Advertisements
Advertisements
प्रश्न
Study the following circuit and find out:
(i) Current in 12 Ω resistor.
(ii) The difference in the readings of A1 and A2, if any.

Advertisements
उत्तर

Firstly calculating the equivalent resistance in the circuit.
`"R"_"eq" =( 24xx24)/(24+24)+12=24Ω`
(i) The current through the 12 Ω resistor is given by:
`"I" = 6/24=1/4 "A"`
APPEARS IN
संबंधित प्रश्न
Which instrument is used to measure electric current? How should it be connected in a circuit?
In which of the following cases more electrical energy is consumed per hour?
(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms.
Name two devices which work on the heating effect of electric current.
The following table shows the current in Amperes and potential differences in Volts.
- Find the average resistance.
- What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
- Which law will the graph prove? Explain the law.
| V (volts) | I (amp) |
| 4 | 9 |
| 5 | 11.25 |
| 6 | 13.5 |
A bulb marked 12 V, 24 W operates on a 12 volt car battery for 20 minutes. Calculate:
(i) The current flowing through it, and
(ii) The energy liberated.
Complete the following table. The first answer has been given as an example.
| Quantity | Unit | |
| (a) | Electrical potential | volt |
| (b) | Resistance | ........ |
| (c) | Power | ........ |
| (d) | Energy | ........ |
| (e) | Resistivity | ........ |
How is direction of current related to the direction of flow of electrons?
State the conditions for the flow of charge in a circuit from one point to the other.
