Physics
Which of the following statements is not true ?
- The strength of magnetic field due to a bar magnet can be changed.
- A solenoid behaves like a bar magnet i.e. it attracts iron filings.
- The magnetic field increases if a soft iron core is placed along the axis of solenoid.
- The magnetic field lines inside the solenoid are nearly straight and parallel to the axis of solenoid.
Related Questions
According to the right hand thumb rule, the thumb points in the direction of …………… and fingers encircle the wire in direction of ……………
- magnetic field lines, current
- electric field lines, current
- current, magnetic field lines
- none of the above
In the figure given below, the direction of current in the loop is …………… . So, it behaves as a …………… .
- anticlockwise, south pole
- anticlockwise, north pole
- clockwise, north pole
- clockwise, south pole
Which of the following statements is not true for an electromagnet ?
- It is made of soft iron.
- Its magnetic field strength can be changed.
- The polarity of an electromagnet cannot be changed.
- It can easily be demagnetised.
The magnetic field lines inside a solenoid are :
- parallel and circular
- straight and parallel to the axis of solenoid
- straight and perpendicular to the axis of solenoid
- circular