- the continuation of the stream of charges is based upon?
- fermi speed?
- fermi velocity?
- concept of drift velocity can’t be explained without?
- value of fermi & drift velocity of electrons in metals?
- it does not depend on?
- why pure liquids are non conductors? what abt gases?
- how does metal become hot?
- for the continuation of the flow of electric charges in metals, what is mandatory?
- during the elastic collsion of electrons, what happens to thermal velocities?
no. of free electrons in an atom is high/low as compare to liquids?
what happens when the emf source is attached across the terminal sides of the conducting material?
the concept of drifting supports the charges?
what is the source that develops drifting for electrons?
what is emf in this terms?
how is P.D an effect of this?
compare drift velocity with mobility?
electric field intensity formula?
free electron density formula?
N=?
what is ne?
total charge on conducting material?
current I that passes through conductor? formula
drift velocity?
current density?
drift velocity & current have direct/indirect relation?
what is electric potential energy?
when does a charges particle possesses electric potential energy?
electrostatic force is conservative/non conservative in nature?
work done=?
formula?
so then what is bascially epe?
epe=? formula?
then what is electric potential? formula? unit?
electric potential? formula? unit?
another formula?
pg 198
what is electron volt?
1eV = ____ J?
Can you measure electric potential at a single point?
What is potential difference?
Why is electric potential important in electron microscopes?
What are charge carriers?
Q: How does electric potential help a cell phone work?
No. You need to measure the difference between two points (potential difference).
The diff. in electric potential b/w two points, also called voltage.
Particles like electrons that carry electricity.
A: It directs the movement of charge carriers, channeling their energy to make the phone operate.
Q: How does a mosquito zapper use electric potential?
Q: On what do electric potential & electric potential energy depend?
A: The potential difference across two points lets electricity flow through the mosquito, giving it a shock.
A: Both depend on two points—the start and end of the charge’s movement.
how do we accelerate charge carries to provide PD?
how is chemical energy in batteries changed to electrical energy?
what is f in emf?
how to find potential difference of a cell?
what is Req?
how do you calculate current in a simple circuit with a real battery?
emf source
what is resistance? SI unit?
name good conductors?
define 1 ohm?
pg 200 para 1
diff. b/w emf & terminal potential?
how can constant terminal potential be maintained?
pg 200
terminal potential=terminal voltage
FMIGTN
can terminal potential diff. behave as emf?
which is greater emf or terminal voltage?
An ideal battery (a perfect, imaginary one) has no internal resistance. In this perfect world, the terminal voltage would always equal the EMF, no matter how much current you draw. In the real world, this never happens.
When internal resistance exists within any electrical circuit including load resistance
can terminal potential be greater than emf?
how does internal resistance influences the efficiency of the battery?
what decreases internal resistance of the battery?
Yes, only one ideal situation does exit there when emf source is being charged.
emf will be greater than potential difference.
It also means less current can flow, making your device weaker (e.g., a dim flashlight).
what is internal resistance?
efficiency of emf source? %age?
power dissipation?
max. power output? what if R=r
the compact form of ionic, electronic and contact impedances
desribe potential diff and current according to ohm?
what is resistance of conducting material? numerical value based on?
how does ohm concept channeleiz the 3 basic electric terms
pg 201
how does variation of temp. effects the resistance of ANY conducting material?
resistance depends on? form eqn.
pg 201
SI units of resistivity? depends on?
conducting objects length doubles? cross section doubles
reciprocal of resistivity? unit? another unit?
what is resistivity basically?
higher resistivity _______ the electrons will be attracted to the atoms?
resistivity/resistane is an intrinsic/extrinsic property?
difference between resistivity and resistance?
thick/thin wire which resists more?
copper or rubber which has higher?
pg 203
LDRs? aka? basic mechanism?
basic principle?
diagram? made from? circuit symbol?
types?
explain the types?
when intensity of light increases, the resistance of conducting material __________.
what LDR is used for longer or shorter wavelengths?
intrinsic: shorter wavelengths
extrinsic: longer
