Advertisements
Advertisements
प्रश्न
In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a 12 V battery will be
 |
 |
 |
| (i) | (ii) | (iii) |
पर्याय
same in all the cases
minimum in case (i)
maximum in case (ii)
maximum in case (iii)
Advertisements
उत्तर
maximum in case (iii)
Explanation -
Heat produced in time (t) is given by
Heat (H) = `"V"^2/"R" xx "t"`
where, V = potential difference
R = Net resistance of the circuit
t = time
`"R"_(1"net") = 2Ω`
`"R"_(2"net") = 2Ω + 2Ω = 4Ω`
`"R"_(3"net") = (2xx2)/(2+2) = 1Ω`
Since, R3net is minimum so heat produced will be maximum in case (iii).
APPEARS IN
संबंधित प्रश्न
What do the following symbols mean in circuit diagrams?
Draw circuit symbols for variable resistance
What is a circuit diagram
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
Two tungsten bulbs of power 50 W and 60 W work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor?
In an electric circuit, electron flow a from of point of ______ potential to the point of ______ potential.
Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances.
Explain the following:
Closed circuit
If you touch an electric wire carrying current you get a shock, but if on the same wire the birds sit they do not get any shock/current. Explain why?
What is the potential difference?
Flow of electricity through a closed circuit is _____.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
In a simple circuit, why does the bulb glow when you close the switch?
The rate of flow of electric charges in a circuit is called ______.
In a circuit, if the key is in open (off) condition, then electricity will not flow.
When an electric current flows through a copper wire AB as shown in the following figure, the wire
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
Paheli is running short of connecting wires. To complete an electric circuit, she may use a ______.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
