Advertisements
Advertisements
प्रश्न
The relationship between the potential difference and the current in a conductor is stated in the form of a law.
- Name the law.
- What does the slope of V-I graph for a conductor represent?
- Name the material used for making the connecting wire.
Advertisements
उत्तर
(i) Ohm’s law.
(ii) For a graph of potential difference against current, the slope represents resistance:
\[\text{slope}=\frac{\Delta V}{\Delta I}=R\]
(iii) Copper is commonly used for connecting wires because it is a good conductor.
संबंधित प्रश्न
A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply. Find the heat in joules produced by this combination of resistances in half a minute.
Show by a diagram how two resistors R1 and R2 are joined in parallel. Obtain an expression for the total resistance of the combination.
How does an increase in the temperature affect the specific resistance of a semiconductor?
Define the following:
Coulomb
SI unit of resistance is:
A heater of 220 V heats a volume of water m 5 mint time. A heater of 110 V heat in ten second. The resistance of the conductor is
Two cells of same emf E but internal resistance r1 and r2 are connected in series to an external resistor R (Figure). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero.
In which unit is the resistance of a conductor measured?
The electric current between two joined conductors at different potentials continues to flow until:
If a current of 1 A flows through a conductor, then according to Ohm's Law, the resistance of the conductor is:
