Physics MCQs

1.     A choke is used as resistance in

a)     DC circuit

b)    AC circuit

c)     Both DC and AC circuit

d)    Full wave rectifier circuit

2.     At resonance the value of the power factor in an L-C-R series circuit is

a)     Zero

b)    ½

c)     1

d)    Depends upon the value of current

3.     An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is

a)     1 Ω

b)    5 Ω

c)     7 Ω

d)    10 Ω

1.b

2.c

3.B