Advertisements
Advertisements
प्रश्न
State the rule to determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
Advertisements
उत्तर
Fleming's Left-Hand Rule, also known as the Motor Rule, states that the thumb, first finger, and middle finger of the left hand should all be extended such that they are perpendicular to one another. The thumb indicates the direction of the conductor's motion (i.e., the direction of force acting on the conductor) if the first (fore) finger points in the direction of the magnetic field, the middle finger points in the direction of current, and so on.
APPEARS IN
संबंधित प्रश्न
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ______.
State whether the following statement is true or false
The field at the centre of a long circular coil carrying current will be parallel straight lines.
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
Describe how you will locate a current-carrying wire concealed in a wall.
Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.
The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:
(a) clockwise
(b) downwards
(c) anticlockwise
(d) upwards
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force in the wire?
Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if:
a current is passed through coil B by plugging the key?
Explain your answer mentioning the name of the phenomenon involved.
State condition when magnitude of force on a current carrying conductor placed in a magnetic field is maximum?
State Fleming’s left-hand rule.
A flat coil ABCD is freely suspended between the pole of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
When will coil come to rest?
Differentiate between conductors and insulators.
A current-carrying conductor is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:
A simple motor is made in a school laboratory. A coil of wire is mounted on an axle between the poles of a horseshoe magnet, as illustrated.
In the example above, coil ABCD is horizontal and the battery is connected as shown.
- For this position, state the direction of the force on the arm AB.
- Why does the current in the arm BC not contribute to the turning force on the coil?
What do you know about Michael Faraday?
If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.
|
The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
|
Name the law used to identify the radioactive radiation emitted by the element.
