Question
Consider the situation described in the previous problem. Suppose the current i enters the loop at the point A and leaves it at the point B. Find the magnetic field at the centre of the loop.
✓
Answer
$\overrightarrow{\text{B}}$ due t BC$\overrightarrow{\text{B}}$ due to AD at Pt ‘P’ are equal ore Opposite
Hence net $\overrightarrow{\text{B}}=0$
Similarly, due to AB & CD at P = 0
$\therefore$ The net B at the Centre of the square loop = zero
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Define 1 henry.
An arbitrary surface encloses a dipole. What is the electric flux through this surface?
Does a gas have just two specific heat capacities or more than two? Is the number of specific heat capacities of a gas countable?
Which of the statements is true for p-type semiconductos.
- Electrons are majority carriers and trivalent atoms are the dopants.
- Electrons are minority carriers and pentavalent atoms are the dopants.
- Holes are minority carriers and pentavalent atoms are the dopants.
- Holes are majority carriers and trivalent atoms are the dopants.
Mark the correct statements:
- Equations of special relativity are not applicable for small speeds.
- Equations of special relativity are applicable for all speeds.
- Nonrelativistic equations give exact result for small speeds.
- Nonrelativistic equations never give exact result.
Is the ratio of frequencies of ultraviolet rays and infrared rays in glass more than, less than or equal to 1?
A ball is dropped on a floor from a height of 2.0m. After the collision it rises up to a height of 1.5m. Assume that 40% of the mechanical energy lost goes as thermal energy into the ball. Calculate the rise in the temperature of the ball in the collision. Heat capacity of the ball is $800JK^{-1}$.
→In a TV tube, electrons are accelerated from the rear to the front. What is the direction of the current?
Where on the surface of Earth is the angle of dip $90^{\circ}$?
→Write the relation between object distance ( $u$ ), image distance $(v)$ and focal length $(f)$ for a concave mirror.
→