In the context of the loop and junction rules for electrical circuits, a junction is where three or more wires are joined.
Answer: Option 2
<u>Explanation:
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An electrical circuits consists of many points like branch, loop, junction, series, bridge, etc. So, loops are the ones where the output of one circuit will act as feedback of the same circuit. If two or more wires passes through a single point, then that point is termed as junction.
If two or three junction connect each other they are termed as branch. Like these several other parameters are there with different rules in the circuit system. For electrical circuits, junction and loop rules state that a junction is the point where more wires joined together.
Answer:
It decreases by a factor of 4
Explanation:
The gravitational force between two masses is given by

where
G is the gravitational constant
m1, m2 are the two masses
r is the separation between the two masses
In this problem, the distance between the masses is doubled, so
r' = 2r
Substituting into the equation, we see that the new force is

So, the force decreases by a factor of 4.
The net force on an object subject to friction is equal to the sum of the applied force and the frictional force.
Mathematically,

Here, m is mass of object and a is its acceleration. We take frictional force negative because it opposes the motion of object.
Given,
,
and 
Substituting these values in above formula, we get
.
Thus, the acceleration of an object is 