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प्रश्न
The unit for measuring potential difference is:
विकल्प
watt
watt
ohm
ohm
volt
volt
kWh
kWh
उत्तर
volt
It is the SI unit of potential difference.
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संबंधित प्रश्न
State whether the resistivity of a wire changes with the change in the thickness of the wire.
How much work is done in moving a charge of 2 C across two points having a potential difference of 12 V?
Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
What is the ratio of potential difference and current known as?
A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. Wire p.d. is needed to make a current of 250 mA flow through the same wire?
If the potential difference between the end of a wire of fixed resistance is doubled, by how much does the electric power increase?
If the potential difference between the ends of a fixed resistor is halved, the electric power will become:
Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement.
Calculate:
(i) the total resistance in the circuit
(ii) the total current flowing in the circuit.
The figure shows a circuit. When the circuit is switched on, the ammeter reads 0.5 A.
(i) Calculate the value of the unknown resistor R.
(ii) Calculate the charge passing through the 3 Ω resistor in 120 s.
(iii) Calculate the power dissipated in the 3 Ω resistor.
If P and V are the power and potential of device, the power consumed with a supply potential V1 is:
