P2 Extende Rsponse Flashcards
A potential divider circuit and a normal circuit are used to measure the voltage and current across a filament lamp there is an EMF supply of 12 V to both circuits explain which circuit would be able to produce a graph where minimum current is 0.2 A and there is a range of values from 0 to 12 V , the maximum resistance in circuit one is 17.2 owns
The minimum current is 0.7 A which is not close to 0.2 A therefore circuit one cannot produce the range of values for current between 0 V and 12 V
However circuit two is a potential divider circuit therefore it is able to produce the data as the potential difference can be varied between 0 V and 12 V
Explain in terms of electromagnetic induction how a transformer may be used to step down voltage
When an alternating current flows through the primary coil and alternating magnetic field is introduced therefore there is a change in magnetic flux linkage of the secondary coil since EMF is proportional to the rate of change of magnetic flux linkage. An EMF is induced across the secondary coil if the number of turned on the secondary coil is less than the number of terms on the primary coil the EMF is less than the primary potential difference.
A charged positive ion travels perpendicular to a uniform magnetic field describe the path of this ion and a calculation that can be used to describe it
The iron will have a circular Paeth we can use Fleming‘s left-hand rule to find in which direction the force is acting and then we can use
Bqv = mv^2/ r
Define radius of the path to show its motion
