10.

11.

12.

13.

14.

15.

In order to produce a flux of 100 “Wb in an airgap of length 0.2 mm and area of cross-
section is 1 cm2, the MMF required is :
(ಯ. 500/7 (B) 5007

(C) 2507 (0) 250/7

A ring-shaped coil with fixed number of turns of it carries a current of certain magnitude. If
an iron core is threaded into the coil without any change in coil dimensions, the magnetic
induction density will :

(A) Remain unaffected (B) Reduce
(C) Unpredictable ൯) Increase

What is the main difference between first order LPF and second order LPF?
(A) Second order LPF has High cut off frequency
(B)_ Second order LPF has Low cut off frequency
(C) Lower voltage gain

(D) Higher voltage gain

If the voltage and current in an AC circuit are given by v=200sin(@t+30) and

i =10sin(@t-60) then power factor of the circuit is :
(ಸ) 0.707 (B) 0
(© 0.5 (D) 0.866

The electric field inside a perfectly conducting media is :
(A) Infinite (B) Zero
(C) Dependent upon the value of charge (D) None of the above

Two point charges Q, =1 nC and @, =2 nC are at a distance apart. Which of the following
is incorrect?

(ಯ) The force on Q, is repulsive

(B) The force on Q, is along the line joining them

(C) The force on Q, is the same in magnitude as that on Q,

(D) As the distance between them decreases, the force on Q, increases linearly

Two identical co-axial circular coils carry same current I but in opposite direction. The
magnitude of magnetic fieldB at a point on the axis midway between the coils is :

(A) Zero (B) Same as that produced by one coil
(C) Twice that produced by one coil (D) Half that produced by one coil
5 080/2023

[P.T.0.]