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Choose the correct option. Statement 1: The shape of the moon changes everyday and the various shapes seen during a month are called phases of the moon.   Statement 2: Moon has no light of its own. We see only that part of moon, which reflects light of the sun to us. The position of moon changes due to its revolution around earth and hence the portion of moon reflecting the light of sun to us.

The moon does not produce its own light, whereas the Sun and other stars do. We see the moon because... View Article

Choose the statements which state laws of reflection correctly? Statement 1: Angle of incidence is greater than the angle of reflection Statement 2: Angle of incidence is less than the angle of reflection Statement 3: Angle of incidence is equal to the angle of reflection Statement 4: The incident ray, the normal at point of incidence and the reflected ray all lie in the same plane.

The first law of reflection states that the angle of incidence is equal to the angle of reflection. And the second... View Article

Between the plates of a parallel plate capacitora dielectric plate is introduced just to fill the space between the plates. The capacitor is charged and later disconnected from the battery. The dielectric plate is slowly drawn out of the capacitor parallel to the plates. The plot of the potential difference across the plates and the length of the dielectric plate drawn out is                                [MP PET 1997]

While drawing the dielectric plate outside, the capacitance decreases till the  entire plate comes out and then becomes constant. So,... View Article