Home
Class 12
PHYSICS
The radii of two circular coils are 5 cm...

The radii of two circular coils are 5 cm and 10 cm and their number of turns are 40 and 100, respectively. The coils are coplanar and concentric and a 4 A current is sent through the first coil. Find the current and its direction through the second coil so that the magnetic field at thier centre becomes zero?

Text Solution

Verified by Experts

3.2 A in opposite direction
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROMAGNETISM

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER|7 Videos

  • ELECTROMAGNETISM

    CHHAYA PUBLICATION|Exercise MULTIPLE CORRECT ANSWERS TYPE|7 Videos

  • ELECTROMAGNETISM

    CHHAYA PUBLICATION|Exercise PROBLEM SET-II|20 Videos

  • ELECTROMAGNETIC WAVES

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|17 Videos

  • ELEMENTARY PHENOMENA OF ELECTROSTATICS

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE|2 Videos

Similar Questions

Explore conceptually related problems

The radii of two concentric circular coils are 8 cm and 10 cm and the number of turns in them are 40 and 10, respectively. A 5A current is passing through each of them In the direction. Determine the magnetic field produced at the centre of the two coils.

The radius of each of two circular coils of single turn is r. The two coils are placed parallel to each other with a common axis. The distance between their centres is (r)/(2) . If equal current is sent through the two coils in the same direction, what will be the magnetic field (i) at the centre of each coil and (ii) at the mid point on the line joining the centres of the coils? What is the ratio of these two magnetic fields?

Knowledge Check

  • Two circular coils of radii 10cm and 40cm are connected in series to a battery the ratio of magnetic fields at their centres is

    A
    1:4
    B
    4:1
    C
    2:1
    D
    1:1

    • Similar Questions

    Explore conceptually related problems

    If we double the radius of a current carrying coil keeping the current unchanged, the magnetic field at its centre will

    Two indentical circular coils, P and Q each of radius R, carrying currents 1A and sqrt(3)A resepectively. Are placed concentrically and perpendicular to each other laying in the XY and Yz planes. Find the magnitude and direction of the net magnetic field at the centre of the coils.

    The current through a circular conducting coil be doubled and the radius be halved then what change of magnetic field takes place in the centre of the coil?

    The number of turns in the primary and secondary coils of an ideal transformer are 140 and 280, respectively. If the current through the primary coils is 4 A, what will be the current in the secondary coil?

    In a compact coil of 50 turns, the current strength is 10 A and the radius of the coil is 25xx10^(-2)m . Find the magnitude of the magnetic field at its centre.

    In a compact coil of 50 turns, the current strength is 10A and the radius of the coil is 25xx10^2 meter. Find the magnitude of the magnetic field at its centre.

    A circular coil of radius 5 cm and of 100 turns is made of an insulated copper wire of diameter 0.4 mm. If current is sent through it by connecting its two ends with a battery of emf 2 V, what will be the magnetic field produced at its centre? Resistivity of cooper =1.76xx10^(-8)Omegam

    Home
    Profile