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1. For the flyback converter operating in the discontinuous "current" (flux) mode, derive an expression for the time at which the magnetizing current returns to zero.
2. A forward converter with a demagnetizing winding is designed to operate with a maximum duty cycle of D = 0.7. Calculate the voltage rating of the switch in terms of the input voltage.
The no-load and blocked-rotor tests on a three phase, wye-connected induction motor yield the following results: • No-load test: line-to-line voltage 400 V, input power 1770 W,
Q. What are the different types of dc generation according to the ways in which fields are excited. Show the connection diagram of each type. Ans. Types of D.C.
What are the features used mode 2 in 8255? The single 8-bit port in-group A is available. 1. The 8-bit port is bi-directional and additionally a 5-bit control port is availa
Explain the suitability of copper that is used as electrical conducting materials. Copper : Pure annealed is utilized for the winding of electrical machines. High pur
Commercial television broadcasting is allocated frequencies that fall in the VHF and UHF bands. Table lists the television channel allocations in the United States, with the channe
A circular ring of magnetic material has a mean length of 1m and a cross sectional area of .001m^2.A sawcut of 5mm width is made in the ring . calculate the magnetizing current req
Explain explanatory notes on comparison of RS232C and RS422A standards. Comparison of RS232C and RS422A standards: RS232C 1. Standard explained for asynchronous commu
Q. Two three-phase generators are supplying to a common balanced three-phase load of 30 kW at 0.8 power factor lagging. The per-phase impedance of the lines connecting the generato
SID Input Serial input data single bit can be accepted through this pin using RIM command discussed in details in chapter8.
Hall Effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D)Solders. Ans: Hall Effect is associated with semiconductors.
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