Question

What happens if you plug in a heater device rated for 110 V, 50 Hz in a household AC electric supply plug in India?
1. It burns out within minutes or even in seconds.
2. It will work normally.
3. Its heat supply would be poorer than its rates value.
4. You cannot use such a device in an Indian plug.

Answer 1

Correct Answer - Option 1 : It burns out within minutes or even in seconds.

The correct answer is It burns out within minutes or even in seconds.

• If the 110V appliance is connected to a 50 Hz power supply, the power may quadruple at the moment the appliance is switched on, and the appliance will quickly operate in an overvoltage condition. It may be accompanied by smoke and flash, or the fuse will melt and the protection part will be damaged. 
• Note:
  • It is very important to supply any device with a voltage in the range it is designed for.
  • For example, connecting a device that is designed for 110V to a 230V supply can be very dangerous.
  • There is the risk of burning, fire, or even explosion. It should not be assumed that connecting a higher voltage (220-240V) device to a low voltage supply (110V) is risk-free, although certainly less dangerous than the other way round.

• Electric Dipole and Capacitor
  • An electric dipole consists of two equal and opposite point charges separated by a very small distance.
  • The electric dipole moment of the dipole is the product of charge and the separation between the charges.
  • A capacitor or condenser is a device over which a large amount of charge can be stored without changing its dimensions.
  • The capacitance of a conductor is equal to the ratio of the charge (q) given to the conductor to change in its potential (V) is given by C = qV.
  • Its unit is coulomb/volt or farad. Farad ((F) is a large unit of capacitance. Its practical unit is microfarad (μF).
  • 1μF=10−6F
• Electric Current
  • An electric current whose magnitude and direction do not change with time is called direct current, and whose magnitude changes continuously and direction changes periodically is called alternating current.
  • The inverter is a device that converts DC to AC.
  • In solid conductors, electric current flows due to the flow of electrons, in liquids due to the flow of ions as well as electrons, and in semiconductors due to the flow of electrons and holes.
  • Its S.I. unit is Ampere.
• Resistance
  • Resistance is the opposition that a substance offers to the flow of electric current.
  • It is represented by R.
  • Its S.I. unit is the ohm.