Voltage and Current Measurement in Parallel Combination
10-VOLTAGE AND CURRENT MEASUREMENT IN PARALLEL COMBINATION
Aim:
To study its circuit relation,
- Current relation
- Voltage relation
- Value of resistance in the circuit.
APPARATUS REQUIRED:
| Sl no | Name of Apparatus | Type | Specification | Qty |
| 1 | Voltmeter | |||
| 2 | Ammeter | |||
| 3 | Rheostat | |||
| 4 | Lamp |
THEORY:
- In parallel circuit, sum of the branch current is equal to the total current.
- Voltage across each resistance is same in the entire element in the circuit.
- Total resistance decreases with increased number of resistance in parallel and hence current also increases.
- Circuit is not interrupted if there is any interruption in the branch.
PROCEDURE:
- Connect the accessories as per the diagram.
- Close the circuit and note the readings of voltmeter across each lamp and the supply voltage, also note the current.
- Repeat the experiment by changing wattage of each bulb.
- Tabulate the readings.
CIRCUIT DIAGRAM
TABULAR COLUMN
| Sl no. | L1 | L2 | L3 | V | I | I1 | I2 | I3 | Total I= I1+I2+I3 | R1=V/I1 | R2=V/I2 | R3=V/I3 | R=V/I | Total resistance R=R1+R2+R3 |
RESULT:
The given circuit is set up and current across each resistance and voltage is measured.
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