In the given question they have not provided the dimensions of the coil so I assumed it to be very close to the wire and having negligible dimensions compared to the wire . Then EMF induced in the coil due to the current in the wire comes out as M*a . Which when divided by resistance gives...
My approach to this problem was pretty simple and straight.
There is no zero error here.
8 divisions of VS(Vernier scale)= 5 divisions on MS (Main Scale)
hence 1 VS division = 5/8 mm .
Now , MSR = 35 mm ( as zero of VS lies to the left of 36)
Least count = 1mm - 5/8 mm = 3/8 mm
According to this definition I am unable to understand why does surface tension acts tangentially to surface of contact of liquid and capillary tube. And is the force of surface tension balancing the adhesive forces which lead to capillary rise OR it is the reason behind the capillary rise?
This is an excerpt from a high school physics textbook. I don't understand the possible reason behind this statement. If we change something in the circuit say for example add a resistor , the current and hence the flux should change. Then why/how is this statement true?