A 60 W lamp is rated at 0.8 watt/candela. Calcualte:
luminous flux of the lamp.

A 60 volt , 10 watt lamp is to be run on 100 volt-60 hertz a.c. mains. Calculate the inductance of the choke required

A 30 V . 90 W lamp is to be operated on a 120 V d.e. line for proper glow, a resistor of .. Omega should be connected in series with the lamp

A 100 W sodium lamp radiates energy uniformly in all direction. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. At what rate are the photons delivered to the sphere?

A 100 W sodium lamp radiates energy uniformly in all direction. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. What is the energy per photon associated with the sodium light?

Two electric bulbs have tungsten filaments of the same length. If one of them is rated 60 watt and the other 100 watt then which one has thicker filament wire?

An electric bulb is rated 60W, 240V. Calculate its resistance. If the volatage drops to 192v, calculate the power consumed and the current drawn by the bulb.[Assume the resistance of the bulb remians unchanged].

A 100 W (Watt) sodium Lamp radiated energy uniformly in all directions. The lamp is located at the centre of a large sphere, that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm(nano metre): At what rate are the photons delivered to the sphere?

A 60 volt , 10 watt lamp is to be run on 100 volt-60 hertz a.c. mains. Calculate if resistance is to be used instead of choke, what wil be its value?

A 20 watt, 50 volt filament is connected in series to an a.c. mains of 250 volt - 50 hertz. Calculate the value of the capacitor required to run the lamp.

A man who is 1.6 m tall walks away from a lamp which is 4 m above ground at the rate of 30 m/min. How fast is the man's shadow lengthening?