Homework Help: Physic

Posted by Janice on Saturday, June 4, 2011 at 6:48am.

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 - drwls, Saturday, June 4, 2011 at 7:59am
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.

Answer this Question

Related Questions

Am I doing Algerba right? - 6a for a = 3 and a = -4 So is it A. 6a = 6*3 = 18? B...
Physics - A lamp (R = 151 ), an electric heater (R = 24 ), and a fan (R = 49 ) ...
algebra - Given g(x) = –2x – 1, find g(3a). G(3a)=-2(3a)-1 = -6a-1 = -...
Math! - 6a + 5b = 10 , 6a - b = -110 a=________ b=_________ 6a + 5b = 10 6a - b...
Math Help - (6a)^8*(6a)^7 I get 36a^15 but I feel this is wrong
Algebra - solve by elimination: 6a+2b = -48 -6a+b = 57 What is the solution set...
math - can someone help me find the LCM? 35c^6a^8, 5c^3a^3, 21c^6a^3
Math - Use the method of substitution to solve the linear equation! 6a=6-b 6a=5-...
physics 102 - three lamps connected to a 120-V AC (rms) household supply ...
Help - Divide and simplify 6a+18/a-3 divide by a+3/a-4 I got 6a-24/a-3

For Further Reading

First Name:
School Subject:
Answer: