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
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 ?
Knowledge Check
4 bulbs marked 40 W , 250 V are connected in series with 250 V mains. The total power is
A
10 W
B
40 W
C
320 W
D
160 W
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?
A
`67.5Omega`
B
`4.75Omega`
C
`75.6Omega`
D
none
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
A
the two bulbs is the same
B
Both the bulbs is 200 V
C
40 W bulb is greater than the potential drop across 100 W bulb
D
100 W bulb is greater than the potential drop across 40 W bulb
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