Electrical Powe...

A hairstylist uses a hairdryer of 750 watt for 25 minutes everyday. Find the cost to use it everyday for one year at the rate of Rs. 6.5 per Kwh.

Which of the following conditions is correct when power is transferred from one station to another?

Which of the following statements is NOT correct for switch off position of a switch connected in live wire?

Which of the following relationships is not true?

Where, W = Work done in joules
             Q = Electric charge in coulombs
             V = Potential difference in volts
              I = Current in amperes
             R = Resistance in ohms
              t = Time

Which of the following systems are used in house wiring?
(A) Tree system
(B) Branch system
(C) Stem system
(D) Ring system

Which of the following should a fuse wire have, used for household supply of electricity  for safety purpose?

A pole fuse is

What should be the colour of live wire while wiring a plug?

Why are the electrical appliances used for household earthed?

Which of the following materials is used to make live wires?

A current in a lamp fixed on a wall is rated at 4 A. What should be the best fuse to use in the plug of lamp?

What happens to resistance of an appliance if voltage rating is doubled and power rating is four times?

Two coils of resistances R₁ = 6  and R₂ = 10  are connected in series across a battery of potential difference 12 V. Find the total energy supplied by battery in 90 seconds.

In which wire of an appliance should a fuse be connected so that a person may not get a shock?

Which of the following statements is not correct?

Which of the following statements is not correct for high tension wires?

Which of the following statements is not correct for MCB?

Why the top pin in a three - pin plug is kept thick and big as compared to other two pins?

Which of the following is not an advantage of ring system?