In an electric bulb, light is produced due to the glowing of (a) the glass case of the bulb.

(i) Total numbers of bulbs = 20 Numbers of defective bulbs = 4 Probability of getting a defective bulb = 4/20 = 1/5 (ii) One non defective bulb is drawn in (i) then...

Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...

The resistance of 60watt bulb is greater than the resistance of 100watt bulb.

The resistance of a heater coil is less than that of electric bulb filament. When heater is switched on in parallel, more current start flowing through the heater coil and...

The resistance of the bulb is given by R=(V2/P). So, the resistance of 60 W bulb is more than the resistance of 100 W bulb. When they are connected in...

P = 100W = 0.1 W t = 3 h Energy consumed by 100 W bulb per day = 0.1×3 = 0.3 kWh Energy consumed per day by four 60 W bulbs =...

The resistance of the bulb is given by R =v2/ P. So, the resistance of 60 W bulb is more than the resistance of 100 W bulb. When they are connected...

(a) For a thin prism, D = (μ – 1) A Since λb < λr ⇒ μr < μb ⇒ D1 < D2

P = 100w V = 220v Case I : Excess power = 100 – 40 = 60w Power converted to light = (60 x 60)/100 = 36w Case II : Power = (220)2/484...

(a) Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect...