A Resistor of 2 Ω and Another of 3 Ω

question 13

Multiple Choice

A resistor of 2 Ω and another of 3 Ω are connected in parallel, and this combination is joined in series with a 4-Ω resistor across a battery. If the current in the 2-Ω resistor is 2.0 A, the potential drop across the 3-Ω resistor is

• A) 2.4 V.
• B) 1.2 V.
• C) 6.0 V.
• D) 4.0 V.
• E) 8.0 V.

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Definitions:

Second Messenger

Intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules.

Thyroxine

A hormone produced by the thyroid gland that regulates metabolism, energy generation, and growth and development.

FSH and LH

Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH) are gonadotropins secreted by the pituitary gland, involved in the regulation of reproductive processes including the menstrual cycle and spermatogenesis.

Norepinephrine

Neurotransmitter of the postganglionic fibers in the sympathetic division of the autonomic system; also, a hormone produced by the adrenal medulla. Sometimes referred to as noradrenaline.