A. Negative resistance characteristics

B. Goes into avalanche condition

C. Voltage drop snaps back**D. All of these**

# Category: Electronics

A. TRIAC

B. SCR

C. GTO**D. Only (a) and (b)**

A. Equal to the input frequency

B. Twice the input frequency

C. Three times the input frequency**D. Six times the input frequency**

A. Phase current

B. Three times the phase current

C. Three times the line current**D. Zero at all times**

A. Symmetric triangular voltage across itself

B. Symmetric rectangular voltage across itself**C. Symmetric trapezoidal voltage across itself**

D. Symmetric sinusoidal voltage across itself

## What is an ideal Diode?

A. Unidirectional

B. Bidirectional

C. Fixed voltage polarity**D. Only (a) and (c)**

A. Sine wave**B. Square wave**

C. Saw – tooth wave

D. Trapezoidal wave

A. Uninterruptible power supplies

B. Induction heating system

C. Constant voltage and frequency power supplies**D. All of these**

**A. There is always a path for the DC current independent of the AC line**

B. There is always a path for the AC current independent of the ac line

C. There is always a path for the DC current dependent of the ac line

D. There is always a path for the AC current independent of the ac line

A. Current sensor across IGBT

B. Voltage sensor across IGBT**C. Current sensor in series with IGBT**

D. Voltage sensor in series with IGBT