A simple voltmeter with a full-scale reading of 50(V) is required. Use a d'Arsonval movement with a rating of 20(mV) at 1 (mA). Calculate the value of the voltmeter resistor, Rv, required to achieve these design specifications. a.) Rv = 20ohms b.) Rv= 75 ohms c.) Rv = 49,980 ohms d.) Rv = 26, 377 ohms