358714 Assertion :
Acceleration of a magnet falling through a long solenoid (or copper ring) decreases.
Reason :
The induced current produced in a circuit always flows in such direction that it opposes the change or the cause the produced it.

358715 A coil of resistance \(400 \Omega\) is placed in a magnetic field. If the magnetic flux \(\phi (Wb)\) linked with the coil varies with time \(t\) (second) as \(\phi=50 t^{2}+4\). The current in the coil at \(t=2 s\) is

358716 A small circular loop of wire of radius \(a\) is located at the centre of a much larger circular wire loop of radius \(b\). The two loops are in the same plane. The outer loop of radius \(b\) carries an alternating current \(I=I_{0} \cos (\omega t)\). The emf induced in the smaller inner loop is nearly?

358717 There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

358714 Assertion :
Acceleration of a magnet falling through a long solenoid (or copper ring) decreases.
Reason :
The induced current produced in a circuit always flows in such direction that it opposes the change or the cause the produced it.

358715 A coil of resistance \(400 \Omega\) is placed in a magnetic field. If the magnetic flux \(\phi (Wb)\) linked with the coil varies with time \(t\) (second) as \(\phi=50 t^{2}+4\). The current in the coil at \(t=2 s\) is

358716 A small circular loop of wire of radius \(a\) is located at the centre of a much larger circular wire loop of radius \(b\). The two loops are in the same plane. The outer loop of radius \(b\) carries an alternating current \(I=I_{0} \cos (\omega t)\). The emf induced in the smaller inner loop is nearly?

358717 There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

358714 Assertion :
Acceleration of a magnet falling through a long solenoid (or copper ring) decreases.
Reason :
The induced current produced in a circuit always flows in such direction that it opposes the change or the cause the produced it.

358715 A coil of resistance \(400 \Omega\) is placed in a magnetic field. If the magnetic flux \(\phi (Wb)\) linked with the coil varies with time \(t\) (second) as \(\phi=50 t^{2}+4\). The current in the coil at \(t=2 s\) is

358716 A small circular loop of wire of radius \(a\) is located at the centre of a much larger circular wire loop of radius \(b\). The two loops are in the same plane. The outer loop of radius \(b\) carries an alternating current \(I=I_{0} \cos (\omega t)\). The emf induced in the smaller inner loop is nearly?

358717 There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

358714 Assertion :
Acceleration of a magnet falling through a long solenoid (or copper ring) decreases.
Reason :
The induced current produced in a circuit always flows in such direction that it opposes the change or the cause the produced it.

358715 A coil of resistance \(400 \Omega\) is placed in a magnetic field. If the magnetic flux \(\phi (Wb)\) linked with the coil varies with time \(t\) (second) as \(\phi=50 t^{2}+4\). The current in the coil at \(t=2 s\) is

358716 A small circular loop of wire of radius \(a\) is located at the centre of a much larger circular wire loop of radius \(b\). The two loops are in the same plane. The outer loop of radius \(b\) carries an alternating current \(I=I_{0} \cos (\omega t)\). The emf induced in the smaller inner loop is nearly?

358717 There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then