Remarks (1)The current thru a resistor is a the voltage across (2)A resistor satisfying this law is said to be linear 3 The current and voltage are measured as in fig. 5-4 The current thru a voltmeter is usually assumed to be negligible compares with that thru R R Figure 5.4 Measurement of the current I through a resistor R, and of the voltage across it. a circle marked I represents an ammeter, and a circle marked V,a voltmeter