A PNPN device having two gates is:
A. Diac
B. Triac
C. SUS
D. BCS
A silicon controlled racitifier (SCR) is a:
A. Unijunction device
B. Device with three junction
C. Device with four junction
D. None of the above
A thyristor equivalent of a thyratron tube is a:
A. Diac
B. Triac
C. Silicon controlled-rectifier SCR
D. None of above
A Triac is a:
A. 2 terminal switch
B. 2 terminal bilateral switch
C. 3 terminal bilateral switch
D. 3 terminal bidirectional switch
Which of the following quantities consists of SI unit as WATT:
A. Force
B. Charge
C. Current
D. Power
Which of the following has no units:
A. Permeability
B. Moment of a magnet
C. Magnetic susceptibility
D. Permittivity
Which quantity consists of a unit 1KWh:
A. Energy
B. Time
C. Power
D. Charge
Which quantity should be measured by the voltmeter:
A. Current
B. Voltage
C. Power
D. Speed
Internal resistance of ideal current source is:
A. zero
B. infinite
C. finite
D. 100 ohms
Capacitor does not allow the sudden change of:
A. current
B. voltage
C. power
D. None of the above
