Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. An 8 - pole dc generator has 500 armature conductors and has a useful flux per pole of 0.065 web. What will be the emf generated if it is lap connected and runs at 1000 r.p.m. What must be the speed at which it is to be driven to produce the same emf if it is wave wound?
Ans.
E1 = N1PΦZ/60A = 10000 × 0.065 ×500 × P/A
For lap connection A = P
E1 = 10000 × 0.065 ×500 /60 = 541.67 volts
E2 = N28ΦZ/60 × 2
Since E2 = E1
8N2ΦZ/60 × 2 = 8N1ΦZ/60 × 8
N2 = N1 × 2/8 = 1000 × 2/8 = 250 rpm
Q. A 300-kVA transformer has a core loss of 1.5 kW and a full-load copper loss of 4.5 kW. (a) Calculate its efficiency corresponding to 25, 50, 75, 100, and 125% loads at unity
List the four instructions which control the interrupt structure of the 8085 microprocessor. DI ( Disable Interrupts ) EI ( Enable Interrupts ) RIM ( Read Interrupt Masks
Can you explain how electrochemical grinding is advantageous over conventional grinding? How metal is moved in electrochemical grinding? What is the basic principle of electroch
Name the materials used in case of Solder and give reasons. Solder : For soft solders tin, lead (in 50-50 ratio) alloy and for hard solders copper- zinc and silver alloy
hi I need information of Compressor Shaft Impellers Coupling Hub Thrust Collars Balance Drum for centrifugal compressor with pecture
Q. Explain Power-System Loads? Figure represents a one-line (single-line) diagram of a part of a typical three-phase power system. Notice the symbols that are used for generato
Role of ERCs: A National Electricity Policy is one of the key instruments for providing policy guidance to the Electricity Regulatory Commissions in discharge of their functio
Discuss classification of conducting materials into low resistivity and high resistivity materials. Conducting materials are categorized as low resistivity materials and high r
Is there an opto-coupler that has a blocking voltage, VRRM, of greater than 800 volts? Perhaps, 1200 or 1600 volts? The manufacturer?
Objective of Long-Term Plans for Technical Loss Reduction The primary objectives of strengthening and improvement of sub-transmission and distribution system in the long-term
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd