Question
Two identical circular current-carrying loops, placed
coaxially, carry the same current i in the same direction . As the loops are brought closer to each other, what will happen to the current in each loop?Solution
Given:
- Two identical circular loops
- Carry same current i in same direction
- Placed coaxially (on the same axis)
Thus, the mutual inductance MMM between the loops increases . Now, by Lenz’s law :
- Any change that tends to increase magnetic flux opposes the original current.
- So, when mutual inductance MMM increases, to oppose the increased flux, an induced emf is created which tries to decrease the original current.
In the question below some statements are given followed by two conclusions I and II. You have to take the given statements to be true even if they se...
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decid...
Statements:
Only buses are cars
Only a few buses are trains
No train is a bike
Conclusions:
I. Some cars is being bik...
Statements:Â
Some heights are weight.
Some weight are tall.
Some tall are short.
Conclusions:Â
I. No height is tall.
II. Some heights are tall.
Statement:
Only a few Lion is Leopard.
All Leopard is Tiger.
Some Leopard is Onion.Â
Conclusion:
I. No Tiger ...
Statement:Â
Only car are bus.
No bus is train.
Only bike are train.
Conclusion:
I. No train is car.
II. S...
Statement:
Some buckets are mugs.
Some mugs are tubs.
All tubs are plastics.
No plastics is a white.
Conclusion: <...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
Statements:
Mostly animals are birds
No bird is reptile
Few reptiles are amphibians.
Conclusions:
I. All amphibians b...
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