Answer:
The current flowing through the outer coils is
Explanation:
From the question we are told that
The number of turn of inner coil is
The radius of inner coil is
The current flowing through the inner coil is
The number of turn of outer coil is
The radius of outer coil is
For net magnetic field at the common center of the two coils to be zero the current flowing in the outer coil must be opposite to current flowing inner coil
The magnetic field due to inner coils is mathematically represented as
The magnetic field due to inner coils is mathematically represented as
Now for magnetic field at center to be zero
So
=>
Answer:
B
Explanation:
Because the main focus of cognitive psychology is on the metal processes that affect behavior
At a definite point, the bridge would begin oscillating to the matching rhythm as that
of the marching footsteps.
This oscillation would touch a determined peak when the bridge can
no longer tolerate its own
power and later collapses. So, soldiers are
systematic to break their steps
while passing a bridge.
Distance = (speed) x (time)
Distance = (0.5 m/s) x (2.3 s)
Distance = (0.5 x 2.3) m
Distance = 1.15 meters