Physics-
General
Easy

Question

Two coils are placed close to each other as shown in the figure. When the key K is pressed a current flows in the secondary coil abcd. What happens on breaking the circuit?

  1. No current flows in the coils S    
  2. A current greater in magnitude but same in direction flows through the coil    
  3. The magnitude of the current is greater but direction is reversed    
  4. The magnitude of the current is lower and direction is reversed    

The correct answer is: The magnitude of the current is greater but direction is reversed


    Conceptual

    Related Questions to study

    General
    Physics-

    A small piece of substance is repelled by a strong permanent magnet. The substance is

    A small piece of substance is repelled by a strong permanent magnet. The substance is

    Physics-General
    General
    Physics-

    What is the magnetic field at the center of circular loop in the circuit shown below? The wires crossing at P are insulated from each other.

    What is the magnetic field at the center of circular loop in the circuit shown below? The wires crossing at P are insulated from each other.

    Physics-General
    General
    Physics-

    A rectangular loop carries a current Io. It is placed near a long straight conductor carrying current I as shown in figure. What will be the nature of the force experienced by the coil?

    A rectangular loop carries a current Io. It is placed near a long straight conductor carrying current I as shown in figure. What will be the nature of the force experienced by the coil?

    Physics-General
    parallel
    General
    Physics-

    Figure shows three parallel wires carrying currents as shown. The force on the wire b is

    Figure shows three parallel wires carrying currents as shown. The force on the wire b is

    Physics-General
    General
    Physics-

    A circular coil is kept as shown in the figure horizontally. If a magnet falls freely from the above then the magnitude of induced current in the coil is

    A circular coil is kept as shown in the figure horizontally. If a magnet falls freely from the above then the magnitude of induced current in the coil is

    Physics-General
    General
    Physics-

    An infinite straight current carrying conductor is bent into a circle as shown in the figure. If the radius of the circle is R, the magnetic field at the center of the coil is

    An infinite straight current carrying conductor is bent into a circle as shown in the figure. If the radius of the circle is R, the magnetic field at the center of the coil is

    Physics-General
    parallel
    General
    Physics-

    ABCDEF is a regular hexagon. What is the value of stack A B with rightwards arrow on top plus stack A C with rightwards arrow on top plus stack A D with rightwards arrow on top plus stack A E with rightwards arrow on top plus stack A F with rightwards arrow on top

    ABCDEF is a regular hexagon. What is the value of stack A B with rightwards arrow on top plus stack A C with rightwards arrow on top plus stack A D with rightwards arrow on top plus stack A E with rightwards arrow on top plus stack A F with rightwards arrow on top

    Physics-General
    General
    Physics-

    The resultant of the three vectors stack O A with rightwards arrow on top comma   stack O B with rightwards arrow on top comma     text and end text   stack O C with rightwards arrow on top shown in figure.

    The resultant of the three vectors stack O A with rightwards arrow on top comma   stack O B with rightwards arrow on top comma     text and end text   stack O C with rightwards arrow on top shown in figure.

    Physics-General
    General
    Physics-

    In the figure, stack E with rightwards arrow on top   minus   stack D with rightwards arrow on top   plus   stack C with rightwards arrow on top equals

    In the figure, stack E with rightwards arrow on top   minus   stack D with rightwards arrow on top   plus   stack C with rightwards arrow on top equals

    Physics-General
    parallel
    General
    Physics-

    Elastic waves in solid are:

    Elastic waves in solid are:

    Physics-General
    General
    Physics-

    The magnetic field at a distance r from a long wire carrying current I is 0.4 tesla. The magnetic field at a distance 2r is

    The magnetic field at a distance r from a long wire carrying current I is 0.4 tesla. The magnetic field at a distance 2r is

    Physics-General
    General
    Physics-

    How much heat energy is gained when 5 kg of water at 20oC is brought to its boiling point (Specific heat of water = 4.2 kJ kg-1c-1)

    How much heat energy is gained when 5 kg of water at 20oC is brought to its boiling point (Specific heat of water = 4.2 kJ kg-1c-1)

    Physics-General
    parallel
    General
    Physics-

    Absolute zero (OK) is that temperature at which

    Absolute zero (OK) is that temperature at which

    Physics-General
    General
    Physics-

    The value of fraction numerator 1 over denominator 4 pi epsilon subscript 0 end subscript end fraction is

    The value of fraction numerator 1 over denominator 4 pi epsilon subscript 0 end subscript end fraction is

    Physics-General
    General
    Physics-

    A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. Then the work done by this force

    A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. Then the work done by this force

    Physics-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.