A heater is rated at 1200 W when the electric current is 5 A. Calculate the resistance and the potential difference. - Physics

A heater is rated at 1200 W when the electric current is 5 A. Calculate the resistance and the potential difference.

Numerical

We know that,

P=VI= I1R

Given, P = 1200 watt , I= 5A

R = `"P"/"I"^2 = 1200/(5 xx 5) = 48 Omega`

and, V = `"P"/"I" = 1200/5` = 240 V

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Chapter 4: Current Electricity - Exercise 4.2 ii [Page 188]

Chapter 4 Current Electricity
Exercise 4.2 ii | Q 3 | Page 188

Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.

What is the SI unit of potential difference?

If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?

The other name of potential difference is:

Name the law which relates the current in a conductor to the potential difference across its ends.

A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?

Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?

Explain the analogy between the flow of charge (or current) in a conductor under a potential difference with the free fall of a body under gravity.

If P and V are the power and potential of device, the power consumed with a supply potential V₁ is:

What is the measure of the work done on the unit positive charge to bring it to that point against all electrical forces?