Tag: field due to a current carrying conductor

Questions Related to field due to a current carrying conductor

Which of the following entities are closely associated to each other

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. Gravitation and nuclear fusion

  2. Electricity and magnetism

  3. Chemical Bonding and Planetary motion

  4. None

Show answer
Correct Option: B
Explanation:

Electric current and magnetism are very closely related phenomenon and both can be generated using the other.

Define Electromagnetism

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. The study of attraction or repulsion between two magnets is called electromagnetism

  2. The study of electric effects due to magnetic interaction is called electromagnetism

  3. The study of magnetic effects produced due to electric current is called electromagnetism

  4. The study of magnetic effects produced due to electric charge is called electromagnetism

Show answer
Correct Option: C
Explanation:

Electromagnetism is study of various phenomenon related to electricity and magnetism. 

Which of the following phenomenon can be related to electric current 

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. Magentism

  2. Gravitation

  3. Nuclear Fission

  4. Chemical Bonding

Show answer
Correct Option: A
Explanation:

Electric current and magnetism are very closely related phenomenon and both can be generated using the other.

The Magnetic effect of current was discovered by:

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. John Ambrose Fleming

  2. Hans Christian Oersted

  3. Michael Faraday

  4. André-Marie Ampère

Show answer
Correct Option: B
Explanation:
The magnetic effect of an electric current was discovered by Hans Christian Oersted in 1820. He demonstrated the effect by plotting compass close to a long straight wire which is carrying current and noting it's deflection. And the by reversing the direction of the current, the compass needle was deflected in the opposite sense.

How can you determine direction of magnetic field lines around a current carrying conductor

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. Left hand Thumb Rule

  2. Right Hand Thumb Rule

  3. By rotating the conductor

  4. Using sonometer

Show answer
Correct Option: B
Explanation:

Direction of magnetic field lines around a current carrying conductor can be found by RIght Hand Thumb Rule.

One metal wire is kept in east-west direction.  $I$  is the current flow due west. Then, due to magnetic field  $\vec { { B } }$  of the earth on the wire is in the........ Direction.

physics electromagnetism magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. downward

  2. Upward

  3. north

  4. south

Show answer
Correct Option: C
Explanation:
according to left hand rule. if current is in west direction then magnetic field will be north direction, if force is in north west direction

A moving charge produces

physics magnetic effects of electric current magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. Neither electric field nor magnetic field

  2. Electro-static field only

  3. Magnetic field only

  4. Both magnetic and electro-static field

Show answer
Correct Option: D
Explanation:

A charged particle produces an electric field around it independent of its motion. But when it is at rest, it doesn't produce a magnetic field. 

When it starts moving, it additionally produces a magnetic field too.

The magnetic lines of force due to straight current carrying conductor are:

physics magnetic effects of electric current magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop oersted experiment field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. circular lines

  2. straight lines

  3. concentric lines

  4. elliptical lines

Show answer
Correct Option: A

SI unit of permittivity of free space is:

physics moving charges and magnetism field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. Farad

  2. Weber

  3. ${ C }^{ 2 }{ N }^{ -1 }{ m }^{ -2 }$

  4. ${ C }^{ 2 }{ N }^{ -1 }{ m }^{ -1 }$

Show answer
Correct Option: C
Explanation:

Coulombic force between two charges is given by

F=1/4π€ (q'.q″/r²)

From here, the SI UNIT of permittivity comes out is

= coulomb²/Newton-meter²

C²/N-m²

If an electron is moving with velocity $\bar{v}$ produces a magnetic field $\bar{B}$, then

physics moving charges and magnetism field due to a current carrying conductor magnetic field due to a straight current carrying conductor magnetic field lines due to current

  1. the direction of field $\bar{B}$ will be same as the direction of velocity $\bar{v}$

  2. the direction of field $\bar{B}$ will be opposite as the direction of velocity $\bar{v}$

  3. the direction of field $\bar{B}$ will be perpendicular as the direction of velocity $\bar{v}$

  4. the direction of field $\bar{B}$ does not depend upon the direction of velocity $\bar{v}$

Show answer
Correct Option: C
Explanation:

According to Biot-Savart's law, the magnetic field
$\displaystyle \overset{\rightarrow}{B} = \frac{\mu _o}{4 \pi} . \frac{q (\overset{\rightarrow}{v} \times \overset{\rightarrow}{r} ) }{r^3}$
The direction of $\overset{\rightarrow}{B}$ will be along $\overset{\rightarrow}{v} \times \overset{\rightarrow}{r}$ i.e. perpendicular to the plane containing $\overset{\rightarrow}{v}$ and $\overset{\rightarrow}{r}$.