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प्रश्न
Three resistors are connected to a 6 V battery as shown in the figure given below:
Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.
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उत्तर
(i) `1/"R"_1 = 1/8 + 1/12`
`= (3 + 2)/24 = 5/24`
R1 = 4.8 ohm.
Total Resistance = 4.8 + 7.2 = 12 ohm
(ii) V = IR
6 = I × 12
I = 0.5 Amp.
(iii) V = IR
= 0.5 × 7.2
= 3.6 Volt.
संबंधित प्रश्न
How much energy is given to each coulomb of charge passing through a 6 V battery?
The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given below:
| V (volts) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| I (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.
State whether the resistivity of a wire changes with the change in the thickness of the wire.
The device used for measuring potential difference is known as:
For the circuit shown in the diagram below:
What is the value of:
(i) current through 6 Ω resistor?
(ii) potential difference across 12 Ω resistor?
In the circuit diagram given below, the current flowing across 5 ohm resistor is 1 amp. Find the current flowing through the other two resistors.
How does the resistance of a metallic wire depend on its temperature? Explain with reason.
Draw a graph of Potential difference (V) versus Current (I) for an ohmic resistor. How can you find the resistance of the resistor from this graph?
A boy records that 4000 joules of work are required to transfer 10 coulombs of charge between two points of a resistor of 50 Ω. The current passing through it is:
Find the potential difference required to flow a current of 300 mA in a wire of resistance 20 Ω.
