Lenz's Laws and Conservation of Energy

Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in
 

The variation of emf with time is best represented by: [considering clockwise sense to be positive]

Out of the following given loops in which loop, the direction of induced current is from $a\to c\to b$

Current from A to B in the straight wire is decreasing. The direction of induced current in circular loop will be :

A magnet is placed along axis of the fixed ring which is earthed, at a distance from its center such that the nearer pole is north pole as shown in figure. A sharp impulse is applied on the magnet so that it starts to move towards the ring. Then,

(Consider gravity free space.)

An aluminium ring B faces an electromagnet A. The current I through A can be altered

A small magnet M is allowed to fall through a fixed horizontal conducting ring R. Let g be the acceleration due to gravity. The acceleration of M will be

1.$<g$ when it is above R and moving towards R

2. $>g$ when it is above R and moving towards R

3. $<g$when it is below R and moving away from R

4. $>g$ when it is below R and moving away from R

 Which of the above atatement is correct?

A magnet falling vertically under gravity, passes through a metal ring on its way. Which of the following is true about the acceleration $a$ of the magnet ? (where $g$ denotes the acceleration due to gravity)

Two bar magnets A and B, and a non-magnetic bar $\mathrm{C}$, all of same mass and dimensions, are dropped in an identical manner one by one through the center of a copper loop held horizontally (as shown in the figure). The times taken by the bars $A, B$, and $C$ to reach the ground are $t_A,t_B$, and $t_C$, respectively. Which of the following relations is correct?

An electron moves along the line $AB,$which lies in the same plane as a circular loop of conducting wires as shown in the diagram. What will be the direction of current induced if any, in the loop?

A movable wire is moved to the right, that causes an anti-clock-wise induced current as shown in the figure. The direction of magnetic induction in the region P points

Lenz 's law used to find out the direction of

Lenz's law is a consequence of the law of conservation of

A small bar magnet $A$ is falling vertically downward through a fixed horizontal conducting ring $R$ as shown. If $g$ be the acceleration due to gravity, then the acceleration of $A$ will be

A to B are two metallic rings placed at opposite sides of an infinitely long straight conducting wire as shown. When the current in the wire is slowly decreased, what will be the direction of induced current ?

A metallic ring with a small cut is held horizontally and a magnet is then allowed to fall vertically through the ring. Then what must have been the acceleration of the magnet ?

As shown in the above figure, a magnetic field is directed into the plane of the coil $\mathrm{ABCD}$. If the field is increasing at a constant rate, then find the directions of induced currents in wires $\mathrm{AB}$ and $\mathrm{CD}$, respectively:

As shown in the above figure, a magnet is pushed towards a fixed ring along its axis until the magnet passes through the ring. Now, choose the correct statement from the following:

Lenz's law is based on conservation of

The Lenz law is consequence of conservation of