Moving Charges

Question 1

Some points on Ammeter?

Answer 1

It is connected in series
It is a device used to measure current
It is prep by adding small resistance called shunt in parallel to galvanometer

Question 2

Some points on Voltmeter

Answer 2

Device used to measure voltage
Connected in parallel
Prep by high resistance in series

Question 3

What is the principle of moving coil galvanometer?

Answer 3

When a current carrying conductor is placed in uniform mag field, it experienced torque.

Current is directly proportional to deflecting angle

Question 4

Smallest value of current

Answer 4

10^-9A

Question 5

Importance of Oersted experiment?

Answer 5

Whenever a current is passing through a conductor, a magnetic field is produced around conductor carrying current.

Relation btw electric current and magnetic is identified. It showed that origin of mag field is due to morion of electric charges.

Question 6

What is force of conductor of length L carrying current I is placed in magnetic field of induction B? When does it become max?

Answer 6

F=Bilsin theta
Fmax= Bil