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X-rays of wavelength lemda fall on photo-sensitive surface, emitting electrons. Assuming that the work function of the surface can be neglected. Find the de-Broglie wavelength of electrons emitted. emitting electrons. Assuming that the work function of the surface can be neglected. Find the de-Broglie wavelength of electrons emitted. X-rays of wavelength lemda fall on photo-sensitive [...]

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency? For the series LCR circuit shown in the figure what is the resonance frequency and the amplitude of the current at the resonating frequency? September 11, 2020 Category: Uncategorised (JEE Advanced [...]

Find the typical de Broglie wavelength associated with a He atom in helium gas at room temperature (27 C) and 1 atm pressure; and compare it with the mean separation between two atoms under these conditions. A monochromatic light of wavelength lemda is incident on an isolated metallic sphere of radius a. The threshold wavelength [...]

A small size perfectly reflecting mirror of mass is suspended by a weightless thread of length l as shown in figure. Find the angle through which the thread will be deflected when a A small size perfectly reflecting mirror of mass is suspended by a weightless thread of length l as shown in figure. Find [...]

A planet of mass M and radius R emits a photon of frequency f. What will be the frequency of photon when it covers an infinite distance? A planet of mass M and radius R emits a photon of frequency f. What will be the frequency of photon when it covers an infinite distance? September [...]

In an LCR circuit, R = 100 ohm. When capacitance C is removed, the current lags behind the voltage by pie/3. When inductance L is removed, the current leads the voltage by pie/3. The importance of the circuit is In an LCR circuit R = 100 ohm. When capacitance C is removed the current lags [...]

In the circuit shown below, the ac source has voltage V = 20 cos ( omega t) volts with omega = 2000 rad/s. The amplitude of the current will be nearest to In the circuit shown below the ac source has voltage V = 20 cos ( omega t) volts with omega = 2000 rad/s. [...]

Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the emf of AC is increased, the effect on the value of the current will be. Same current is flowing in two alternating circuits. The first circuit contains only inductance [...]

The figure shows variation of R, XL and XC with frequency f in a series L, C , R circuit. Then for what frequency point. the circuit is inductive? C R circuit. Then for what frequency point. the circuit is inductive? The figure shows variation of R XL and XC with frequency f in a [...]

For a series RLC circuit R = XL = 2XC. The impendence of the circuit and phase difference between V and i will be For a series RLC circuit R = XL = 2XC. The impendence of the circuit and phase difference between V and i will be September 11, 2020 Category: Uncategorised (JEE Advanced [...]