C. After being used for several hours, the resistance is found to be 1.75 ohms. Determine the temperature of the coils at this time. The temperature coefficient of resistance at 0 °C of the coil is 0.004 OC-1.