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!
Power is to be supplied from a source whose resistance is 20 K ? to a load of 100 ?. Would you consider it as a constant voltage source or current source? Explain.
Ans.
Given source is considered as a constant current source because, a source that has a very high internal resistance (20 K?) as compared to the load resistance (100 ?) is a constant current source.
Explanation: In figure below, a load impedance ZL is connected to a current source. Let It be the short-circuit current of source, and Zs be its internal impedance. Current IS is splitted into two parts IL through ZL and I1 through ZS. That is
IS= I1+ IL
Or I1= IS- IL
Because impedance Zs and ZL are in parallel, voltage drop across each must be equal, i.e.,
The above equation determines us that load current IL would remain almost the same as current IS, provided the ratio ZL/ZS= 100/20000 = 1/200 is small compared to unity. Source then behaves as a good current source. Or we can say, the larger the value of internal impedance ZS (20K?) compared to load impedance ZL (100?), the smaller is the ratio ZL/ZS, and better it works as a constant current source.
When throwing a baseball, a force is exerted by the hand on the ball. a. Is this force a contact force or a field force? Contact Force b. Throwing a ball 6 m straight upwa
Object Located Between the Center of Curvature and the Focal Point Ray diagrams are meaningful tools for denoting the location of an image as generates through a concave mirror
What are the safety terms to be inspected on Rotary Junction Box? Ans: Safety terms to be checked on rotary junction box are full tightness of all terminal connections, main
insyrumentation
For the circuits shown in Figure the resistors show the internal resistance of the batteries. Find, in each case: (i) The total e.m.f. across PQ (ii) The total equivalent in
The drag on a 30-ft long, vertical, 1.25-ft diameter pole subjected to a 30 mph air wind is to be determined with a model study. It is expected that the drag is a function of the p
Elastic limit is the upper limit of deforming force up to which, if deforming force is swap, the object regains its real form totally and after that limit, if deforming force is en
What is Friction? When we think about friction, there is one more place for energy to go - heat. When you push a book across a table, does the energy of the book change? Not if
A simple jack screw Bore a hole by a block of wood to fit a carriage bolt. Choose a bolt that is threaded nearly its whole length. Sink the head of the bolt in the wood, so tha
Find the value of g by free fall method.
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