Advertisements
Advertisements
Question
The adjacent diagram shows a small magnet placed near a solenoid. State whether the magnet is attracted or repelled, as the switch is pressed. Give a reason.
Advertisements
Solution
As the switch is pressed, the magnet will get repelled. The reason is that at the face of solenoid near the north pole of a magnet, the current flows in an anti-clockwise direction, so the face becomes north pole. The like poles repel, so the magnet is repelled.
RELATED QUESTIONS
The figure shows a solenoid wound on a core of soft iron. Will the end A be a N pole or S pole when the current flows in the direction shown?
State two ways by which the magnetic field due to a current carrying solenoid can be made stronger.
Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.
What effect will there be on a magnetic compass when it is brought near a current carrying solenoid?
How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid?
A current carrying solenoid behaves like a ______.
What is a solenoid?
Derive the expression for the heat produced due to a current ‘I’ flowing for a time interval ‘t’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. With which name is the relation known? How much heat will an instrument of 12W produce in one minute if it is connected to a battery of 12V?
Under what conditions permanent electromagnet is obtained if a current carrying solenoid is used? Support your answer with the help of a labelled circuit diagram.
Observe the given figure of a current-carrying solenoid and write the labels of A and B correctly.
