Magnetism - Physics: 1(AE) 2(B,D)
... This is how Niagara Falls was used to produce electricity… Water flow is used to turn a turbine through a magnetic field inducing a potential difference and producing electrical current. ...
... This is how Niagara Falls was used to produce electricity… Water flow is used to turn a turbine through a magnetic field inducing a potential difference and producing electrical current. ...
Questions:
... #1.) Which of the following statements are true? i. Electric field lines are always perpendicular to potential field equipotential lines. ii. The more closely spaced the equipotential lines are, the greater the potential. iii. The more closely spaced the electric field lines are, the stronger the el ...
... #1.) Which of the following statements are true? i. Electric field lines are always perpendicular to potential field equipotential lines. ii. The more closely spaced the equipotential lines are, the greater the potential. iii. The more closely spaced the electric field lines are, the stronger the el ...
Section 1: Magnets and Magnetic Fields Section 2: Magnetism from
... The strength of the magnetic field in a solenoid depends on the number of coils or the amount of current in the wire. By increasing the number of coils or the amount of current you can increase the strength of the magnet. Another way to increase the magnetic field of a solenoid is to place a magnet ...
... The strength of the magnetic field in a solenoid depends on the number of coils or the amount of current in the wire. By increasing the number of coils or the amount of current you can increase the strength of the magnet. Another way to increase the magnetic field of a solenoid is to place a magnet ...
Efficiency of an Electric Motor
... The electrical energy in a wire is stored in the electric field between the free electrons in the wire. An electric motor converts this energy to mechanical work, by using it to spin a shaft that can be attached to a large number of mechanical devices (such as the drive axle of a car). The electric ...
... The electrical energy in a wire is stored in the electric field between the free electrons in the wire. An electric motor converts this energy to mechanical work, by using it to spin a shaft that can be attached to a large number of mechanical devices (such as the drive axle of a car). The electric ...
I. Introduction
... speed of 6,28 [s-1] (stator frequency is then fs=1 [Hz]). If desired condition is constant value of rotor speed (=6,28 [s-1]) at applied step load, vector control systems must increase stator frequency fs. Fig. 5 shows static characteristic of electromagnetic torque in mode r 1,2 rn at frequenc ...
... speed of 6,28 [s-1] (stator frequency is then fs=1 [Hz]). If desired condition is constant value of rotor speed (=6,28 [s-1]) at applied step load, vector control systems must increase stator frequency fs. Fig. 5 shows static characteristic of electromagnetic torque in mode r 1,2 rn at frequenc ...
Alternating current
... in the United States both found that moving a loop of wire through a magnetic field caused an electric current to flow in the wire. • They also found that moving a magnet through a loop of wire produces a current. • The magnet and wire loop must be moving relative to each other for an electric curre ...
... in the United States both found that moving a loop of wire through a magnetic field caused an electric current to flow in the wire. • They also found that moving a magnet through a loop of wire produces a current. • The magnet and wire loop must be moving relative to each other for an electric curre ...
83 revision questions for IGCSE questions solutions
... Carbon 14 dating can be used to estimate the AGE of a piece of a wooden building found on an archaeological site. Living material contains a known ratio of carbon 14 to other isotopes of CARBON. Carbon 14 is unstable and so the amount contained by the SAMPLE falls away once the tree it was part of d ...
... Carbon 14 dating can be used to estimate the AGE of a piece of a wooden building found on an archaeological site. Living material contains a known ratio of carbon 14 to other isotopes of CARBON. Carbon 14 is unstable and so the amount contained by the SAMPLE falls away once the tree it was part of d ...
How do they work?
... There is an effect of electromagnetism known as mutual induction. Two or more coils of wire placed so that the changing magnetic field created by one induces a voltage in the other. If we have two inductive coils and we energise one coil with AC, we will create an AC voltage in the other coil. When ...
... There is an effect of electromagnetism known as mutual induction. Two or more coils of wire placed so that the changing magnetic field created by one induces a voltage in the other. If we have two inductive coils and we energise one coil with AC, we will create an AC voltage in the other coil. When ...
Motors and Generators
... Using the right hand palm rule, the direction of the force on sides ab and cd can be deduced The net result of these two forces is to produce a torque on the loop about the axis; in the diagram above, the torque is acting in an anticlockwise direction Forces on the sides bc and ad: The sides o ...
... Using the right hand palm rule, the direction of the force on sides ab and cd can be deduced The net result of these two forces is to produce a torque on the loop about the axis; in the diagram above, the torque is acting in an anticlockwise direction Forces on the sides bc and ad: The sides o ...
Lecture 13
... Domestic electricity is that electricity which is supplied to homes under specific conditions of current and voltage. Voltage, measured in volts (V), causes electric current, measured in amperes (A), to flow in a conducting material such as copper wire. For practical and commercial reasons a “harmon ...
... Domestic electricity is that electricity which is supplied to homes under specific conditions of current and voltage. Voltage, measured in volts (V), causes electric current, measured in amperes (A), to flow in a conducting material such as copper wire. For practical and commercial reasons a “harmon ...
Chapter 25 Electromagnetic Induction 25.1 Questions About
... 15) The primary of a transformer is the coil connected to A) the load. B) the Internet. C) the power line. D) none of these 16) Transformers use ac so there will be the required A) transfer of energy from coil to coil. B) voltage for transformation. C) change in magnetic field for operation. D) chan ...
... 15) The primary of a transformer is the coil connected to A) the load. B) the Internet. C) the power line. D) none of these 16) Transformers use ac so there will be the required A) transfer of energy from coil to coil. B) voltage for transformation. C) change in magnetic field for operation. D) chan ...
