Answer:
675 A
Explanation:
B = 1.5 x 10^-8 T
r = 9 km = 9000 m
Let the current be i
The formula for the magnetic filed due to a very long straight conductor is given by


i = 675 A
Answer:
Explanation:
Given
Mechanical Energy of Spring-Block system is 1 J
Maximum Amplitude is 
maximum speed 
Suppose
be general equation of motion of spring-mass system
where A=max amplitude
=Natural frequency of oscillation
t=time



maximum kinetic Energy must be equal to total Mechanical Energy when spring is un deformed i.e. at starting Position


Also
is also given by


where k= spring constant


Answer:
Hyperbole
Explanation:
this is an extreme exaggeration or overstatement/ magnification