1) A choke is used for resistance in _

Explanation

Answer: b. ac circuitExplanation: A choke is an inductor that is primarily used to provide impedance to alternating current (ac) in a circuit. It resists changes in current flow and is commonly employed in ac circuits to control the flow of current at different frequencies.Incorrect options:a. dc circuit - Chokes are not typically used for resistance in direct current (dc) circuits. They are more relevant in ac circuits due to their inductive properties.c. both ac and dc - While chokes can be used in both ac and dc circuits, they are particularly associated with ac circuits for impedance purposes.d. full wave rectifier circuit - Chokes are not primarily used for resistance in full wave rectifier circuits. They are more commonly associated with filtering and smoothing in power supply circuits.