Advertisements
Advertisements
Question
Predict the direction of induced current in the situation described by the following figure.
Advertisements
Solution
Lenz's law specifies the direction of the induced current in a closed loop. Using Lenz’s rule, the direction of the induced current in the given situation can be predicted as follows:
As the current increases, the inner side of loop-1 becomes the south pole. Consequently, the loop's inside should Lenz claim that it will also turn into the south pole law.
The direction of the induced current is along yzxy.
RELATED QUESTIONS
2 A 40 kg boy whose legs are 4 cm in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can withstand stress of 0.9 x 108 N/m2. The Young's modulus for the material of the bone is ______.
There are two coils A and B as shown in figure. A current starts flowing in B as shown, when A is moved towards B and stops when A stops moving. The current in A is counterclockwise. B is kept stationary when A moves. We can infer that ______.
Same as problem 4 except the coil A is made to rotate about a vertical axis (figure). No current flows in B if A is at rest. The current in coil A, when the current in B (at t = 0) is counterclockwise and the coil A is as shown at this instant, t = 0, is ______.
Consider a magnet surrounded by a wire with an on/off switch S (Figure). If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit? Explain.
Consider a metal ring kept on top of a fixed solenoid (say on a carboard) (Figure). The centre of the ring coincides with the axis of the solenoid. If the current is suddenly switched on, the metal ring jumps up. Explain
A conducting wire XY of mass m and neglibile resistance slides smoothly on two parallel conducting wires as shown in figure. The closed circuit has a resistance R due to AC. AB and CD are perfect conductors. There is a ˆ. magnetic field `B = B(t)hatk`.
- Write down equation for the acceleration of the wire XY.
- If B is independent of time, obtain v(t) , assuming v(0) = u0.
- For (b), show that the decrease in kinetic energy of XY equals the heat lost in R.
Predict the direction of induced current in the situation described by the following figure.
Use Lenz’s law to determine the direction of induced current in the situation described by the figure.
A circular loop being deformed into a narrow straight wire.
In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:
In the diagram given below, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:
How is Lenz's law related to the Law of Conservation of Energy?
What do Faraday's laws and Lenz's law form together?
Which expression incorporates Lenz's law into Faraday's law?
Which apparatus is used to observe the induced current when a magnet moves relative to a coil?
When the N-pole moves towards the coil, what happens to the flux and galvanometer?
What is observed when the magnet is held stationary near the coil?
What does the magnetic pole created on the near face of the coil oppose when a magnet moves?
Suppose an induced current aided the flux change as an N-pole approached a coil. Which pole would form on the near face?
What happens as the rate of change of magnetic flux becomes greater?
What is the induced current path for an irregular loop moving out of an out-of-page magnetic field?
