Advertisements
Advertisements
Question
Calculate the effective resistance across AB?
Advertisements
Solution
5 Ω and 4Ω are in series
∴ R1 = (5 + 4)Ω = 9Ω
Now, 9Ω and 3Ω are in parallel
`therefore R_2 = (9 xx 3)/(9+3)=9/4Ω`
Now, 2 8Ω and R2 are in series
`therefore R_3 = 8 +9/4 =41/4 Ω= 10.25Ω`
APPEARS IN
RELATED QUESTIONS
An electrical bulb is marked 200V, 100W. Calculate the electrical resistance of its filament. If five such
bulbs are connected in series to a 200V supply, how much current will flow through them?
Name the law which is illustrated by the above V−I graph.
What is an ohmic resistor? Give one example of an ohmic resistor. Draw a graph to show its current voltage relationship. How is the resistance of the resistor determined from this graph?
In the circuit shown in the figure, find the total resistance of the circuit and the current in the arm AD.
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 parts from A to F. state the function of each.
Ohm’s law states the relationship between power and voltage.
Explain the equivalent resistance of a parallel resistor network.
An electronics hobbyist is building a radio which requires 150 Ω in her circuit, but she has only 220 Ω, 79 Ω, and 92 Ω resistors available. How can she connect the available resistors to get the desired value of resistance?
The temperature of a conductor is increased. The graph best showing the variation of its resistance is:
