Advertisements
Advertisements
प्रश्न
In the figure given below, A, B and C are three ammeters. The ammeter B reads 0.5A. (All the ammeters have negligible resistance.)
Calculate:
(i) the readings in the ammeters A and C.
(ii) the total resistance of the circuit.
Advertisements
उत्तर
(i) P.d. across 6 Ω = P. d. across 3 Ω
Or 6 × 0.5 = 3 × ic
Or ic i.e., current passing through the ammeter C is:
`(6 xx 0.5)/3 = 1.0`ampere
(ii) Here, `1/"R" = 1/6 + 1/3 = 3/6 = 1/2`
or R = 2 Ω
∴ Total ressistance of the circuit = 2Ω + R = 2Ω + 2Ω = 4Ω
∴ Current through A = Current passing through B + current passing through C
= 0.5 + 1.0 = 1.5 ampere
संबंधित प्रश्न
Potential difference is measured in _________ by using a ___________ placed in ___________ across a component.
Name a device that help to measure the potential difference across a conductor.
What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?
State whether a voltmeter has a high resistance of a low resistance. Give reason for your answer.
Calculate the power used in the 2 Ω resistor in each of the following circuits: a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
The following table shows current in Amperes and potential difference in Volts.
Which law will the graph prove? Explain the law.
Three resistors are connected to a 12 V battery as shown in the figure given below:
(i) What is the current through the 8 ohm resistor?
(ii) What is the potential difference across the parallel combination of 6 ohm and 12 ohm resistor?
(iii) What is the current through the 6 ohm resistor?
From the following observations taken while determining the resistance of a conductor, draw the current-voltage graph and calculate the resistance of conductor. Is the conductor ohmic?
| Ammeter reading I (in ampere) | Voltmeter reading V (in volt) |
| 0.2 | 0.4 |
| 0.3 | 0.6 |
| 0.5 | 1.0 |
| 0.8 | 1.6 |
| 1.5 | 3.0 |
A current of 0.2 A flows through a conducting wire for 5 minutes. How much charge will flow?
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance of 10m long wire of the same material but the double radius.
