Advertisements
Advertisements
प्रश्न
How will you infer with the help of an experiment that the same current flows through every part of the circuit containing three resistors R1, R2 and R3 in series connected to a battery of V volts?
Advertisements
उत्तर
Consider the given circuit in which a series combination of three resistors of resistances R1, R2 and R3 are shown to be connected to a battery of V volts. An ammeter is also shown to be connected in the circuit. It can be inferred that the current remains the same in the circuit by placing the ammeter at different points in the same circuit i.e. At any point just after R1, R2, and R3. It is observed that the value of the current observed in the ammeter comes to be the same.
APPEARS IN
संबंधित प्रश्न
What is (a) the highest, (b) the lowest total resistance that can be secured by combinations of four coils of resistance 4 Ω, 8 Ω, 12 Ω, 24 Ω?
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be:
Why are alloys commonly used in electrical heating devices? Give reason.
Which has less electrical resistance : a thin wire or a thick wire (of the same length and same material)?
What do you understand by the "resistivity" of a substance?
A wire is 1.0 m long, 0.2 mm in diameter and has a resistance of 10 Ω. Calculate the resistivity of its material?
What would be the effect on the resistance of a metal wire of:
increasing its temperature?
The figure blow shows a variable resistor in a dimmer switch.
How would you turn the switch to make the lights: (a) brighter, and (b) dimmer? Explain your answer.
Resistance of a metal wire of length 5 m is 100 Ω . If the area of cross - section of the wire is `3 × 10^-7 "m"^2` , Calculate the resistivity of the metal .
The effective resistance between A and B is:
