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 emf of 24.0 V is applied to a coil with an inductance of 58.0 mH and a resistance of 0.41 Ω.
a) Determine the energy stored in the magnetic field when the current reaches one fourth of its maximum value.
b) How long does it take for the current to reach this value?
Answer: a)The maximum current, after a long time has elapsed, will be 24/0.41 = 58.5A. A quarter of this is 14.63A. Energy stored in an inductor is 0.5*L*I^2 = 6.21J
b) you can use I(t)/ Imax =1 - exp(-t*R/L) where I(t) is the current at time t (14.63A), Imax is the maximum current (58.5A), R is the resistance, L the inductance
0.75 = exp(-t*7.07)
t*7.07= 0.288
t = 40.7ms
A mass of 150 g of hot coffee at 90.0 oC is poured into an insulated cup containing 220 g of ice initially at 0.0 oC. how much ice will remain
a transverse wave traveling on a string is represented by yx 0.48cos5.6x84t. yx is measured in cm above or below
A placekicker must kick a football form a point 36.0 (about 40 yards) from the goal. By how much does the ball clear or fall short of clearing the crossbar
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, What is the increase in the entropy of the universe
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it isrotating at 9 rev/s. 50 revolutions later, its angular speed is19 rev/s.
A starship is circling a distant planet of radius R. The astronauts calculate that the free-fall acceleration at their altitude is half the value at the planet's surface. Find how far above the surface are they orbiting
A certain drawbridge can be modeled as a uniform 1.60×104N bar, 10.0m long, pivoted about its lower end. When this bridge is raised to an angle of 60.0 above the horizontal, the cable holding it suddenly breaks, allowing the bridge to fall. At the..
The position of a particle moving along an x axis is given by x = 14.0t2 - 3.00t3, where x is in meters and t is in seconds. find the maximum positive velocity reached by the particle
Crossfire was a popular board game in which players attempted to propel a "puck" forward towards their opponet's side by shooting metal balls at it. What is the maximum speed a player can impart to the puck
An old Chrysler with mass 2000 kilogram is moving along a straight stretch of road at 88 km/h. Find how fast is the center of mass of the two cars moving
An elevator undergoes constant upward acceleration, taking it from rest to 12.8m/s in 4.0 s. A 60kg man stands on a scale in the elevator. What does the scale read during the upward acceleration
In one day, a 90kg mountain climber ascends from the 1520m level on a vertical cliff to the top at 2360m, What is her change in gravitational potential energy on the first day
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd