Answer
Verified109.2k+ views
Hint: You can identify the polarity induced at the ends A and B in the given figure by applying right hand thumb rule. Therefore, get an idea about the right hand thumb rule and how it can be applied. So that you can identify the polarity induced at the given ends.
Complete step by step solution:
By observing the given figure, you can see the u-shaped soft iron bar AB. When the switch is kept pressed in on position, current starts flowing in the coils around the soft iron, so that the soft iron acts as an electromagnet.
We can say that there is an insulated copper wire which is wrapped on a soft iron piece. When the current is allowed through the coil, electrons flow through it. Current is passed using a battery and a key. Then the iron piece behaves and acts like a bar magnet until the current flow is stopped.
By using right hand thumb rule, we can say the polarity that is induced at the ends A and B when the switch is kept on is A is having south polarity whereas B is having north polarity.
Note: In the right hand thumb rule, we use the thumb, index and middle fingers at right angles to each other to find out the direction. The iron piece which behaves as a bar magnet when current is passed then is called an electromagnet.
Complete step by step solution:
By observing the given figure, you can see the u-shaped soft iron bar AB. When the switch is kept pressed in on position, current starts flowing in the coils around the soft iron, so that the soft iron acts as an electromagnet.
We can say that there is an insulated copper wire which is wrapped on a soft iron piece. When the current is allowed through the coil, electrons flow through it. Current is passed using a battery and a key. Then the iron piece behaves and acts like a bar magnet until the current flow is stopped.
By using right hand thumb rule, we can say the polarity that is induced at the ends A and B when the switch is kept on is A is having south polarity whereas B is having north polarity.
Note: In the right hand thumb rule, we use the thumb, index and middle fingers at right angles to each other to find out the direction. The iron piece which behaves as a bar magnet when current is passed then is called an electromagnet.
Recently Updated Pages
If x2 hx 21 0x2 3hx + 35 0h 0 has a common root then class 10 maths JEE_Main
The radius of a sector is 12 cm and the angle is 120circ class 10 maths JEE_Main
For what value of x function fleft x right x4 4x3 + class 10 maths JEE_Main
What is the area under the curve yx+x1 betweenx0 and class 10 maths JEE_Main
The volume of a sphere is dfrac43pi r3 cubic units class 10 maths JEE_Main
Which of the following is a good conductor of electricity class 10 chemistry JEE_Main