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What should be the diameter of a soap bubble such that the excess pressure inside it is 51.2 Pa? [Surface tension of soap solution = 3.2 × 10−2 N/m]
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In a CE amplifier, the current gain is 80 and the emitter current is 9 mA. The base current is ______.
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What is a photocell or photoelectric cell?
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Describe its construction and working with a neat labelled diagram.
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Find the wavelength and wave number of the first member of the Balmer series in Hydrogen spectrum. (`R =1.097xx10^7m^(-1)`)
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A rectangular coil of wire 50 turn each of area 6 x 10-4 m2 is freely suspended in a field of 3 x 10-2 Wb / m2. Calculate the current flowing through the coil when it deflects through 60°, when torsional constant is 3.82 x 10-6 SI unit.
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Describe construction and working of a photo cell with the help of neat diagram.
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The internal energy of one mole of argon at 300 K is ______. (R = 8.314 J/mol.K)
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When the load resistance across a solar cell is zero, the current in the external circuit passed by the solar cell is called ______.
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The de-Broglie wavelength of the electron in the hydrogen atom is proportional to ______.
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State the dimensions of magnetization.
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State the dimensions of magnetization.
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What is the rotational analogue of Newton's second law of motion?
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State and define the SI unit of mutual inductance.
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Draw a neat labelled diagram of Internal resistance of a cell using a potentiometer.
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The speeds of a particle performing linear SHM are 8 units and 6 units at respective displacements of 6 cm and 8 cm. Find its period and amplitude.
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The molar specific heat of He at constant volume is 12.47 J/mol.K. Two moles of He are heated at constant pressure. So the rise in temperature is 10 K. Find the increase in internal energy of the gas.
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State dimension of potential gradient.
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Two coils having self inductances L1 = 75 mH and L2 = 55 mH are coupled with each other. The coefficient of coupling (K) is 0. 75. Calculate the mutual inductance (M) of the two coils
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