Question 21 The electromotive force (emf) has the same physical units as: O charge O magnetism O electric potential current Question 22 1 pts Given the circuit diagram below, which equation correctly represents the equation for Kirchoff's Loop rule if you take the loop in a counter-clockwise (CCW) direction? R Alternate description: A schematic of a single current loop with a battery on the left and a resistor on the right. The current going through the battery is pointing upwards while the current going through the resistor is pointing downwards. O -E - iR = 0 OE - iR = 0 OE+ iR = 0 O -E+ iR = 0