Advertisements
Advertisements
рдкреНрд░рд╢реНрди
Two resistors having resistance 4ЁЭЫА and 6ЁЭЫА are connected in parallel. Find their equivalent resistance.
Advertisements
рдЙрддреНрддрд░
Let ' R be their equivalent resistance of the 4Ω and 6Ω resistors connected in parallel
Then, `1/R=1/4+1/6=(3+2)/12=5/12Ω`
Or, `R=12/5=2.4Ω`
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so that the total resistance is less than 1Ω? Draw diagram and find the total resistance.
Five resistors, each 3 Ω, are connected as shown in Fig. Calculate the resistance
- between the points P and Q.
- between the points X and Y.
Two resistors of resistance 4 тДж and 6 тДж are connected in parallel to a cell to draw 0.5 A current from the cell.
Calculate current in each resistor.
An electrical appliance having a resistance of 200 Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes in kWh.
Solve the following question:
In an electric circuit, two resistors of 12 0 each are joined in parallel to a 6 V battery. Find the current drawn from the battery.
How does the resistance of a metallic wire depend on the length of wire?
A given wire is stretched to double its length. How will its resistance change?
Calculate equivalent resistance in the following cases:
Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is:
The diagram above is a schematic diagram of a household circuit. The house shown in the above diagram has 5 usable spaces where electrical connections are made. For this house, the mains have a voltage of 220 V and the net current coming from the mains is 22A.
- What is the mode of connection to all the spaces in the house from the mains?
- The spaces 5 and 4 have the same resistance and spaces 3 and 2 have respective resistances of 20Ω and 30Ω. Space 1 has a resistance double that of space 5. What is the net resistance for space 5.
- What is the current in space 3?
- What should be placed between the main connection and the rest of the house’s electrical appliances to save them from accidental high electric current?
