Figure 6.7 shows an electrical circuit scheme. An ammeter connected to this circuit shows
1.5 A, voltmeter — 6 V; R1 = 4 Ω, R3 = 8 Ω. Calculate the total resistance of the circuit. (R2 is not given)

Resistors in series have the same current flow, and their total resistance is equal to the sum of the individual resistances. According to Ohm's law, the voltage drop across a resistor is equal to the current times the resistance.

Ohm's law:

V = IR

6 V = (1.5 A) R

R = 4 Ω

The total resistance is:

R = R₁ + R₂ + R₃

R = 4 Ω + 4 Ω + 8 Ω

R = 16 Ω

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Figure 6.7 shows an electrical circuit scheme. An ammeter connected to this circuit shows1.5 A, voltmeter — 6 V; R1 = 4 Ω, R3 = 8 Ω. Calculate the total resistance of the circuit. (R2 is not given)​

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Figure 6.7 shows an electrical circuit scheme. An ammeter connected to this circuit shows
1.5 A, voltmeter — 6 V; R1 = 4 Ω, R3 = 8 Ω. Calculate the total resistance of the circuit. (R2 is not given)