The electromagnet in a galvanometer
A. increases the voltage in a circuit.
B. moves a pointer along a numbered scale in response to a current.
C. induces an electric current.
D. increases the current in a circuit.

Question

The electromagnet in a galvanometer
	A. increases the voltage in a circuit. 	
	B. moves a pointer along a numbered scale in response to a current. 	
	C. induces an electric current. 	
	D. increases the current in a circuit.

ghazi · Answer

basically, electromagnetic coil reduces damping and the field in the electromagnetic coil interacts with the field of current passing through the galvanometer and hence it helps in moving a pointer ...(B)

shane_b · Answer

A galvanometer consists of two permanent magnets which surround an electromagnet (coil).  The coil itself is attached to a pointer and when current passes through the coil, a magnetic field is produced which interacts with the field of the permanent magnets.  This in turn causes the coil and pointer to deflect proportionally to the current.

shane_b · Answer

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/galvan.html