Motional EMF in an Open Conductor
Trending Questions
Q. 18.A horizontal wire 0.8 m long is falling at a speed of 5 m/s perpendicular to a uniform magnetic field of 1.1 T, which is directed from east to west. Calculate the magnitude of the induced emf. Is the north or south end of the wire positive and why?
Q. Two coils are at fixed locations. When coil-1 has no current and current in the coil-2 increases at the rate 15.0 As−1. The e.m.f. in the coil-1 is 25.0 mV. When coil-2 has no current and coil-1 has a current of 3.6 A., the flux linkage in coil-2 is-
Q.
An aeroplane in which the distance between the tips of wings is 50 m is flying horizontally with a speed of 360 km/hr over a place where the vertical component of earth's magnetic field is 2.0 x 10−4weber/m2 . The potential difference between the tips of the wings would be
0.1 V
1.0 V
0.2 V
0.01 V
Q. A conductor of resistance 3Ω is moving with speed v = 6 m/s. B is uniform & is equal to 4 Tesla. Length of the conductor is 50 cm. If R=5Ω, find the power dissipated in 5Ω.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/445440/original_8.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/445440/original_8.png)
- 6 Watt
- 15 Watt
- 9 Watt
- 11 Watt
Q. A conducting rod is moving in uniform field of 4×102 Tesla; speed of the rod is 6 m/s. Find the emf induced in the rod.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/445445/original_10.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/445445/original_10.png)
- 72 volt
- 96 volt
- 312 volt
- 288 volt
Q.
A thin semicircular conducting ring of radius R is falling with its plane vertical, in a horizontal magnetic induction B. At the position MNQ, the speed of the ring is V and the potential difference developed across the ring is
Zero
2RBV and Q is at higher potential