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!
D.C. Generator
A magnetic field is produced by afield coil supplied with a D.C. current and a rotor is placed between shaped pole pieces and wound with an armature winding. The diagram above shows only one turn of the armature winding, but in practice there will usually be more than one. The ends of the armature winding are connected to two slip rings that rotate with the armature and the voltage generated is 'picked off' the rings by brushes that bear against the slip rings
The emf generated may be calculated either using the equation for the emf induced in a conductor of length l moving
in an electric field of flux density B webers/m 2
e=B.l.v
with a velocity v m/sec or by considering the rate of change of flux linkage with the armature coil. We shall use the latter method. Due to the shaping of the pole pieces, the flux threading through a particular armature coil is constant at + max as it turns from O4 to O1 and decreases linearly from +Ømax to -Ømin while the rotor is turning from O1 to O2 . It is constant again during O2 to O3 and then increases linearly during O3to O4. (ref graph)
Q. An inverting amplifier is designed with three inputs, v 1 , v 2 , and v 3 , as shown in Figure. Determine the output voltage. Then indicate how the circuit may be modified to pe
A series RLC circuit consisting of resistor of 200 ohms, an inductor of 0.214H and a capacitor of unknown value. When this circuit is energized by 240 i) value of capacitor ii) vol
Q. What do you mean by Binary Multiplication? The Rules of Binary Multiplication 0 x 0 = 0 0 x 1 = 0 1 x 0 = 0 1 x 1 = 1 , and no carry or borrow
Assume a ray of light is incident on a smooth reflecting surface at an angle of incidence of 15 degrees to the normal. What is the angle between the incident ray and the reflected
Merits: The circuit has the trend to stabilize operating point against changes in temperature and β-value. Demerits: In this type of circuit, to keep I C independent o
when MT 2 and Gate is Negative In this case gate current flows through P 2 N 3 junction. Junction N 1 P 2 forward biased hence the triac starts conduction through P
Q. Explain Shunt-field control process? Shunt-field control, armature-resistance control offers a constant-torque drive because both flux and, to a first approximation, allowab
explain storage oscilloscope?
Q. (a) In the circuit shown in Figure the zener diode (with zero zener resistance) operates in its reverse breakdown region while the voltage across it is held constant at VZ and t
Atomic weight of an atom is (A) Sum of the number of protons and neutrons. (B) Sum of the number of protons and electrons. (C) Sum of the number of electrons and n
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