Science
Refer to the image below and state how the magnetic field pattern indicates regions where the magnetic field is stronger outside the magnet? What happens to the magnetic field when the current in the circuit is reversed?
Electro-Magnetism
48 Likes
Answer
The magnetic field strength is more in the region where the field lines are crowded. This indicates that the field strength is maximum near the poles and it reduces as we go away from the poles.
When the direction of current in the circuit is reversed the direction of the magnetic field is also reversed.
Answered By
28 Likes
Related Questions
The refractive indices of three media are given below:
Medium Refractive Index A 1.6 B 1.8 C 1.5 A ray of light is travelling from A to B and another ray is travelling from B to C.
(a) In which of the two cases the refracted ray bends towards the normal?
(b) In which case does the speed of light increase in the second medium? Give reasons for your answer.
A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this parallel combination is R1, what is the value of the ratio R1 : R?
Study the food chain given below and answer the questions that follow
(a) If the amount of energy available at the third trophic level is 100 joules, then how much energy will be available at the producer level? Justify your answer.
(b) Is it possible to have 2 more trophic levels in this food chain just before the fourth trophic level? Justify your answer.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
MnO2 (s) + Al(s) ⟶ Mn(l) + Al2O3(s) + Heat
(a) Give reason why the above reaction is known as a thermite reaction.
(b) Identify the substance oxidised and reduced in the above reaction.
(c) Give a reason why Aluminium is preferably used in thermite reactions.