Home
Class 10
PHYSICS
A tourch bulb is rated at 3 V and 600 mA...

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.

Text Solution

Verified by Experts

Given : The potential of tourch bulb V = 3V
Current I = 600 ma
`=600xx10^(-3) = 0.6 A`
To find: a) Power P = ?
b) Resistance, R = ?
c) Energy consumed = ?
a) P = VI = `3xx0.6 = 1.8 W`
`V = IR implies R = (V)/(I)`
b) Resistance, R = `(3)/(0.6) = 5 Omega`
c) Energy consumed for 4hr = power of the bulb`xx` time
`=1.8xx4`
Energy, E = 7.2 wh
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    SURA PUBLICATION|Exercise TEXTBOOK EVALUATION (Hots)|3 Videos

  • ELECTRICITY

    SURA PUBLICATION|Exercise GOVERNMENT EXAM QUESTIONS & ANSWERS|3 Videos

  • ELECTRICITY

    SURA PUBLICATION|Exercise TEXTBOOK EVALUATION (Long Answer Questions)|1 Videos

  • ACOUSTICS

    SURA PUBLICATION|Exercise ADDITIONAL QUESTIONS & ANSWERS (VALUE B ASED QUESTION)|2 Videos

  • HALF YEARLY MODEL QUESTION PAPER

    SURA PUBLICATION|Exercise MCQ.s|24 Videos

Similar Questions

Explore conceptually related problems

(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) .

(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 light bulb is rated 100 W for 200 V AC supply of 50 Hz. Calculate (i) resistance of the bulb (ii) the rms current through it.

The plate current, plate voltage and grid voltage of a 6F6 triode tube are related as i_p = 41 (V_p + 7 V_g)^(1.41) where V_p and V_g are in volts and i_p in microamperes. The tube is operated at V_p = 250 V, V_g = -20 V . Calculate (a) the tube current, (b) the plate resistance, (c) the mutual conductance and (d) the amplification factor.

A 100 watt bulb is used for 5 hours daily and four 60 watt bulbs are used for 5 hours daily. Calculate the energy consumed (in kWh) in the month of January.

A light bulb is at 100 W for a 220 V supply . Find (a) the resistance of the bulb , (b) the peak voltage of the source , and (c ) the rms current through the bulb.

The junctions of a Ni-Cu thermocouple are maintained at 0^@ C and 100^@ C . Calculate the Seebeck emf produced in the loop. a_(Ni, Cu) = 16.3 xx 10^(-6) V^@ C^(-1) and b_(Ni, Cu) = - 0.042 xx 10^(-6) V^@ C^(-3)

An electric iron has a resistance of 80 Omega and is connected to a source of 200 V. If it is used for two hours then Calculate the electrical energy spent.