![Question Two [15 marks]](http://s1.studyres.com/store/data/003690533_1-3f6aadb25060fe335cebf6717500c22f-300x300.png)
Iron nail` Iron nail` Iron nau`
... rest with end P pointing North. Another bar X - Y of the same metal settles in no definite direction. What happens if the two bars are brought near one another? What materials would be suitable for the parts labelled P, Q ...
... rest with end P pointing North. Another bar X - Y of the same metal settles in no definite direction. What happens if the two bars are brought near one another? What materials would be suitable for the parts labelled P, Q ...
B - CLASSE Cornell
... A. It is zero around the circuit because it’s an electrostatic field B. It is non-zero around the circuit because it’s not an electrostatic field C. It is zero around the circuit because there is no electric field in the battery, only in the rest of the circuit D. It is non-zero around the circuit b ...
... A. It is zero around the circuit because it’s an electrostatic field B. It is non-zero around the circuit because it’s not an electrostatic field C. It is zero around the circuit because there is no electric field in the battery, only in the rest of the circuit D. It is non-zero around the circuit b ...
The Student Room
... Advanced Unit 4: Physics on the Move Monday 20 January 2014 – Afternoon Time: 1 hour 35 minutes You do not need any other materials. ...
... Advanced Unit 4: Physics on the Move Monday 20 January 2014 – Afternoon Time: 1 hour 35 minutes You do not need any other materials. ...
10. Interior of the Earth
... A. Waves form a wave front that moves outward from the center 1. Only those that release large amounts of energy can travel completely through the Earth 2. Only seismic waves generated by large earthquakes, volcanic eruptions, nuclear explosions, or large meteorite impacts can travel completely thro ...
... A. Waves form a wave front that moves outward from the center 1. Only those that release large amounts of energy can travel completely through the Earth 2. Only seismic waves generated by large earthquakes, volcanic eruptions, nuclear explosions, or large meteorite impacts can travel completely thro ...
vol 2 No 2.8 2005
... earthquake. This is due to dipole oscillations with the beginning of micro- fracturing process. Features of the emissions are: it has nonvanishing components for VLF region ( 30 KHz 3 KHz ), ELF region ( 3 KHz - 3 Hz) ,ULF region ( < 3 Hz ). Experimental evidence of EME before the fracture and at th ...
... earthquake. This is due to dipole oscillations with the beginning of micro- fracturing process. Features of the emissions are: it has nonvanishing components for VLF region ( 30 KHz 3 KHz ), ELF region ( 3 KHz - 3 Hz) ,ULF region ( < 3 Hz ). Experimental evidence of EME before the fracture and at th ...
force on a current in a magnetic field
... on a single turn loop of current to the force or torque on a many turn coil. In general, coils are wound with the area of each turn the same as all the others and of course the same current would flow through them all. Thus the force or torque on an n-turn coil is generally just n times the force or ...
... on a single turn loop of current to the force or torque on a many turn coil. In general, coils are wound with the area of each turn the same as all the others and of course the same current would flow through them all. Thus the force or torque on an n-turn coil is generally just n times the force or ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.