English

Write the Formula for Electric Power in Terms of Potential Difference and Current.

Advertisements
Advertisements

Question

Write the formula for electric power in terms of potential difference and current.

Advertisements

Solution 1

In terms of potential difference and current, electric power is given as:
Electric power, P = potential difference, V x current, I
                      P = VI

shaalaa.com

Solution 2

In terms of potential difference and current, electric power is given as:
Electric power, P = potential difference, V x current, I
                      P = VI

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity - Exercise 7

APPEARS IN

Lakhmir Singh Physics [English] Class 10
Chapter 4 Electricity
Exercise 7 | Q 29.1
Lakhmir Singh Physics [English] Class 10
Chapter 4 Electricity
Exercise 7 | Q 29.1

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Which of the following terms does not represent electrical power in a circuit?


Define watt-hour. How many joules are equal to 1 watt-hour?


What is the maximum power in kilowatts of the appliance that can be connected safely to a 13 A ; 230 V mains socket?


Define 1 kilowatt hour. 


What is wrong with the circuit diagram (Fig. 34)? Carefully check the symbols and assign proper positive and negative signs to them.


A simple electric circuit has a 30 V battery and a resistor ot 60 o. What will be the current in the circuit? The resistance of the oonnecting wires is negligible.


A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?


Distinguish between electric power and electrical energy. State their units. Give the other name of kWh.

In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours every day. How much is the electric energy consumed during the month of June?

Two resistors A and B of 4 Ω and 6 Ω, respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate the power dissipated in each resistor.


What is the energy conversion when an electric current passes through a metallic wire?


An electric current is passed through a metallic wire. The wire gets heated up. Give the reason. Is it possible to melt the wire by passing a heavy current?


Name three main characteristics of an heating element.


What is the function of the split rings in a d.c. motor?


An electric heater is rated 220 V, 550 W. What does this statement mean?


A family uses a light bulb of 100W, a fan of 100W, and a heater of 1000W, each for 8 hours a day. If the cost of electricity is Rs. 2 per unit, what is the expenditure to the family per day, on electricity?


The resistance of filament of an electric heater is 500 Ω It is operated at 200V for 1 hour daily. Calculate the current drawn by the heater and the energy consumed in joule.


A 100-watt electric bulb is used for 5 hours daily and four 60 watt bulbs are used for 5 hours daily. Calculate the energy consumed (in kWh) in the month of January.


Unit of electric power may also be expressed as:


A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×