Advertisements
Advertisements
Question
When a current I flows through a resistance R for time t, the electrical energy spent is given by ______.
Options
IRt
I2Rt
IR2t
I2R/t
Advertisements
Solution
When a current I flows through a resistance R for time t, the electrical energy spent is given by I2Rt.
Note: Electrical energy (W) = I²Rt = VIt = `("V"^2"t")/"R"`
APPEARS IN
RELATED QUESTIONS
Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.
Name the S.I. unit of electrical energy. How is it related to Wh?
What is consumed while using different electrical appliances, for which electricity bills are paid?
An electric toaster draws current 8 A in a circuit with source of voltage 220 V. It is used for 2 h. Find the cost of operating the toaster if the cost of electrical energy is ₹ 4.50 per kWh.
Find out the energy conversion that take place in the following.
Electric Iron box : _______ _______
Find out the energy conversion that takes place in the following.
Electric fan : ________
Electrical energy is used to run electric trains.
Electric eel can generate ______.
Name the particles of atom?
What is electric energy?
Write the uses of Electric energy.
The ground state energy of a hydrogen atom is - 13.6 eV When its electron is in the first excited state, its excitation energy is
Units of electrical energy are ______
Name the physical quantity which is measured in kWh.
Name the physical quantity which is measured in Wh.
A bulb of power 60 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
