Physic

posted by .

These three are connected to 240V main supply :
Grill = 6A
Desk lamp = 0.6A
Convector heater = 4.5
a(ii) which of these has the greatest resistance ? Explain how you can tell.
(ii) calculate the resistance of the grill
(iii) calculate the power rating of the convector heater
(b) the plug fitted to the convector heater has three wires : live,neutral,earth.
(i) which wire in the plug has no current passes in normal circumstances. Explain the safety of this wire.
(ii) why is it important that the wire connecting the heater to the main supply have a low resistance?

  • Physics -

    Someone will be happy to critique your thoughts. The three apliances are wired in parallel to the 240 V supply. Because of Ohm's Law, current is inversely proportional to resistance.

    Take it from there.

    The subject is physics, not physic. A physic is a laxative.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. ap physics

    can you please check my answers and help me with one question?
  2. ap physics

    can you please check my answers and help me with one question?
  3. physics 102

    three lamps connected to a 120-V AC (rms) household supply voltage. Lamps 1 and 2 have 75.0-W bulbs; lamp 3 has a 40.0-W bulb. (a) For each bulb, find the rms current. Irms, lamp 1 = A Irms, lamp 2 = A Irms, lamp 3 = A (b) For each …
  4. Physics

    Two resistors connected in series have an equivalent resistance of 783.4 Ω. When they are connected in parallel, their equivalent resistance is 171.3 Ω. Find the resistance of each resistor. 1) small resistance (ohm) 2) large …
  5. Algebra

    Two lamps can be connected to a battery in a circuit in series or in parallel. You can calculate the total resistance RT (t is down from r) in a circuit if you know the resistance in each lamp. Resistance is measured in ohms. For a …
  6. Algebra

    Two lamps can be connected to a battery in a circuit in series or in parallel. You can calculate the total resistance RT (t is down from r) in a circuit if you know the resistance in each lamp. Resistance is measured in ohms. For a …
  7. electrical principles

    Four resistors , each of 240ohms are connected in parallel , and the group then joined in series with a heater of 40ohms resistance. Then complete circuit is connected to a 240volts supply . Calculate total resistance in the circuit …
  8. science

    An electric lamp rated at 48w,12-v supply. Calculate the current flowing in the lamp and the resistance
  9. Science: Physics

    An electric heater of power 2500 W is connected to a voltage of 230 V. i) Calculate the electric current going through the heater. ii) What is the resistance of the heater?
  10. physics

    A hose contains 20 lamps of 200 W for each lamp and a heater of power 1500 W. they are all connected to supply voltage of 240 volt. Calculate; (a) The total current when all loads operates at the same time. (b) Total energy when 10 …

More Similar Questions