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प्रश्न
Define the following:
Coulomb
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उत्तर
One coulomb is the amount of electric charge transferred by a current of one ampere in one second.
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संबंधित प्रश्न
Name the physical quantity whose unit is "ohm".
The unit of electrical resistance is:
(a) ampere
(b) volt
(c) coulomb
(d) ohm
Keeping the p.d. constant, the resistance of a circuit is halved. The current will become:
(a) one-fourth
(b) four time
(c) half
(d) double
A metal sphere is kept on an insulting stands. A negatively charged rod is brought near it, then the sphere is earthed as shown. On removing the earthing, and taking the negatively charged rod away, what will be the nature of charge on the sphere? Give reason for your answer.
- Name and state the law which relates the potential difference and current in a conductor.
- What is the necessary condition for a conductor to obey the law named above in part (a) ?
The ratio of the potential difference to the current is known as ________.
Ohm’s law states the relationship between power and voltage.
A wire connected to a power supply of 230 V has power dissipation P1. Suppose the wire is cut into two equal pieces and connected parallel to the same power supply. In this case, power dissipation is P2. The ratio of `"P"_2/"P"_1` is
The unit of specific resistance is ____________.
Calculate the total resistance of the circuit and find the total current in the circuit.
