Home
Class 12
PHYSICS
Find the current in the wire PQ for the ...

Find the current in the wire PQ for the configuration shown in Fig.Wire PQ has negligible resistance.B, the magnetic field is coming out of the paper. `theta` is a fixed angle made by PQ travelling smoothly over two conducting parallel wires separated by a distance d.

Text Solution

Verified by Experts

The motional electric field E along the dotted line CD(`wedge` to both v and B and aolng VxB)=Vb
Therefore, the motional emf along PQ=(length PQ)x(Field along PQ)
`("length "PQ)xx(vBsintheta)`
`=((d)/(sintheta))xx(vBsintheta)=vBd`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NCERT EXEMPLAR ENGLISH|Exercise Long|11 Videos

  • ELECTROMAGNETIC INDUCTION

    NCERT EXEMPLAR ENGLISH|Exercise very short answer|6 Videos

  • ELECTRIC CHARGES AND FIELD

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Question|6 Videos

  • ELECTROMAGNETIC WAVES

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER|5 Videos

Similar Questions

Explore conceptually related problems

Find the current in the sliding rod AB (resistance = R) for the arranged shown in Fig. B is constant and is out of the paper. Paralllel wires have no resistance. upsilon is constant. Switch is closed at time t = 0.

Two very long, straight wires carrying, currents as shown in Fig. Find all locations where the net magnetic field is zero.

A current of 5.0 A exists in the circuit shown in The wire PQ has a length of 50 cm the magnetic field in which it is immersed has a magnitude of 0.20 T. Find the magnetic force acting on the wire PQ.

Current I flows through a long conducting wire bent at right angle as shown in Fig. Find the magnetic field at point P on the right angle bisector of the angle XOY at distance r form O.

Current I flows through a long conducting wire bent at right angle as shown in Fig. Find the magnetic field at point P on the right angle bisector of the angle XOY at distance r form O.

Find magnetic field at point P shown in Fig. point P is on the bisector of angle between the wires.

Consider the situation shown in . The wire PQ has a negligible resistance and is made to slide on the three rails with a constant speed of 5 cm s^(-1) . Find the current in the 10 Omega resistor when the switch S is thrown to (a) the middle rail (b) the bottom rail.

Consider the situation shown in . The wire PQ has a negligible resistance and is made to slide on the three rails with a constant speed of 5 cm s^(-1) . Find the current in the 10 Omega resistor when the switch S is thrown to (a) the middle rail (b) the bottom rail.

Prove that the force acting on a current carrying wire, joining two fixed points a and b in a uniform magnetic field, is independent of the shape of the wire.

A current of 10 A exists in the circuit figure.The wire PQ has a lengths of 100 cm and the magnetic field in which it is immersed has a magnitude of 0.20 T .Find the magnetic force acting on the wire PQ .