Physics-
General
Easy
Question
.A pair of parallel conducting rails lie at right angles to a uniform magnetic field of 
as shown in the fig. Two resistors 
and 
are to slide without friction along the rail. The distance between the conducting rails is 
. Then
- Induced current
directed clockwise if resistor is pulled to the right with speed 
and 
resistor is held fixed - Induced current
directed anti-clockwise if resistor is pulled to the right with speed and resistor is held fixed - Induced current directed clockwise if resistor is pulled to the left at and
resistor is held at rest - Induced current directed anti-clockwise if resistor is pulled to the left at and resistor is held at rest
- Induced current directed clockwise if resistor is pulled to the right with speed and resistor is held fixed
- Induced current directed anti-clockwise if resistor is pulled to the right with speed and resistor is held fixed
- Induced current directed clockwise if resistor is pulled to the left at and resistor is held at rest
- Induced current directed anti-clockwise if resistor is pulled to the left at and resistor is held at rest
The correct answer is: Induced current directed anti-clockwise if resistor is pulled to the left at and resistor is held at rest
resistor is pulled left at 
induced 
in the said resistor 
Resistor is at rest so induced in it 
be zero
Now net in the circuit 
and equivalent resistance of the circuit 
Hence current 
And its direction will be anti-clockwise (according to Lenz’s law)
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