Chapter 10 Wave Optics Question 1. Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected, and (b) refracted light ? Refractive index of water is 1.33. (C.B.S.E. Sample Paper...
Chapter 9 Ray Optics and Optical Instruments Question 1. A small candle 2.5 cm in size is placed 27 cm in front of a concave mirror of a radius of curvature of 36 cm. At what distance from the mirror should a screen be placed in order to receive a sharp image?...
Chapter 8 Electromagnetic Waves Question 1. Figure shows a capacitor made of two circular plates each of radius 12 cm and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in figure). The charging current is constant and equal to...
Chapter 7 Alternating Current Question 1. A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply. (a) What is the rms value of current in the circuit? (b) What is the net power consumed over a full cycle? Answer: Question 2. (a) The peak voltage of an a.c. supply...
Chapter 6 Electromagnetic Induction Question 1. Predict the direction of induced current in the situations described by the following Fig. 2(a) to (f). Answer: (a) By Lenz’s law, the face of the coil towards the south pole of the magnet opposes the south pole. So this...
