Correct Answer:- Option-A
Question19:-If ` 3 cos~ {-1}(x} + 2 sin~{-1}{x}={3pi}/2" , then the value of *x" ‏يا‎

&- (0/2)

B:-0

யங்‌!

5:-€113))/2)*

Correct Answer:- Option-B
Question20:-A straight line passes through "P(2, 3)" is such that its intercepts between the axes is bisected at *P". Then the
straight line is

‎नी‏ 2 + ر3 یھ

‏٭6ے پ+ ×2“ یھ

‎೧-24 3 ಪ 247

‎D 3x + 2y = 12°

‎Correct Answer:- Option-D
Question21:-An RLC series circuit has a resistance R of 20 Q and a current which lags behind the applied voltage by 45°. If
the voltage across the inductor is twice the voltage across capacitor, what is the value of inductive reactance?

‏0 -ھ

‎8:-20೧

‎0:-40೧

‎0:-60 0

‎Correct Answer:- Option-C
Question22:-Three currents "i_1, i_2, i_3" are approaching a node if *i_1 = 10sin{400t+60~0)A" and" i_2 = 10sin{400t -
6070)8 . 776೧ 137 15

‎ಹಿಂ
‎8:- (105) 4001} &`
C:-*(-10sin 400) &`

‎D:-* {-5sqrt(3)chi3cos400t)A™

‎Correct Answer:- Option-C
Question23:-A water boiler at home is switched on to the ac mains supplying power at 230 V/50 Hz. The frequency of
instantaneous power consumed by the boiler is

‎ക:-112
‎8:50 112
C:-150 Hz
D:-100 Hz
Correct Answer:- Option-D
Question24:-Which of the following statement with magnetic field is correct?
A:-The electric current always produces a magnetic field
B:-The electric current produces magnetic field only in presence of a coil
C:-The electric current produces magnetic field only in presence of iron core
D:-Only large current produces magnetic field
Correct Answer:- Option-A
Question25:-When a pure resistor R = 100 Q has an applied voltage’v = 200 sin314t". The average power in the 100 Q
resistoris ` `
‏-ھ‎ 9۷
B:-200 W
C:-400 W
D:-800 W
Correct Answer:- Option-B
Question26:-The red colour of brick is due to
A:-iron oxide
B:-magnesia
ടി
D:-alumina
Correct Answer:- Option-A
Question27:-Purest form of iron is
കണി ട്ട!
B:-cast iron
C:-high carbon steel
D:-wrought iron
Correct Answer:- Option-D

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