Figure `7.37` shows a network of three resistances. When some potential difference is applied across the network , thermal powers dissipated by `A, B and C` are in the ratio

The three resistance A,B and C have values 3R,6R and R respectively.When some potential difference is applied across the network,the thermal powers dissipated by A,B and C are in the ration

When a potential difference (V) is applied across a conductor, the thermal speed of electrons is

(a) Two heater coils made of the same material are connected in paralled across the mains. The length of diameter of one the coil is triple that of other. Which of these will produce more heat? (b) Three equal resistors connected in series across a source of emf together dissipated 10 Watt of power. What would be the power disspated if the same resistors are connected in parallel across the same source of emf? Two resistor R_(1) and R_(2) may be connect either in series or in parellel across a battery of zero internal resistance. it is required that joule heating for the parallel combination be four times than for series combination. if R_(1)= 100 Omega find R_(2) (d) The three resistance A, B and C have values 3R, 6R and R respectively. Now some potential difference is applied across the network . Find the ratio of thermal powers dissipated between X and Y . find ratio of power consumed by A,B, and C .

Potential difference across AB in the network shown in figure.

Potential difference across AB in the network shown in figure.

Three identical resistors are connected in series . When a certain potential difference is applied across the combination , the total power would be dissipated is 27 W . How many times the power would be dissipated if the three resistors were connected in parallel across the same potential difference ?

Three identical resistors are connected in series . When a certain potential difference is applied across the combination , the total power would be dissipated is 27 W . How many times the power would be dissipated if the three resistors were connected in parallel across the same potential difference ?

Find the resistance of coil of power 60 W when potential difference of 240 V is applied across it