What term describes the rate at which charge passes a point in a circuit

Which of the following best describes the circuit shown below?

Unlike the idealized voltmeter, a real voltmeter has a resistance that is not infinitely large. a voltmeter with resistance rv is connected across the terminals of a battery of emf e and internal resistance r. find the potential difference vmeter measured by the voltmeter. what is vmeter?

Name three simple machine found in a ferris wheel