2. To forward-bias a diode, a. an external voltage is applied that is positive at the anode and negative at the cathode b. an external voltage is applied that is negative at the anode and positive at the cathode c. an external voltage is applied that is positive at the p region and negative at the n region d. answers (a) and (c) 3. When a diode is forward-biased, a. the only current is hole current b. the only current is electron current c. the only current is produced by majority carriers d. the current is produced by both holes and electrons 4. Although current is blocked in reverse bias, a. there is some current due to majority carriers b. there is a very small current due to minority carriers c. there is an avalanche current