A 110 V light bulb takes 0.9 A current and operates 12h/day. Determine the energy consumed by the bulb for 30 days.

A 110 W, 220 V bulb draws a current

(i) A torch bulb is rated at 3V and 600 ma . Calculate it's (a) power (b) resistance (c) energy consumed if it used for 4 hours. (ii) Why does sound travel faster on a rainy day than on a dry day ?

A tourch bulb is rated at 3 V and 600 mA. Calculate a) Power b) Resistance c) Energy consumed if it is used for 4 hour.

(i) A torch bulb is rated at 3V and 600 mA. Calculate, (a) power (b) resistance (c ) energy consumed if it is used for 4 hours. (ii) Calculate the mass of a body weighing 100 dyne. g=10m//s^(2) .

A coil having inductance 2.0 H and resistance 20 Omega is connected to a battery of emf 4.0 V. Find (a) the current a the instant 0.20 s after the connection Is made and (b) the magnetic energy at this instant.

Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80 muF, R= 40Omega a. Determine the source frequency which drives the circuit in resonance b. Obtain the impedance of the circuit and the amplitude of current at the resonating frequency. c. Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the rasonating frequency .

A transformer is used to light a 140 W, 24 V bulb from a 240 V AC mains. The current in the main cable is 0.7 A. find the efficiency of the transformer.

When a 6000Å light falls on the cathode of a photo cell and produced photoemission. If a stopping potential of 0.8 V is required to stop emission of electron, then determine the energy of the incident photon