Magnetic Field due to Solenoid

Q.

Statement 1: The magnetic field strength of a bar magnet is the maximum at its poles.

Statement 2: There is no magnetic field inside a current-carrying solenoid.

1. Statement 1 is true.

2. Statement 2 is true.

3. Both the statements are true.

4. Both the statements are false.

Q.

The magnetic field lines inside a long, current carrying solenoid are nearly _____ in shape.

1. linear

2. circular

3. elliptical

4. parabolic

Q. A current of 2 A exists in a square loop of edge 10 cm. Find the magnetic field B at the centre of the square loop

Q.

The magnetic field inside the solenoid is :

1. Zero

2. Non-uniform

3. Almost same at all points

4. Can't be said

Q. Strength of magnetic field ______ with increase in distance from current-carrying straight wire.

1. Increases
2. Remain same
3. Fluctuate
4. Decreases

Q. 6.The radius of each of two circular coils of single turn is r. The two coils are placed parallel to each other with a common axis. The distance between the centres of the coils is r/2. If equal current is sent through the two coils in the same direction, what will be the magnetic field at the centre of each coil. What will be the magnetic field at the midpoint on the line joining the two centres.

Q. What can be obtained from Right Hand Thumb rule?

1. Magnetic field direction if current is given.
2. It is helpful in determining the intensity of the current.
3. Magnetic field direction at any point.
4. It is helpful in determining the intensity of the magnetic field.

Q. Magnetic field at O

Q.

A solenoid that is carrying current has magnetic field lines similar to that of ____.

1. a bar magnet

2. any current carring conductor

3. a spherical magnet

4. a horse-shoe magnet

Q.

If at the centre of the given solenoid, an iron ring is placed coaxially.Then identify in which direction will the magnetised iron ring's north-pole will be?

1. There won't be any north as the magnetic field lines will be circular in clockwise direction inside the magnet.

2. 1

3. 2

4. There won't be any north as the magnetic field lines will be circular in anti-clockwise direction and inside the magnet.

Q. Magnetic field lines emerge from the _________ pole of a solenoid or a permanent magnet.

1. north
2. south
3. none of these
4. north-east

Q. When a soft iron bar is introduced inside a current carrying solenoid, the magnetic field _____.

1. remains unaffected
2. decreases
3. becomes zero
4. increases

Q.

The magnetic field lines inside a current carrying solenoid are _____________.

1. inclined at angle with respect to the solenoid
2. None of the above

3. perpendicular to each other

4. parallel to each other

Q. 4.A long straight hollow metallic tube carrying a current I has three sections of different area of cross section as shown in the figure. 3 points A B and C are on the line parallel to the axis of the tube if magnetic field at these points are B1 B2 and B3 respectively then what is the relation between B1 , B2 and B3

Q. 15.find the magnetic field at the centre of the loop O shown in the figure

Q.

A soft iron bar is placed inside a current-carrying solenoid. The magnetic field inside the solenoid will _____.

1. decrease
2. increase
3. become zero
4. remain the same

Q. The strength of the magnetic field in a solenoid can be increased by increasing ________.

1. the number of coil turns per unit length
2. the electric current passing through the coil
3. the mass of the coil material
4. the density of the coil material

Q.

Statement 1: The magnetic field strength of a bar magnet is the maximum at its poles.

Statement 2: There is no magnetic field inside a current-carrying solenoid.

1. Statement 1 is true.

2. Statement 2 is true.

3. Both the statements are true.

4. Both the statements are false.

Q.

A long current carrying solenoid produces an uniform magentic field inside it.

1. True
2. False