Question

A straight 1.2 m length iron rod is moved at 10 m/s through the earth's magnetic field at a location where it has magnitude 1.0 × 10^-5 T. What is the magnitude of the induced emf between one end of the wire and the other end?
(Points : 1)
1.2 V

1.2 × 10^-4 V

1.0 × 10^-4 V

120 V

Answer 1

1.2V

Answer 2

Thank could you help me with like 2 more ? @mlgpro

Answer 3

i guess...

Answer 4

In which case is there an induced electromotive force?
(Points : 1)
An electromagnet operating on direct current is held inside a second coil of wire.

An electromagnet operating on alternating current is held inside a second coil of wire.

A permanent bar magnet is held inside a coil of wire.

Field lines from earth's magnetic field cross the area of a coil of wire.

Answer 5

it isn't the 3rd or 4th one

Answer 6

its the 2nd one

Answer 7

Awesome thanks heres the next one.
A wire loop has an area of 0.12 m^2, and the magnetic field through it increases from 0 to 0.20 T in 0.30 s. What is the induced emf in the loop?


(Points : 1)
0.80 V

0.080 V

0.024 V

0.0072 V

Answer 8

0.024 V and i gotta go fan me and ill fan you

Answer 9

Thank you I will

Answer 10

see ya

Answer 11

@Daniellelovee

Answer 12

@Elena says this:

Magnetic field of
the Earth is ≈ 10^-5 T (!!!)
ε = B•l•v =1•10^- 5•1.2•10 =1.2•10^-4

http://www.jiskha.com/display.cgi?id=1338149441