A rectangular loop of wire shown below is coplanar with a long wire carrying current \(I.\)
               
The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and right sides of the loop?

	Induced current	Force on left side	Force on right side
1.	counterclockwise	to the left	to the right
2.	clockwise	to the left	to the right
3.	counterclockwise	to the right	to the left
4.	clockwise	to the right	to the left

 

An electric potential difference will be induced between the ends of the conductor shown in the diagram when the conductor moves in the direction of:

1. P
2. Q
3. L
4. M

In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during this time is:
1. 5.0 coulomb
2. 4.0 coulomb
3. 1.0 coulomb
4. 0.8 coulomb

A long solenoid of diameter 0.1 m has 2$\times {10}^4$ turns per meter. At the centre of the solenoid, a coil of 100 turns and a radius of 0.01 m is placed with its axis coinciding with the solenoid's axis.  The current in the solenoid reduces at a constant rate from 0 A to 4 A in 0.05 s. If the resistance of the coil is $10{\pi }^{\mathrm{2 }}\Omega$, the total charge flowing through the coil during this time is:

1. 32$\mathrm{\pi \; \mu C}$

2. 16 $\mu C$

3. 32 $\mu C$

4. 16$\mathrm{\pi \; \mu C}$

A conducting square frame of side 'a' and a long straight wire carrying current i are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity v. The emf induced in the frame will be proportional to:
      
1. 1/x²
2. 1/(2x-a)²
3. 1/(2x+a)²
4. 1/(2x-a) x (2x+a)

In the figure shown a square loop $\mathrm{PQRS}$ of side $‘\mathrm{a}’$ and resistance $‘\mathrm{r}’$ is placed near an infinitely long wire carrying a constant current $\mathrm{I}$. The sides $\mathrm{PQ}$ and $\mathrm{RS}$ are parallel to the wire. The wire and the loop are in the same plane. The loop is rotated by $180°$ about an axis parallel to the long wire and passing through the midpoints of the side $\mathrm{QR}$ and $\mathrm{PS}$. The total amount of charge which passes through any point of the loop during rotation is:

The number of turns in a coil of wire of fixed radius & length is 600 and its self-inductance is 108 mH. The self-inductance of a coil of 500 turns will be:

1.  74 mH

2.  75 mH

3.  76 mH

4.  77 mH

A magnetic rod is inside a coil of wire which is connected to an ammeter. If the rod is stationary, which of the following statements is true?

A coil of resistance 20 $\Omega$ and inductance 5 H has been connected to a 200 V battery. The maximum energy stored in the coil is:

A magnet is brought towards a coil first (i) speedily (ii) slowly. It can be concluded that the induced e.m.f. and the induced charge in the two cases, will be respectively: