Current Electricity and Electrical InstrumentMedium

Question

Same length of two identical wires are first connected is series and them in parallel then the amount of heat produced in both the conditions are in the ratio:

Options

A.1 : 4
B.4 : 1
C.3 : 1
D.1 : 2

Solution

       
         
Let the resistance be r for each wire.
Heat generated = I2(2r) = 2I2r
where I is current through both of them. when they are connect in parallel each
will have current = .
Heat generateed = rt × 2 = .
Ratio of heat generated in two case

Create a free account to view solution

View Solution Free
Topic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions

More Current Electricity and Electrical Instrument Questions

Eels are able to generate current with biological cells called electroplaques . Theelectroplaques The electroplaques is ...Two resistances equal at 0oC with temperature coefficient of resistance α1 and α2 joined in series temperature...A silver wire of length 10 metre and cross-sectional area 10-8 m2 is suspended vertically and a weight of 10 N is attach...In the following circuit if VA−VB = 4V, then the value of resistance X in ohms will be : -...A battery of internal resistance 4W is connected to the network of resistance as shown. In the order that the maximum po...