A 35 ? lamp and a 90 ? lamp are connected in series and placed across a potential of 40 V.
a). What is the equivalent resistance of the circuit?
Answer in units of ?
b). What is the current in the circuit?
Answer in units of A
c). What is the voltage drop across the first lamp?
Answer in units of V
d). What is the power dissipated in the first lamp?
Answer in units of W