Solve
Guides
Standard XII
Physics
Motional EMF
Question

An electromagnetic field exists only when there is

A
an increasing current
B
decreasing current
C
voltage
D
current
Open in App
Solution
Verified by Toppr

An electromagnetic field exists only when there is current.
electric current flowing through a wire caused a nearby compass to deflect. ... In most conductors, the magnetic field exists only as long as the current is flowing (i.e. an electrical charge is in motion).

Was this answer helpful?
0
Similar Questions
Q1

An electromagnet acts as a standard magnet only when there is an electric current.


View Solution
Q2

How can we increase the magnetic field of an electromagnet?
Explain each method.

View Solution
Q3

If aggregate demand increases, aggregate supply will increase only when there is(are)


View Solution
Q4

An electric field E → and a magnetic field B → exist in a region. The fields are not perpendicular to each other.
(a) This is not possible.
(b) No electromagnetic wave is passing through the region.
(c) An electromagnetic wave may be passing through the region.
(d) An electromagnetic wave is certainly passing through the region.

View Solution
Q5

Explain the phenomenon of electromagnetic induction. Describe an experiment to show that a current is set up in a closed loop when an external magnetic field passing through the loop increases or decreases :

View Solution
Solve
Guides