16.

17.

18.

19.

20.

21.

22.

28.

24.

Tn a moving iron instrument, the deflection torque, T, is:
{A) Directly proportional to square of current
(B) Inversely proportional to square of current
(C) Directly proportional to current
(D) Inversely proportional to current

Inductance affects the direct current (d.c.) flow :
(ಡಿ) only at the time of turning off (B) only at the time of turning on
(C) at the time of turning on and off (D) at all the time of operation

For a sine wave with peak value E,,,,, the average value is :

(A) 0.686 ಗ್ಮ್ಮೃ (8) 0.707 ಶ್ಲ,
(0 0434 ಸ್ಲ್ಮ, (D) 1.414 ‏و‎
‎‘The ratio of starting torque to full load torque is least in :
(A) DC series motor (B) DC shunt motor
(C) DC compound motor (D) None of the above

The iron core from an iron-cored coil is removed so that it becomes air-cored. The inductance
of the coil :

(ಗ) remains the same (B) becomes zero

(C) decreases (D) increases

The forbidden energy band gap for Germanium is :
(A) 0.12eV ൫ 0.32 eV
(© 0.73 6४ (D) 7.3 6४

When the reverse bias is applied to a junction diode :
(A) The minority carrier current is increased
(B) The majority carrier current is increased
(C) The potential barrier is lowered
(D) The potential barrier is increased.

In a full-wave rectifier which uses two ideal diodes, the approximate relationship are :

1 ள்‌
(८) ए ஜால. ‏ٹر یی ہے وت‎
[
രര നമി, (0) 7६० va, PIV =V,
3

A forward biased silicon diode when carrying 8 negligible current bas a voltage drop of
0.65 V. When the current through the diode is increased to 1A, it dissipates 500 mW.
‘The ON-resistance of the diode is :

(A) 0.325 9 (छ) 0.52

(0) 0.65 0 (0) 0.77 9

5 005/2016
12.7൨]