Advertisements
Advertisements
Question
When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.
Options
I2Rt
IR2t
IRt
IRt2
Solution
When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by I2Rt.
Explanation:
Due to joules law of heating.
APPEARS IN
RELATED QUESTIONS
Why are the coils of electric irons and electric toasters made of an alloy rather than a pure metal?
A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.
Derive the expression for the heat produced due to a current 'I' flowing for a time interval 't' through a resistor 'R' having a potential difference 'V' across its ends. With which name is this relation known?
How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?
Rewrite the following statement by selecting the correct option:
1 A = ____________ mA.
Name any two appliances which works on the phenomenon of heating effect of electric current.
Name some devices that run using heat effect of electric current
(a) Observe the diagram given below and state whether the bulb will glow or not when we switch on K.
(b) Is it safe to handle the bulb when the switch is OFF?
(c) Give a reason for your answer in (b).
Can we use the same fuse in a geyser and a television set? Explain.
Name two electric devices for each where
(i) the heating effect of current is used and
(ii) the magnetic effect of current is used.