Advertisements
Advertisements
Question
A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?
Solution
Here,
Potential difference, V = 20 V
Resistance, R = 5 Ω
Substituting these values in Ohm's equation, V/I = R:
Current, I = V/R = 20/5 = 4 A
Thus, the current flowing in the circuit is 4 A.
APPEARS IN
RELATED QUESTIONS
How much work is done in moving a charge of 2 C across two points having a potential difference of 12 V?
State the relation between potential difference, work done and charge moved.
What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?
In the circuit shown below:
The potential difference across the 3 Ω resistor is:
The differences between the electrostatic potential of the positive end the negative end of an electric cell is the ______ of the cell.
Three electric cells of potential difference 1.5 V each have been connected as a battery. The potential differences of the battery will be ____________ V.
What would you suggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales when the circuit is open? No extra ammeter/voltmeter is available in the laboratory.
State Ohm’s law.
Inside a hollow charged spherical conductor, the potential ______
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.
