electric circuits

Question 1

what is the definition of electical current

Answer 1

electric current is the rate of flow of charge

Question 2

what is the equation that links charge current and time

Answer 2

Q= l x t

Question 3

what is the unit for charge flow

Answer 3

coloumbs, C

Question 4

what is the unit for current

Answer 4

amps, A

Question 5

what is the unit for time

Answer 5

seconds, S

Question 6

what is the equation that links potential difference, current and resistance

Answer 6

V= I x R

Question 7

What is the unit for potential difference

Answer 7

volts, V

Question 8

what is the unit for resistance

Answer 8

ohms ♎️

Question 9

what is the difference between a series and a paralel circuit

Answer 9

a series has only one path for the current to flow, a parallel has more than one

Question 10

what does ohms law say

Answer 10

the current through an ohmic conductor is directly proportional to the potential difference across the resistor

Question 11

what happens to the resistance of filament lamp as the temperature increases

Answer 11

as the temperature increases the resistance of a filament lanp also increases

Question 12

what happens to the resistance of a thermistor as it increases in temperature

Answer 12

the resistance decreases as the temperature increases

Question 13

what happens to the resistance of a LDR as the light intesity increases

Answer 13

the resistance decreases as the light intesity increases

Question 14

in what diode can the current flow through a diode

Answer 14

current can inly flow one way through a diode

Question 15

name an application of an LDR

Answer 15

in sensing circuits such as lights turning off when dark

Question 16

name an application thermistor

Answer 16

thermostat

Question 17

how does resistance ass in series

Answer 17

Rtot=R1+R2

Question 18

what halpens to current in series/ parallel circuits

Answer 18

current is the same everywhere in a series circuit, current splits in a a parallel circuit

Question 19

what happens to poterdifference in series/ parallel circuits

Answer 19

potential difference is the same on different paths of a parallel circuit, it splits across two components in a series circuit

Question 20

what happens to the total resistance of two resistors in parallel

Answer 20

the total resistance of two resistors in parallel is less than the resistance of the smallest resistor

Question 21

what do we use to measure potential difference/ current

Answer 21

we use a voltmeter in parallel across a component and ammeter in series