Advertisements
Advertisements
प्रश्न
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
Advertisements
उत्तर
i.
The parallel combination of two resistors 4 Ω and 6 Ω that draws a current of 0.5 A from the cell is as shown below.
ii.
In parallel combination of resistors potential difference across each resistor is same as the potential difference across the terminals of the battery.
Here current drawn from cell, I = 0.5 A
The effective resistance `1/R=1/R_1+1/R_2`
Here R1=4Ω and R2=6Ω
`therefore 1/R=1/4+1/6`
`therefore 1/R=5/12`
`therefore R=12/5`
`therefore R=2.4 Omega`
APPEARS IN
संबंधित प्रश्न
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
How does the resistance of an alloy, vary with temperature?
How does the resistivity of an alloy such as constantace depends on temperature.
What is a resistance? Define it with respect to Ohm’s law,
Illustrate-combination of cells e.g., three cells, in parallel, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
What is the maximum resistance which can be made using five resistors each of `1/5` W?
When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
