What is Ohms law
Verify experimentally
Answers
Explanation:
To verify Ohm's law, we need to measure voltage across the test resistance RT and current passing through it. The voltage can be measured by connecting high resistance R1 in series with galvanometer. This combination becomes a voltmeter and shall be connected in parallel to RT .
Ohm's law states that Current through a conductor is directly proportional to voltage difference across it. where V is the voltage, I is the current and R is the resistance. The circuit diagram to verify ohm's law is drawn below. Voltmeter across a resistor is connected in parallel
In a circuit ammeter is always connected in series and voltmeter is always connected in parallel. So the option A is the correct setups for verifying Ohm's law.
Explanation:
OHM'S LAW - LAW
According to Ohm's Law, the current flowing in a conductor is directly proportional to the potential difference across its ends provided the physical conditions and temperature of conductor remains constant.
I∝V
V=IR
VERIFYING OHM'S LAW -
EXAMPLE
Let resistance used for verification be R. Make a circuit of R, voltmeter and ammeter measuring voltage and current through R, rheostat (variable resistor), and a cell. Connect the components properly. Note down values of voltage and current shown by voltmeter and ammeter. Repeat the above for different values of Rheostat. Record data in a tabular format and calculate V/I for each case. Its should be approximately same. Plot V v/s I on a graph paper. A straight line is obtained whose slope equals resistance.