# Physic

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?

1. 👍 0
2. 👎 0
3. 👁 215
1. 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.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

Three similar ideal cells (no internal resistances) supply current of 0.5 Ampere to a 10 Ohms resistor when they are in the parallel.How much current will they supply to the same risistor when they are connected in series aiding?

2. ### Science

5. A child pushes a desk with a force of 15 N to the right. The desk accelerates to the right. Which of the following statements correctly represents Newtonâ€™s third law and the interaction between the child and desk? 1)The desk

3. ### math

A boy 1.2m tall, stands 6m away from the foot of a vertical lamp pole 4.2m long if the lamp is at the tip of the pole calculate the length of the shadow of the boy cast by the lamp Angle of elevation of the lamp from the boy,

4. ### physics

Three similar ideal cells (no internal resistances) supply current of 0.5 Ampere to a 10 Ohms resistor when they are in the parallel.How much current will they supply to the same risistor when they are connected in series aiding?

1. ### Physics (URGENT)

Three wire-wound resistors have the following values: 30 ohms, 80 ohms, and 100 ohms. Each resistor has a voltage rating of 100V. If these three resistors are connected in series, can they be connected to a 240V circuit without

2. ### Chemistry

A direct-current power supply of low voltage (less than 10 volts) has lost the markings that indicate which output terminal is positive and which is negative. A chemist suggests that the power supply terminals be connected to a

3. ### English

"I have but one lamp by which my feet are guided; and that is the lamp of experience." This is an example of a. an appeal to authority b. allusion c. conceit d. logic C? Thanks

4. ### math

A lamp shade is in the form of a frustrum of a cone the button ra duis is thrice the top raduis and the height is 14cm the volume of the lamp shade is 763cm find the button of the raduis , the area of the clothes to cover the lamp

1. ### English

1. The fluorescent lamp is over the desk. 2. An ant is beneath the table. 3. The cat is under the table. 4. A book is on the table. ----------------------- Does #1 mean that the fluorescent lamp is right above the table? If the

2. ### physics

A coil takes a current of 10.0 A and dissipates 1410 W when connected to a 230 V, 50 Hz sinusoidal supply. When another coil is connected in parallel with it, the total current taken from the supply is 20.0 A at a power factor of

3. ### science

an electric heater draws a current of 10A when connected to a 200 V supply. what current will the heater draw when it is connected to a 220 V supply.

4. ### Physics

A book with a mass of 1350 g is sitting on a desk. The ukf between the book and the desk is .45 and the ukf between the book and the desk is .30. a. how much horizontal force is required to start the book moving across the desk?