electricity 17

Question 1

what si unit is charge

Answer 1

C

Question 1

What is current and its si unit

Answer 1

rate flow of charges, A

Question 2

what is electron charge

Answer 2

1.6x10-19

Question 3

Formulas of Current?

Answer 3

I=q/t

Question 4

what is conventional current

Answer 4

flow of charges from positive to negative terminal

Question 5

electron flow

Answer 5

flow of charges from negative to positive terminal

Question 6

what is emf

Answer 6

work done to drive a unit charge through a complete circuit

Question 7

what is pd

Answer 7

work done to drive a unit charge through the component

Question 8

formula? and si

Answer 8

v=w/q Voltage

Question 9

ammeter connected in what

Answer 9

series

Question 10

Voltmeter connected in what

Answer 10

parallel

Question 11

Why electric resistance increase with temp?

Answer 11

electron flow through and collide with the ions of component and other electrons which the collision resist the flow of charges

Question 12

formula?

Answer 12

r=v/i

Question 13

res of a wire?

Answer 13

r= p x l /A

Question 14

ohm law?

Answer 14

current passing through metal conductor is proportional to pd across all ends

Question 15

safety precaution

Answer 15

set res to max

Question 16

example of non ohmic conductors

Answer 16

filament semiconductor thermistor

Question 17

filament

Answer 17

as current increase more chemical pot energy transfered from battery to internal store of filament, increase res, decrease current

Question 18

semiconductor

Answer 18

voltage connected to anode of diodide which large current flow and res is low, at cathode of dioide, res is high while current slow