electricity

Question 1

how are ammeters placed in a circuit and what is an important property of it?

Answer 1

in series and has 0 resistance

Question 2

how are voltmeters placed in a circuit and what is an important property of it?

Answer 2

in parallel and have infinity resistance

Question 3

what is Ohm’s law?

Answer 3

so long as physical conditions remain constant, such as temperature, the current through an Ohmic conductor is directly proportional to the potential difference across it

Question 4

what is an NTC thermistor?

Answer 4

a negative temperature coefficient- resistance decreases as the temperature goes up

Question 5

what is a superconductor?

Answer 5

a material that is cooled below the critical temperature (transitional temperature) their resistivity disappears entirely

Question 6

what is a potential divider?

Answer 6

a circuit with a voltage source and a couple of resistors in series
the P.D. is split across the resistors in ratio of their resistance

Question 7

what is potential difference?

Answer 7

work done per unit charge