हिंदी

1 Calorie = _________ Joule.

Advertisements
Advertisements

प्रश्न

1 calorie =  _________ joule.

Advertisements

उत्तर

1 calorie = 4.18 joule

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2017-2018 (March)

APPEARS IN

संबंधित प्रश्न

An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.


State two factors on which the electrical energy consumed by an electrical appliance depends.


Which quantity has the unit of watt?


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?


Define kilowatt-hour. 


Name the S.I. unit of electrical energy. How is it related to Wh?


State the S.I. unit of electrical power.


A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.


An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?


The diagram below shows a magnetic kept just below the conductor AB which is kept in North South direction.

(i) In which direction will the needle deflect when the key is closed ?
(ii) Why is the deflection produced ?
(iii) What will be the change in the deflection if the magnetic needle is taken just above the conductor AB ?
(iv) Name one device which works on this principle.


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?

Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.


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.


An electric heater is rated 220 V, 550 W. Electrical energy is also measured in kWh. What do you understand by a kilo-watt-hour?


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?


Establish the relation that heat produced in a metallic conductor due to the flow of current is V2t/R joules, where V is the potential difference across the ends of the conductor, R its resistance and t is the time in second for which current flows.


A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly


Using a long extension cord in which each conductor has a resistance of 8Ω, a bulb marked as '100 W, 200 V' is connected to a 220 V dc supply of negligible internal resistance as shown in the figure. The power delivered to the bulb is ______ W.

 


A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×