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
Differentiate between resistances in series and parallel.
State the law of combination of resistances in parallel.
Which of the following arrangement, A or B, has the lower combined resistance?

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.
A battery of e.m.f 16 V and internal resistance 2 Ω is connected to two resistors 3Ω and 6Ω connected in parallel. Find:
- the current through the battery.
- p.d. between the terminals of the battery,
- the current in 3 Ω resistors,
- the current in 6 Ω resistor.
An electrical appliance has a rating 100 W, 120V. The resistance of element of appliance when in use:
Calculate equivalent resistance in the following cases:


Calculate the current flows through the 10 тДж resistor in the following circuit.

Three resistors of 1 тДж, 2 тДж and 3 тДж are connected in parallel. The combined resistance of the three resistors should be:
You have three resistors of values 2 Ω, 3 Ω, and 5 Ω. How will you join them so that the total resistance is less than 1 Ω? Draw a diagram and find the total resistance.
