Calculate the number of electrons constituting one coulomb of charge.
(Charge on one electron $=1.6 \times 10^{-19} C$ )
Calculate the number of electrons constituting one coulomb of charge.
(Charge on one electron $=1.6 \times 10^{-19} C$ )
Number of electrons
$=\frac{1 C }{1.6 \times 10^{-19} C }$
$=0.625 \times 10^{19}$
$=6.25 \times 10^{18}$
Similar Questions
A wire of length $L$ and resistance $R$ is stretched so that the length is doubled and area of cross-section is halved. How will its
$(a)$ resistance change ?
$(b)$ resistivity change ?
A wire of length $L$ and resistance $R$ is stretched so that the length is doubled and area of cross-section is halved. How will its
$(a)$ resistance change ?
$(b)$ resistivity change ?
The table given below gives the resistivity of three samples in ohm metre
Samples
$A$
$B$
$C$
Resistivity
$1.6 \times 10^{-8}$
$7.5 \times 10^{17}$
$44 \times 10^{-6}$
$(a)$ Which of them is a good conductor ? Which is an insulator ? Why?
$(b)$ $A$ wire of resistance $4$ ohm is doubled on it. Calculate the new resistane of the wire.
The table given below gives the resistivity of three samples in ohm metre
| Samples | $A$ | $B$ | $C$ |
| Resistivity | $1.6 \times 10^{-8}$ | $7.5 \times 10^{17}$ | $44 \times 10^{-6}$ |
$(a)$ Which of them is a good conductor ? Which is an insulator ? Why?
$(b)$ $A$ wire of resistance $4$ ohm is doubled on it. Calculate the new resistane of the wire.
In a circuit containing two unequal resistors connected in parallel
In a circuit containing two unequal resistors connected in parallel
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
Two bulbs $A$ and $B$ are rated as $90\, W -120 \,V$ and $60\, W -120\, V$ respectively. They are connected in parallel across a $120\, V$ source. Find the current in each bulb. Which bulb will consume more energy ?
Two bulbs $A$ and $B$ are rated as $90\, W -120 \,V$ and $60\, W -120\, V$ respectively. They are connected in parallel across a $120\, V$ source. Find the current in each bulb. Which bulb will consume more energy ?