Thermal Effect, Torque and more

What is an electric heater?

•  It is:

  • an mechanical device

  • that converts

  • an electric current

  • into heat.

•  It is:

  • an electrical device

  • that converts

  • an electric current

  • into heat.

•  It is:

  • an electrical device

  • that converts

  • an electric current

  • into wind.

•  It is:

  • an electrical device

  • that converts

  wind

  • into heat.

 The heating element inside every electric heater,

 is an ...

• blowing resistor

• mechanical resistor

• electrical pan

• electrical resistor.

What is Joules Heating?

• An electric current passing through a resistor, will convert that electrical energy into heat energy.

•  An electric current passing through a resistor, will convert that electrical energy into wind energy.

• An electric current passing through a resistor, will convert that electrical energy into energy.

• An electric current passing through a conductor, will convert that electrical energy into heat energy.

 What is meant by heating effect of electric current?

•  When an electric current passes through a conductor, (wire) the conductor becomes hot after some time

   and produces heat.

•  When an electric current passes through a conductor, (wire) the conductor becomes cold after some time

   and produces heat.

•  When an electric current passes through a conductor, (wire) the conductor becomes hot after some time

   and produces ice.

•  When an electric current passes through a insulator, (wire) the conductor becomes hot after some time

   and produces heat.

What is thermal effect of electric current ?

•  The greater the resistance in the wire

   to the flow of current, the greater the heat.

• The lower the resistance in the wire

   to the flow of current, the greater the heat.

• The less the resistance in the wire

   to the flow of current, the greater the heat.

• The smaller the resistance in the wire

   to the flow of current, the greater the heat.

What are the factors affecting the heat, due to electric current?

• Intensity (strength) of the current “I”

  Time of the flow of the current “t”

• Resistance of the conductor “R”

  Time of the flow of the current “t”

• Resistance of the conductor “R”

  Intensity (strength) of the current “I”

  Time of the flow of the current “t”

• Resistance of the conductor “R”

  Intensity (strength) of the current “I”

 The heat produced by an electric current is...

•  equal to the

    the time for which it flows.

•  equal to the

   product of the resistance of the conductor,

   the square of the current,

   and the time for which it flows.

• is equal to

   the square of the current,

   and the time for which it flows.

•  equal to the

   product of the resistance of the conductor.

The formula for Electrical Power is...

•  P = VI

•  P = VIt

•  P = Vtt

•  W = VIt

What is the formula for Joule's Law?

• Q = I² x R x t

• Q = I² x R x T

• Q = I² + R + t

• Q = I x R x t

 The heat generated by the electric heater, is equal to the work done by the current.

• Always

• Sometimes

• Seldom

• Never