How can we measure the potential difference across the ends of a conductor ?
How can we measure the potential difference across the ends of a conductor ?
By using a device called voltmeter.
Similar Questions
The equivalent resistance in series combination is
The equivalent resistance in series combination is
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
A large number of free electrons are present in metals yet no current flows in the absence of electric potential across it. Explain the statement with reason.
A large number of free electrons are present in metals yet no current flows in the absence of electric potential across it. Explain the statement with reason.
Two resistors of resistance $2 \,\Omega $ and $4\, \Omega $ when connected to a battery will have
Two resistors of resistance $2 \,\Omega $ and $4\, \Omega $ when connected to a battery will have
$(a)$ What is meant by saying that the potential difference between two points is $1$ volt ?
$(b)$ Why does the connecting cord of an electrical heater not glow while the heating element does ?
$(c)$ Electrical resistivities of some substance at $20^{\circ} C$ are given below
Silver
$1.60 \times 10^{-8}\, \Omega m$
Copper
$1.62 \times 10^{8} \,\Omega$
Tungsten
$5.2 \times 10^{-8} \,\Omega m$
Iron
$10.0 \times 10^{8} \,\Omega m$
Mercury
$94.0 \times 10^{-8}\, \Omega m$
Nichrome
$100 \times 10^{-6}\, \Omega m$
Answer the following questions in relation to them
$(i)$ Among silver and copper which one is better conductor ? Why ?
$(ii)$ Which material would you advise to use in electrical heating device ? Why ?
$(a)$ What is meant by saying that the potential difference between two points is $1$ volt ?
$(b)$ Why does the connecting cord of an electrical heater not glow while the heating element does ?
$(c)$ Electrical resistivities of some substance at $20^{\circ} C$ are given below
| Silver | $1.60 \times 10^{-8}\, \Omega m$ |
| Copper | $1.62 \times 10^{8} \,\Omega$ |
| Tungsten | $5.2 \times 10^{-8} \,\Omega m$ |
| Iron | $10.0 \times 10^{8} \,\Omega m$ |
| Mercury | $94.0 \times 10^{-8}\, \Omega m$ |
| Nichrome | $100 \times 10^{-6}\, \Omega m$ |
Answer the following questions in relation to them
$(i)$ Among silver and copper which one is better conductor ? Why ?
$(ii)$ Which material would you advise to use in electrical heating device ? Why ?