Aloop circuit has a resistance of r1 and a current of 1.8 a. the current is reduced to 1.6 a when an additional 3.8 ω resistor is added in series with r1. what is the value of r1? assume the internal resistance of the source of emf is zero. answer in units of ω.

Value of

Explanation:

We have given

In first case resistance is and current is 1.8 A

Let the potential difference is v

So ----eqn 1

In second case resistance is and current is 1.6 A and potential difference will be as it is a series connection

So ----eqn 2

From eqn 1 and eqn 2

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft