A series LR circuit consists of a battery, resistor, inductor and a switch. When the switch is closed the circuit has a time constant of 8.0 s. If the resistance and inductance of the circuit are both doubled, what is the resulting time constant?
A) 8.0 s
B) 16 s
C) 32 s
D) 4.0 s
E) 2.0 s

Question

A series LR circuit consists of a battery, resistor, inductor and a switch. When the switch is closed the circuit has a time constant of 8.0 s. If the resistance and inductance of the circuit are both doubled, what is the resulting time constant? 
A) 8.0 s 
B) 16 s 
C) 32 s 
D) 4.0 s 
E) 2.0 s

Quizplus · Accepted Answer

The Answer of A series LR circuit consists of a battery, resistor, inductor and a switch. When the switch is closed the circuit has a time constant of 8.0 s. If the resistance and inductance of the circuit are both doubled, what is the resulting time constant? 
A) 8.0 s 
B) 16 s 
C) 32 s 
D) 4.0 s 
E) 2.0 s

A Series LR Circuit Consists of a Battery, Resistor, Inductor