Question

1.In your Ohm's law lab if you let the current (I) in your circuit remain constant, what will happen to the voltage (V) if the resistance (R) is tripled?

2.If you connect a 10-Volt supply voltage across a parallel combination of two 10 Ohm resistors, what should be the ammeter reading connected in series with the voltage source?

3.When you check a 7-Amps reading on your multimeter connected in series with a 3 Ohm resistor, what will the voltmeter reading if the same meter is connected across the resistor?

Answer 1

(1) According to Ohm's Law;

If current remains constant,

Thus, if resistance trippled voltage should be three times the original voltage to maintain constant current in the circuit.

(B) Voltage of battery V = 10 Volts;

Resistance of resistors R1 = R2 = 10 ohm;

equivalent resistance (R);

Current supplied by battery;

(3) According to ohm's law;

V = IR;

V = 7 x 3