Advertisements
Advertisements
Question
Calculate the amount of energy transferred by a 10 A electric current flowing through a resistor of 5 o for 15 minutes.
Advertisements
Solution
As per Joule's law,
H=I2Rt
Here, I= 10 A, R = 5`Omega` and t=15 mins = 900s
H = (10)2 x 5 x (900) = 4.5 x 105 J
APPEARS IN
RELATED QUESTIONS
Which instrument is used to measure electric current? How should it be connected in a circuit?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(c) In which circuit, if one bulb blows out, all other will stop glowing?
A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire
State two differences between the e.m.f and terminal voltage of a cell.
An electric current flowing in a wire creates ______ around the wire.
A current of 0.3 A is flowing through a branch of 6 Ω resistors in a junction as shown in fig. . Calculate the
(a) P.d. across the junction XY,
(b) Current flowing through 9Ω and 24Ω
( c) P.d. across 24 Ω resistor, and
( d) e.m.f. of the cell.
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
