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प्रश्न
The device used for measuring potential difference is known as:
विकल्प
potentiometer
ammeter
galvanometer
voltmeter
उत्तर
voltmeter
It is connected in parallel across the points where the potential difference is to be measured.
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संबंधित प्रश्न
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:
| I (amperes) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volts) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Plot a graph between V and I and calculate the resistance of that resistor.
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
Define the term ‘volt’.
State whether the potential is a scalar or vector?
Find the resistance of a conductor if the electric current flowing through it is 0.35 A when the potential difference across it is 1.4 V.
An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres `(σ_1//σ_2 )` is ______.
Twenty-seven drops of the same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
Find the potential difference required to flow a current of 300 mA in a wire of resistance 20 Ω.
