Answer:62.5 J
Explanation:
Given
Inductance(L)=5 H
resistance(R)
Voltage(V)=100 V
Current in L-R circuit is given by
![I=I_0\left [ 1-e^{-\frac{Rt}{L}}\right ]](https://tex.z-dn.net/?f=I%3DI_0%5Cleft%20%5B%201-e%5E%7B-%5Cfrac%7BRt%7D%7BL%7D%7D%5Cright%20%5D)
and Power=i^2R+Li\frac{di}{dt}[/tex]
For Steady state i.e. at
Energy Stored is 
W=1/2cvsqr....1/2*25*10^-6*144
0.0000125*144=0.0018=18micro farad
Answer:
The answer is below
Explanation:
i) Since the length of the second clock (radius) is 14 cm = 0.14 m, the distance covered by the second hand in one revelution is:
Distance covered = 2πr = 2π(0.14) = 0.88 m
The time taking to complete one revolution = 60 seconds, hence;
Speed = distance covered in one revolution / time take o complete a revolution
Speed = 0.88 m / 60 s = 0.0147 m/s
ii) Distance covered in 150 s = speed * 150 s = 0.0147 * 150 = 2.2 m
iii) Displacement in 150 seconds = distance from initial position to final position
At 150 s, the hand has covered 2 revolutions and moved 30 s. Hence:
Displacement in 150 seconds = speed * 30 s = 0.0147 * 30 = 0.44 m
Option B makes the most sense. Option A is something you acquire, it wouldn't really cost anything. Utilities usually do not cost more than housing. Savings are subjective, dependent on the person. So option B.
Hope it helps!
