Advertisements
Advertisements
प्रश्न
How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.
Advertisements
उत्तर
If current I is drawn from the battery, the current through each resistor will also be I.
On applying Ohm's law to the two resistors separately, we further
have
`"V"_1 = "I R"_1`
`"V"_2 = "I R"_2`
`"V" = "V"_1 + "V"_2`
`"IR" = "I R"_1+ "I R"_2`
`"IR" = "I " ["R"_1+ "R"_2]`
`"R" = "R"_1+ "R"_2`
Total Resistance in series R
`"R" = "R"_1+"R"_2+"R"_3`
APPEARS IN
संबंधित प्रश्न
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
Name the physical quantity whose unit is "ohm".
Ohm's law gives a relationship between:
(a) current and resistance
(b) resistance and potential difference
(c) potential difference and electric charge
(d) current and potential difference
A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. Assuming that it has a uniform cross section, what will be its new resistance?
What length of copper wire of resistivity 1.7 × 10-8 Ω m and radius 1 mm is required so that its resistance is 2Ω?
How does an increase in the temperature affect the specific resistance of a :
(i) Metal and
(ii) Semiconductor ?
Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.
Define the following:
Coulomb
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
What is ohmic device?
