Two fixed type resistors, 4 ohms and 7.5 ohms, are connected in parallel. + 12 volts 4 2 7.50

6. An electrical circuit is shown below. The battery supplies 15 V. The resistances have the following values:   R₁= 30 Ω, R₂ = 40 Ω, R3 = 20 Ω .   (a) Calculate the replacement resistance of the three resistors.     (b) Calculate the total current through the circuit, and the current through the respective resistor     (c) If the lower right corner is grounded, then calculate the potentials at points A and B.   (d) If the current is interrupted at point C, what will be the potentials at A and B.

The circuit below contains two real batteries, each having significant internal resistance. Battery #1 has an EMF of 6.00 V and an internal resistance of 1.00 ohm. Battery #2 has an EMF of 12.00 V and an internal resistance of 2.00 ohms. These two batteries are connected in series with two resistors R, = 6.00 ohms and R,= 3.00 ohms. ri d (6.00,V) (1.00 0) R1 (6.00 N) R2 (3.00 N) a r2 E2 (2.00 Q) (12.00 V) 18. The current in the 12.00 Volt battery is equal to C. 0.500 A. A. 0.750 A. B. 1.00 A. D. 2.00 A. E. 1.50 A. 19. The potential difference across the terminals of battery #1 from point C to point d is equal to C. 7.00 V. A. 5.50 V. B. 6.00 V. D. 5.00 V. E. 6.50 V. 20. The potential difference across the terminals of battery #2 from point a to point b is equal to C. 13.00 V. A. 14.00 V. В. 10.00 V. D. 11.0 V. E. 12.00 V.