Question

Explain the following with reference to the magnetic field around a straight
conductor carrying current.
(i) Tracing the pattern of magnetic field
(ii) increasing the intensity of magnetic field
(iii) Reversing the direction of electric current,​

Answer 1

Answer:

The Magnetic field lines around a straight conductor carrying current are concentric circles whose centres lie on the wire. The direction of magnetic field lines can be determined using Right-Hand Thumb Rule.

\sf\purple{❒~Tracing~the~pattern~of~magnetic~field}❒ Tracing the pattern of magnetic field

The two ways to trace the magnetic field of a bar magnet is by a compass and by iron filings in the compass needle method, you need to let the needle rotate freely and trace it. In another way, you need to give the iron filings make the magnetic path foryou.

\sf\pink{❒~Increasing~the~intensity~of~magnetic~field}❒ Increasing the intensity of magnetic field

The strength of the magnetic field around a solenoid can be increased by: increasing the number of turns on the coil. increasing the current. placing an iron core inside the solenoid.

\sf\purple{❒~Reversing~the~direction~of~electric~current}❒ Reversing the direction of electric current

When you reverse the direction of the current flowing in the wire, the north and south poles are also reversed. When you reverse the current again, the north and south poles reverse again. In fact, each time the current is reversed, the north and south poles will exchange places.

Answer 2

Science model question paper 1 science 2021 with answers