The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1MeV energy is nearly

A 220 V AC supply is connected between points A and B (figure). What will be the potential difference V across the capacitor?

 

The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?

Two batteries of emf ε₁ and ε₂, (ε₂ >ε₁) and internal resistances r₁ and r₂ respectively are connected in parallel as shown in figure.

In a nuclear reactor, moderators slow down the neutrons which come out in a fission process. The moderator used have light nuclei. Heavy nuclei will not serve the purpose, because

The gravitational force between a H-atom and another particle' of mass m will be given by Newton's law \(F=G \frac{M m}{r^{2}}\), where r is in km

A capacitor of 4\(\mu\)F is connected as shown in the circuit. The internal resistance of the battery is 0.5\(\Omega \). The amount of charge on the capacitor plates will be

When a voltage measuring device is connected to AC mains, the meter shows the steady input voltage of 220 V. This means

There are two coils and B as shown in figure. A current starts flowing in B as shown, when A is moved towards B and stops when A stops moving. The current in A is counter clockwise. B is kept stationary when A moves. We can infer that