Science
The electric circuit (below figure) in a clothes dryer contains two heaters X and Y in parallel. The below figure shows the circuit connected to a 230 V power supply. When both switches are closed, the current in X is 3.5 A.
Analyse the circuit given above and answer the following questions.
(a) Calculate the power developed in heater X.
(b) If the resistance of X is double that of Y calculate the current in heater Y.
Related Questions
The below figure shows the formation of an image by a lens shown by a thick line.
Analyse the figure and answer the following questions.
(a) What is the type of lens used?
(b) What is the nature of the image?
(c) If the image is formed at a distance of 30 cm from the lens and the image is twice the size of the object, then where is the object placed?
(a) What type of lens always forms a virtual erect and diminished image?
(b) List two uses of such a lens.
We have four resistors A, B, C and D of resistance 3 Ω, 6 Ω, 9 Ω and 12 Ω respectively. Find out the lowest resistance which can be obtained by combining these four resistors.