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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 potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is

The potential defferences across the resistance capacitance and indutance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is

The potential differences across the resistance, capacitance and inductance are 80V , 40V and 100V respectively in an L-C-R circuit. The power factor of this circuit is

There are two bulbs marked (a) 220V, 160W (b) 220V, 40W. Which has higher resistance?

Out of the four bulbs of marking (i) 100V,40W (ii) 200V,40W (iii) 100V,60W (iv) 200V,60W ,which bulb has highest resistance

In given figure the ammeter A reads 5 A and voltmeter V reads 40 V. The actual value of resistance R is

In the figure shown, the reading of voltmeters are V_1 = 40 V, V_2 = 40 V and V_3 = 1 0 V . Find (a) the peak value of current (b) the peak value of emf (c) the value of L and C .

The work done against electric in increasing the potential difference of a condenser from 20 V to 40 V is W. The work done in increasing its potential difference from 40 V to 50 V will be