A solenoidal inductor for a printed circuit board is being redesigned. To save weight, the number of turns is reduced by one-half, with the geometric dimensions kept the same. By how much must the current change if the energy stored in the inductor is to remain the same?
1.It must be four times larger.
2.It must be two times larger.
3.It should be left the same.
4.It should be one-half as large.
5.No change in the current can compensate for the reduction in the number of turns.
2
You might also like to view...
The SI unit H (the henry) is equal to a
A. V/m. B. V/A. C. V·s. D. V·s/A. E. V·A/s.
A buried power cable as described in Example Problem 3-15, is 0.46 inches in diameter and is 3 feet below grade. The cable will be expected to transmit 1200 amperes at 440 volts. Estimate the equilibrium temperature.
What will be an ideal response?
A 4.00-? resistor, an 8.00-? resistor, and a 24.0-? resistor are connected together
(a) What is the maximum resistance that can be produced using all three resistors? (b) What is the minimum resistance that can be produced using all three resistors? (c) How would you connect these three resistors to obtain a resistance of 10.0 ?? (d) How would you connect these three resistors to obtain a resistance of 8.00 ?? What will be an ideal response?
The output voltage of a power supply is V = Vo sin (120. t) volts. At t = 0.010 s the output voltage is 4.2 V. What is the rms voltage of the generator?
What will be an ideal response?