Correct Answer:- Option-B

Question29:-The sag correction for chain line will be when ` ४४` is the weight of the chain, "L’ is the span and 7 ௩௬௦
tension or pull

2402 / 212+ لديم
م24 0/210 :8
7248-2 2
‎೧;-:೪/72072 (2487‏
‎Correct Answer:- Option-C‏
‎Question30:-Natural error in levelling is caused due to‏
‎A:-Wind vibration‏
‎B:-Atmospheric refraction‏
‎C:-Temperature variation‏
‎D:-All the above‏
‎Correct Answer:- Option-D‏
‎Question31:-Find the time taken for a sinusoidal altemating current of maximum value 20A to reach 15A for the first time,‏
‎after being instantaneously zero, the supply frequency being 40 Hz‏
‎A:-2.35 ms‏
‎B:-3.37 ms‏
‎C:-4.44 ms‏
‎D:-1.23 ms‏
‎Correct Answer:- Option-B‏

Question32:-The voltage across a 20 pF capacitor is given by ௨10.75-1.58“(-10001)-0.756” (20001) .
What is the current through the capacitance.

03(e~{-1000 t}-~{-2000 t}}"
B:-"0.3(e~ {-1000t} -2~ {-2000t})"
C:-*3(e™{-1000t}-e~ {-2000t})"
D:-*0.003{e”{-1000t}-e" {-2000t})"
Correct Answer:- Option-A

Question33:-Two coils having equal resistance but different inductances are connected in series. The time constant of the
series combination is

A:-Sum of the time constant of individual coils

B:-Average of the time constant of individual coils
C:-Geometrical mean of the time constant of individual coils
D:-Product of the time constant of individual coils

Correct Answer:- Option-B

Question34:-A network contains linear resistor and ideal voltage sources. If value of all the resistors are doubled, then
voltage across each resistor is

A:-Halved

B:-Doubled

C:-Not changed

D:-Increase 4 times

Correct Answer:- Option-C
Question35:-The current i(t) through a 10 ohm resistance in series with an inductance is given by i{t) = 3 + 4 sin (100t +
45°) + 4 sin (300t + 60°)A. The rms value of cumrent and power dissipated in the circuit are

A:-sqrt(41) A, 410 W respectively

B:-'sqrt(35)°A, 380 W respectively

C:-5 A, 250 W respectively

D:-11 A, 1210 W respectively

Correct Answer:- Option-C
Question36:-In full wave rectificati

A:-50 Hz

B:-75 Hz

C:-100 Hz

D:-200 Hz

Correct Answer:- Option-C

Question37:-A fully charged 12 V, 100 Ah battery is connected to a 1.2 Q load. The expected time for which the battery ೧೩೧
supply power to load is

A:-10 hours
B:-12 hours
C:-1.2 hours

if the input frequency is 50 Hz, then the output frequency will be