Question

Match List I with List II

Column 1	Column 2
(a) Rectifier	(i) Used either for stepping up or stepping down the A.C. voltage
(b) Stabilizer	(ii) Used to convert A.C. voltage into D.C. voltage
(c) Transformer	(iii) Used to remove any ripple in the rectified output voltage
(d) Filter	(iv) Used for constant output voltage even when the input voltage or load current change

Answer 1

Part a:

1. Rectifier is an electronic device that is used in the conversion of alternating current into direct current.
2. P-N junction diodes are used in rectifiers.

Hence, (a) - (ii)

Part b:

1. Stabilizer detects voltage fluctuations in household appliances.
2. Due to voltage fluctuations appliances could get affected, so the stabilizer adjusts the input voltage internally and provides an output voltage in a compatible range.

Hence, (b) - (iv)

Part c:

1. Transformer is an electronic device that is used to transfer the electrical energy from one alternating circuit to other alternating circuit.
2. Transformer transforms electrical energy by increasing(stepping up) or decreasing(stepping down) the alternating voltage.

Hence, (c) - (i)

Part d:

1. Filter is a type of electrical circuit that removes the ac components present in rectified output voltage.
2. Filtering in a circuit provides the pure rectified dc output voltage.
3. It only allows the dc components in output voltage to reach the load.

Thus, (d) - (iII)

Hence, the correct answer is (a)-(ii), (b)- (iv), (c)-(i), (d)-(iii)