(A) Al-Qadir Trust Case
(B) Foreign Funding Case
(C) Park Lane Case
(D) None of the above
The ratio of number of turns of primary coil to secondary coil in a transformer is 1 : 2. If a cell of 1.5 volts is connected across primary coil, the emf across secondary coil is:
(A) 0.75 V
(B) 1.5 V
(C) 0 V
(D) 6 V
In a HWR the load resistance is 100 and input voltage is 250sin100 t .the value of RMS current is:
(A) 5/4 A
(B) 5/2 A
(C) 4/5A
(D) 2/5A
In a HWR if Time period of input AC is 50ms, ripple frequency of the output will be:
(A) 10Hz
(B) 20Hz
(C) 40Hz
(D) 50Hz
In a full-wave rectifier, the frequency of the input AC. voltage is 50 Hz. The frequency of the output voltage is:
(A) 25 Hz
(B) 50 Hz
(C) 100 Hz
(D) None of these
For a full-wave rectifier, the minimum number of diodes required is:
(A) 2
(B) 3
(C) 4
(D) 1
In half wave rectification, diode conducts for:
(A) Only positive half cycle of AC
(B) Only negative half cycle of AC
(C) Complete cycle of AC
(D) quarter cycle of AC
Circuit used to convert pulsating dc into constant dc is called:
(A) Rectifier
(B) Filter
(C) Inverter
(D) Converter