Magnetic Effect...

The magnetic field inside a solenoid is:

The following diagram shows a spiral coil wound on a hollow cardboard tube AB. A magnetic compass is placed close to it. Current is switched on by closing the key. What will be the polarity at the ends A and B?

The adjacent diagram shows a small magnet placed near a solenoid AB with its north pole N near the end A. Current is switched on in the solenoid by pressing the key K. State the polarity at the ends A and B:

The adjacent diagram shows a small magnet placed near a solenoid AB with its north pole N near the end A. Current is switched on in the solenoid by pressing the key K. Magnet will get :

In the following figure, three path of a particle crossing a nucleus N are shown. The correct path is

A very long straight wire carries a current $$I$$. At the instant when a charge $$+Q$$ at point $$P$$ has velocity $$\overrightarrow{v}$$, as shown in figure, the force on charge is

A pair of slip rings is used in -

According to Fleming's Left Hand Rule, the ....... points in the direction of the magnetic field.

An electron having a charge $$e$$ moves with a velocity $$v$$ in X-direction. A magnetic field acts on it in Y-direction. The force on the electron acts in

The following diagram shows a spiral coil wound on a hollow cardboard tube AB. A magnetic compass is placed close to it. Current is switched on by closing the key. How will the compass needle be affected ? Give reason.