Is = 10 Arms Determine the instantaneous energy stored in the transformer wirings at t=0. The frequency of the current Is is 1000 rad/s. IS ww 6 Ω j5Q j100 j140 10 Ω
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- A Volt ac voltage is applied to the primary input of a transformer. A load of B ohms at the output it depends. Since the primary spiral number of the transformer is C and the secondary spiral number is C, the primary current is, Find the secondary voltage and secondary current. A= 752 B=257 C=257 Ç= 16SOLVE STEP BY STEP IN DIGITAL FORMAT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 4. A 100 KVA, 2200 / 220 v, 50 cps transformer has the following constants: Rp = 0.42 Ω, Xp = 0.72 Ω, Rs = 0.0035 Ω and Xs = 0.070 Ω. Calculate the % regulation for the following cases a) At fp = 1 b) At fp = 0.8 behind c) At fp = 0.8 aheadThe net cross section of a transformer is 20 square inches. The maximum flux density is 11 kilogausses. The frequency is 60 Hz. If there are 1,000 turns in the primary, determine the primary induced emf. 3780 V 3945 V 3590 V 3850 V
- The net cross section of a transformer is 20 square inches. The maximum fluxdensity is 11 kilogausses. The frequency is 60 Hz. If there are 1,000 turns in theprimary, determine the primary induced emf.Help me to solve the average current, peak current, transformerThe apparent power of a transformer is given as S = 150MVa and its conversion ratio as 13.5kV / 55kV and short circuit reactance x = 0.2pu. Short of transformer for base values of 66kV 100MVA. what will be the new value of circuit reactance? A)x=0.20833 B)x=0.46296 C)x=0.192pu D)x=0.046296pu E)x=0.09259
- A 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be constant, the applied voltage should be ?i) What is Electromagnetic Induction (EMI)? Differentiate a transformer with agenerator. ii) Richard is gliding on his skateboard at 4.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Richard’s mass is 50 kg, and the mass of the skateboard is 5.0 kg.A 100kva, 2400/240V, 60Hz transformer has the following data: R1=0.46Ω, X1=0.76,R2=0.0038Ω and X2=0.0068Ω. (a) determine the equivalent resistance referred to the primary in ohms, (b) determine the equivalent reactance referred to the primary in ohms,(c) determine the equivalent impedance referred to the primary in ohms Subject Electrical Apparatus and Devices
- 1. In a transformer, which options are correct:A. Works on Faraday’ law and Ampere’s lawB. DC current in the primary winding will produce voltage output in the secondary windingC. Copper losses are caused by reluctance in magnetic circuitD. Frequency of input power source will not govern the voltage induced in secondary circuit.2. Voltage ratio of input voltage and output voltage in IDEAL transformer depends on:A. Leakage fluxB. Magnetization currentC. Copper loss currentD. Turns ratio3. The core of transformer must have:Q17/ choose the correct answer The potential transformers are generally step down transformers. Select one: True FalseA 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be same, the applied voltage should be ?