मराठी

How Many Joules of Electrical Energy Are Transferred per Second by a 6 V; 0.5 a Lamp? (A) 30 J/S (B) 12 J/S (C) 0.83 J/S (D) 3 J/S - Science

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प्रश्न

How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp? 

(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s

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उत्तर १

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर २

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ३

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ४

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ५

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ६

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ७

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ८

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com

उत्तर ९

(d) 3 J / s
Electrical energy transferred per second,

`E=V xx I xx t =6Vxx0.5Axx1s=3 "J/s"`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Electricity - Exercise 7

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

An electric bulb is connected to a 220 V power supply line. If the bulb draws a current of 0.5 A, calculate the power of the bulb.


A 2 kWh heater, a 200 W TV and three 100 W lamps are all switched on from 6 p.m. to 10 p.m. What is the total cost at Rs 5.50 per kWh?


State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answer.


An electric bulb is rated 250 W, 230 V. Calculate:

  1. the energy consumed in one hour
  2. the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

Define 1 kilowatt hour. 


Write the SI units for:
(a) Electric current

(b) Potential difference

(c) Charge.


Distinguish between electric power and electrical energy. State their units. Give the other name of kWh.

In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours every day. How much is the electric energy consumed during the month of June?

A dynamo converts one from of energy into another. Name the two forms of energy.

State the position of heating element with respect to principal focus of concave reflector and give reason for choosing this position.


Two electric lamps each rating 100 W, 110 V are connected in series to a 220 V power supply and two other electric lamps each of marking 100 W, 220 V are connected in parallel to the same power supply. Will anyone of the two combinations give more light than the other? Give a reason for your answer.


What is the order of current drawn by appliances connected to the ‘power circuit’ of a household?


A family uses a light bulb of 100W, a fan of 100W, and a heater of 1000W, each for 8 hours a day. If the cost of electricity is Rs. 2 per unit, what is the expenditure to the family per day, on electricity?


An electric appliance is rated at 1000 W, 250V. Calculate:
(i) The electrical energy consumed by the appliance in 12 hour.
(ii) The cost of energy consumed at Rs. 1.20 per kWh.
How long would this appliance take to use 1 kWh energy when operated at 250 V?


Find the cost of operating an electric toaster for two hours if it draws 8 A current on a 110 volt circuit. The cost of electrical energy is Rs. 2.50 per kWh.


A consumer uses 4 lamps of 60 watt, 2 lamps of 40 watt, and 2 lamps of 100 watt. All these are used for 6 hour daily. Find the total bill for 30 days when the rate of energy is 75 paise per unit and the meter rent is Rs. 1.


A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:


A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is ______.


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