BITSAT - Physics मॉक टेस्ट

A photodiode is operated in reverse bias because:

One mole of an ideal gas at 300 K undergoes an isothermal expansion from volume V to 2V. The work done by the gas is: (R = 8.314 J/mol K)

A body of mass m is tied to one end of a string of length L and whirled in a vertical circle. The minimum velocity at the lowest point to complete the circle is:

An AC source of 200 V rms supplies a circuit with a rms current of 10 A. If the power consumed in the circuit is 1 kW, the power factor of the circuit is:

Two identical springs each of spring constant k are connected in series. The effective spring constant of the combination is:

A circular loop of radius a carrying current I is placed in a uniform magnetic field B perpendicular to its plane. If the loop is slightly rotated about a diameter, the angular frequency of small oscillations is:

A p-n junction diode is forward biased. The width of the depletion layer:

A copper wire has resistance R and length l. If the wire is stretched to double its length without changing its volume, the new resistance will be: