Calculate the current
through the galvanometer when a potential difference of 10 V is maintained
across AC as shown in the image.
SOLUTION:
KIRCHHOFF'S SECOND LAW:
Kirchhoff's subsequent(second) law is otherwise called Voltage law (OR) Loop law.This law depends on LAW OF CONSERVATION OF ENERGY.Kirchhoff's subsequent law expresses that " THE ALGEBRAIC SUM OF ALL THE POTENTIAL DIFFERENCES ALONG A CLOSED LOOP IS ZERO".
CONVENTIONS:
Accept any course (direction) as the heading of traversal (direction of traversal). (Either clockwise or anticlockwise)
EMF of the cell is POSITIVE in the event that the bearing of the crossing (direction of the traversal) is from its NEGATIVE terminal to POSITIVE terminal. (NPP)
EMF of the cell is NEGATIVE assuming the heading of the crossing (direction of the traversal) is from its POSITIVE terminal to NEGATIVE terminal of the battery. (PNN)
The IR item is taken as POSITIVE on the off chance that the resistor is crossed a similar way as the expected to be current. (If the resistor is traversed in the same direction as the assumed current.)
NEET PHYSICS TEST ARRANGEMENT: QUESTION: A body weighs 72 N on the surface of the earth.What is the gravitational force on it, at a height equal to half the radius of the Earth. [A] 48 N [B] 32 N [C] 30 N [D] 24 N ANSWER: ANSWER - [B] SOLUTION: GRAVITATIONAL FORCE: Earth’s gravity comes from all its mass. All its mass makes a combined gravitational pull on the mass of other body. Objects with more mass have more gravity. Gravity gets weaker with distance. That is given by the Newton’s universal law of gravitation which states that ‘Every body on the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the mean distance between them’. EXAMPLES: The gravitational pull on the moon pulls the seas towards it causing the ocean tides. The sun’s gravity keeps earth in orbit around it. GRAVITATION...
Comments
Post a Comment