The Voltage and Power Ratings of a Particular Light Bulb,which

question 46

Multiple Choice

The voltage and power ratings of a particular light bulb,which are its normal operating values,are 110 V and 60 W.Assume the resistance of the filament of the bulb is constant and is independent of operating conditions.If the light bulb is operated at a reduced voltage and the power drawn by the bulb is 36 W,what is the operating voltage of the bulb?

• A) 66 V
• B) 72 V
• C) 78 V
• D) 85 V
• E) 90 V

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Definitions:

Incentive Function

The inducement that an increase in the price of a commodity gives to sellers to make more of it available (and conversely for a decrease in price), and the inducement that an increase in price offers to buyers to purchase smaller quantities (and conversely for a decrease in price).

Rental Payments

Rental payments are periodic payments made by a tenant to an owner for the use of property, such as for housing or commercial space.

Productive Efficiency

The production of a good in the least costly way; occurs when production takes place at the output at which average total cost is a minimum and marginal product per dollar’s worth of input is the same for all inputs.

Production Cost

The total expenses incurred in the process of producing or manufacturing goods, including materials, labor, and overhead costs.