v40_newFlow

Find the current in each wire. epsilon = 50V, epsilon_2 = 40V epsilon_3 =30 V, epsilon_4 = 10V R_1 = 2Omega, R_2 = 2Omega R_3 = 1Omega

4 bulbs marked 40 W , 250 V are connected in series with 250 V mains. The total power is

The entropy of v = 4.0 moles of an ideal gas increases by Delta S = 23 J//K due to the isothermal expansion. How many times should the volume v = 4.0 moles of the gas be increased ?

The electric potential at point A is 20 V and at B is -40 V . Find the work done by an external and electrostatic force in moving an electron slowly from B to A.

A 30V, 40 w lamp is to be operated on a 120 V DC lines. For proper glows, how much resistance in Omega should be connected in series with the lamp?

An electric bulb rated 220 V and 60 W is connected in series with another electric bulb rated 220 V and 40 W . The combination is connected across a source of emf 220 V . Which bulb will glow more?

Two electric bulbs one, if 200 V-40 W and other 200 V-100 W are connected in series to a 200 V line, then the potential drop across

" If two electric bulbs have "40W" and "60W" rating at "220V" ,then the ratio of their resistances will be "

The X-rays produced in a coolidge tube of potential difference 40 V have minimum wavelength of