Which of the following statements is CORRECT?         

The relationship between electric field EE and potential VV is: A) E=dVdxE = \frac{dV}{dx}​B) E=−dVdxE = -\frac{dV}{dx}​C) E=V⋅dxE = V \cdot dxD) E=VxE = \frac{V}{x}​

Using Bookbinder Corporation’s financial statements (shown below) for 2022, answer the following questions. (20 points) Bookbinder Corporation: Income Statements for Year Ending December 31 (Millions of Dollars)   2022   2021 Sales $16,500   $15,000 Operating Costs Excluding depreciation 14,040   12,750 Depreciation and amortization 570   540 Earnings before interest and taxes $1,890   $1,710      Less interest 180   150 Pre-tax income $1,710   $1,560     Taxes (40%) 684   624 Net income available to common stockholders $1,026   $936 Common dividends $330   $300  Bookbinder Corporation: Balance Sheets as of December 31 (Millions of Dollars)   2022   2021 Assets       Cash $825   $750 Short-term investments 165   150 Accounts receivable 4,125   3,750 Inventories 2,475   2,250   Total current assets $7,590   $6,900   Net plant and equipment 5,775   5,250 Total assets $13,365   $12,150       Liabilities and Equity       Accounts payable $1,650   $1,500 Accruals 825   750 Notes payable 576   300 Total current liabilities $3,051   2,550 Long-term debt 1,650   1,500 Total liabilities $4,701   $4,050 Common stock 6,468   6,600 Retained earnings 2,196   1,500 Total common equity $8,664   $8,100   Total liabilities and equity $13,365   12,150 a. What is the firm’s current ratio? What is the firm’s quick ratio? b. What is the firm’s total assets turnover? c, What it the firm’s debt-to-assets ratio? d. What is the firm’s ROA? What is the firm’s ROE? e. What is the firm’s net profit margin? f. Construct the extended Du Pont equation for Bookbinder Corporation (need to find all three ratios which explain the change of ROE). Note: Please use the financial statements for 2022 to answer the questions above.  

A galvanometer is used to: A) Measure very small currentsB) Measure resistanceC) Measure voltage in a circuitD) Generate electric current

A voltmeter is used to measure: A) Electric currentB) Voltage across a componentC) Resistance of a componentD) Power of the circuit

If a current of 2 A flows through a resistor of 5 Ω, the potential difference across the resistor is: A) 10 VB) 5 VC) 2.5 VD) 1 V

The resistance of a conductor depends on: A) Its length and cross-sectional areaB) The temperature of the conductorC) The material of the conductorD) All of the above

Kirchhoff’s voltage law (KVL) states that: A) The current is proportional to the voltageB) The total voltage in a loop is equal to zeroC) The resistance is inversely proportional to the currentD) The power is conserved across all circuit elements

A voltmeter should always be connected: A) In series with the componentB) In parallel with the componentC) At the power sourceD) At the ground

A conductor has a resistance of 5 Ω5 \, \Omega, a length of 2 m2 \, \text{m}, and a cross-sectional area of 0.005 m20.005 \, \text{m}^2. Calculate its resistivity.