Fleming's Right Hand Rule

Q.

Please explain me the right hand thumb rule.

Q.

What is permeability of free space ?

Q. Draw a labeled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?

Q.

State and explain Fleming's right hand rule.

Q.

Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right hand rule to find out the direction of the magnetic field inside and outside the loop.

Q.

What is Polarity?

Q. How can we find the direction of magnetic field in a circular loop?

Q.

A charged particle enters at right angles into a uniform magnetic field as shown :

What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interation with the magnetic field ?

Q.

What is Maxwells screw rule? What is it used for?

Q.

What is Maxwell's corkscrew rule ? For what purpose is its used ?

Q.

A copper wire of resistivity 1.6 ×10^-8ohm metre has a cross sectional area of 20×10^-4cm². Calculate the length of the wire required to make a 10 ohm coil.

Q.

What does the direction of thumb indicate in the right-hand thumb rule? In what way this rule is different from Fleming’s left-hand rule?

Q.

Name the rule which gives the direction of induced current.

Q.

The direction of induced current is obtained by:
(a) Fleming's left hand rule
(b) Clock rule
(c) Right hand thumb rule
(d) Fleming's right hand rule.

Q. Right hand thumb rule was given by:

1. H.C.Oersted
2. Flemings
3. Einstein
4. Maxwell

Q.

What is magnetic flux ?What is the S.I. unit of magnetic flux ?

Q.

What does a time-varying magnetic field yield?

Q. Question 3
A circular loop placed in a plane perpendicular to the plane or paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anticlockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole or the resultant magnet is on the race close to

(a) A
(b) B
(c) A if the current is small, and B if the current is large
(d) B if the current is small and A if the current is large

Q.

When is the force experienced by a current-carrying conductor placed in a magnetic field largest?

Q.

The middle finger in Fleming’s right hand rule represents the direction of which quantity?

1. Motion of conductor

2. Induced current

3. Magnetic field

4. Flow of charges

Q. A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is λ (C/m), the electric field vector at y = – a on y-axis is

Q.

Flemings left and right-hand rules are used in

1. $DC$ motor and $AC$ generator

2. $DC$ generator and $AC$ motor

3. $DC$ motor and $DC$ generator

4. Both rules are the same, anyone can be used

Q.

A current carrying conductor is placed from West to East direction. What will be the direction of the force due to the earth's magnetic field?

1. Downwards

2. Upwards

3. Zero force

4. Cannot be determined

Q.

A straight wire carrying electric current is moving out of plane of paper and is perpendicular to it and the current is also upwards. What is the direction and type of induced magnetic field lines? [1 MARK]

Q.

A beam of alpha particles enters a chamber moving along the magnetic field. The force acting on them is

1. Maximum and along the magnetic field

2. Zero

3. Minimum and perpendicular to the magnetic field

4. Maximum and perpendicular to the magnetic field

Q.

A transformer core is laminated to

1. reduce hysteresis loss

2. reduce eddy current losses

3. reduce copper losses

4. reduce all above losses

Q.

What affects the inductance of a coil?

Q.

In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontal
plane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:

1. Upward

2. North

3. East

4. West

Q.

When a sheet of metal is kept in a magnetic field, which changes from zero to a maximum value, the induced currents are setup as shown in the figure. What is the direction of magnetic field?

1. Into the plane of the paper

2. Out of the plane of the paper

3. West to east

4. South to north

Q.

Q1.how does a moving electron creates magnetic as well as electric field and in what way these two fields are different from each other?