1. Ohm`s Law states that the voltage across a conducting material is
... 1. Ohm’s Law states that the voltage across a conducting material is directly proportional to the current flowing through it, that the constant of proportionality is called as ( ...
... 1. Ohm’s Law states that the voltage across a conducting material is directly proportional to the current flowing through it, that the constant of proportionality is called as ( ...
Scheme of work for Year 7: Introduction
... strong field. Emphasise that the current size and direction depends on the speed and direction of the wire’s motion. Repeat the demo, but this time move the magnet and keep the wire still, to show that relative motion is important. Demonstrate a model generator, emphasising the energy transfer takin ...
... strong field. Emphasise that the current size and direction depends on the speed and direction of the wire’s motion. Repeat the demo, but this time move the magnet and keep the wire still, to show that relative motion is important. Demonstrate a model generator, emphasising the energy transfer takin ...
Batteries and Compasses - Karen C`s Learning Portfolio
... did our three experiments. In the battery and compass lab, the article says that when we clipped the ends of the wire to the battery holder, an electric current was produced which made a magnetic field. When we moved the battery over the compass, the needle started to move because the compass is a m ...
... did our three experiments. In the battery and compass lab, the article says that when we clipped the ends of the wire to the battery holder, an electric current was produced which made a magnetic field. When we moved the battery over the compass, the needle started to move because the compass is a m ...
second midterm
... 4. In 1965, Penzias and Wilson discovered the cosmic microwave background (CMB) radiation left over from the Big Bang expansion of the Universe, which subsequently earned them the Nobel Prize in physics in 1978. This radiation background behaves like a blackbody with a temperature of 2.725 K, as se ...
... 4. In 1965, Penzias and Wilson discovered the cosmic microwave background (CMB) radiation left over from the Big Bang expansion of the Universe, which subsequently earned them the Nobel Prize in physics in 1978. This radiation background behaves like a blackbody with a temperature of 2.725 K, as se ...
Ampere`s Law
... loop is not Io; the total current is less than Io. • The current is uniformly distributed throughout the cross-section of the wire; the enclosed current is proportional to the area of the Amperian loop. ...
... loop is not Io; the total current is less than Io. • The current is uniformly distributed throughout the cross-section of the wire; the enclosed current is proportional to the area of the Amperian loop. ...
Clicker questions_farady_induction
... Answer: The B-field from a bar magnet points out of the North pole. As seen from above, the field through the loop is out (toward the observer). As the magnet is pulled away, the flux is decreasing. To fight the decrease, the induced Bfield should add to the original B-field, and also be out (towar ...
... Answer: The B-field from a bar magnet points out of the North pole. As seen from above, the field through the loop is out (toward the observer). As the magnet is pulled away, the flux is decreasing. To fight the decrease, the induced Bfield should add to the original B-field, and also be out (towar ...
Physics Sample Test Papers Multiple Choice
... 8. A bulb is connected to a battery of emf 10 V so that the resulting current is 10 mA. When the bulb is connected to 220 V mains, the current is 50 mA. Choose the correct alternative (s) In the first case, the resistance of the bulb is 1kΩ and in second case, it is 4.4 kΩ. It is not possible since ...
... 8. A bulb is connected to a battery of emf 10 V so that the resulting current is 10 mA. When the bulb is connected to 220 V mains, the current is 50 mA. Choose the correct alternative (s) In the first case, the resistance of the bulb is 1kΩ and in second case, it is 4.4 kΩ. It is not possible since ...
magnetism powerpoint
... Electromagnet: a coil of current-carrying wire with an iron core. The more turns, the stronger the magnet. Used in junkyards to ...
... Electromagnet: a coil of current-carrying wire with an iron core. The more turns, the stronger the magnet. Used in junkyards to ...
Lecture 7
... All magnets have north and south poles. When two magnets are brought together, like poles repel and unlike poles attract. ...
... All magnets have north and south poles. When two magnets are brought together, like poles repel and unlike poles attract. ...
What is Magnetism?
... I own a jewelry store and recently I have made a lot of money using magnets to make earrings, necklaces, and even bracelets. Unfortunately, I only have one big magnet left, but I need to make 3 different pieces of magnetic jewelry. Since I only make money if my jewelry is magnetic, I was wondering i ...
... I own a jewelry store and recently I have made a lot of money using magnets to make earrings, necklaces, and even bracelets. Unfortunately, I only have one big magnet left, but I need to make 3 different pieces of magnetic jewelry. Since I only make money if my jewelry is magnetic, I was wondering i ...
Electricity-and-Magnetism
... 2. Current: the amount of charge that passes a given point in a specified period of time, measured in amperes(amps, A); flow of electrons through a circuit. 3. Closed Circuit- direction of current flow from positive to negative terminal when powered by a battery 4. Schematic- special type of diagram ...
... 2. Current: the amount of charge that passes a given point in a specified period of time, measured in amperes(amps, A); flow of electrons through a circuit. 3. Closed Circuit- direction of current flow from positive to negative terminal when powered by a battery 4. Schematic- special type of diagram ...
List of important topics: Electricity • Charge • Coulomb Force
... For a magnetic material you can align the atoms. These atoms need to have some overall rotating charge that can be considered as a loop. The combined movement of all the electrons in an atom ...
... For a magnetic material you can align the atoms. These atoms need to have some overall rotating charge that can be considered as a loop. The combined movement of all the electrons in an atom ...
Galvanometer
A galvanometer is a type of sensitive ammeter: an instrument for detecting electric current. It is an analog electromechanical actuator that produces a rotary deflection of some type of pointer in response to electric current through its coil in a magnetic field.Galvanometers were the first instruments used to detect and measure electric currents. Sensitive galvanometers were used to detect signals from long submarine cables, and to discover the electrical activity of the heart and brain. Some galvanometers use a solid pointer on a scale to show measurements; other very sensitive types use a miniature mirror and a beam of light to provide mechanical amplification of low-level signals. Initially a laboratory instrument relying on the Earth's own magnetic field to provide restoring force for the pointer, galvanometers were developed into compact, rugged, sensitive portable instruments essential to the development of electrotechnology. A type of galvanometer that records measurements permanently is the chart recorder. The term has expanded to include use of the same mechanism in recording, positioning, and servomechanism equipment.