How is a galvanometer converted to an ammeter?

As we know that, a galvanometer is a device that is used to detect small electric current flowing in the circuit and an ammeter is an instrument used to measure the current in a circuit. And ammeter is connected in series with the circuit. It is a low resistance instrument. A Galvanometer is converted into an ammeter by connecting a low resistance S of suitable value in parallel with the galvanometer coil. Here, S = G I g I - I g where, G = Resistance of the Galvanometer

EASY

12th Odisha Board

IMPORTANT

Earn 100

A long straight conductor of negligible radius carries a current of $1 A$ and is directed along $Z$ -axis. The magnetic field $\vec{B}$ produced by it at a distance of $1 m$ on the $+ Y$ axis is ?

50% studentsanswered this correctly

Important Questions on Magnetic Effect of Electric Current

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 7

A long straight solid metal wire of radius

4 mm

carries a current uniformly distributed over its circular cross section. If the magnetic induction at any point on its surface is

B

, then the same at any point at a distance

2 mm

from its centre will be

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 8

A solenoid of radius

r = 5 cm

has a length of

2

metres. If the number of turns on the solenoid is

1000

and it carries a current of 1 ampere, the magnetic field at its midpoint is nearly

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 9

A charged particle having velocity

\vec{v}

is projected into a magnetic field

\vec{B}

at an angle

θ

with it. The path described by the particle in the field will be

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 10

A charged particle of charge

q

and mass

m

moves with a velocity

\vec{v}

in a magnetic field

\vec{B}

in a circular path of radius

r

. If the same particle is projected with a velocity

2 \vec{v}

into a magnetic field

2 \vec{B}

in such a way that it moves in a circular path of radius

r'

, then

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 11

A current carrying coil of area

A

is freely suspended in a magnetic field of induction

B

. The torque experienced by the coil is maximum when the plane of the coil makes an angle

θ

with the direction of

\vec{B}

where

θ

is equal to

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 12

A coil of

100

turns carries a current of

1 A

and is freely suspended in a magnetic field of induction

0.5

tesla. If the face area of the coil is

0.2 m^{2}

, the magnetic moment associated with the coil has value

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 13

A moving electron enters normally into a uniform magnetic field; its

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 8 - Magnetic Effect of Electric Current>MODEL QUESTIONS>Q 14

The deflection of a galvanometer falls from

50

divisions to

20

divisions when a

12 ohm

shunt is applied. Assuming the circuit resistance

R

to be much greater than

G

, the value of

G

A long straight conductor of negligible radius carries a current of 1 A and is directed along Z-axis. The magnetic field B→ produced by it at a distance of 1 m on the +Y axis is ?

Important Questions on Magnetic Effect of Electric Current

Learn and Prepare for any exam you want !

A long straight conductor of negligible radius carries a current of $1 A$ and is directed along $Z$ -axis. The magnetic field $\vec{B}$ produced by it at a distance of $1 m$ on the $+ Y$ axis is ?