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- The duty ratio of a step-up chopper with an output voltage of 200 V from a 80 V dc source, is
- When The dc converter in figure shown has a resistance load of R = 10 Ω and the input voltage is Vs 220 V the converter switch remains on, its voltage drop is Vo -2 V. The chopping frequency is fI K sW Vs If the duty cycle is 50%, determine: (a) the average output voltage V (b) the RMS output voltage Vo (c) the converter efficiency (d) the effective input resistance of the converter
- When the SCR conducts, the forward voltage drop will (a) 0.7 V at all load current (b) 2 to 2.5 V at all load...
- A battery of 40 V and three capacitors of 1000 μF, 500 μF and 100 μF are all connected in
- How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
- For a battery with constant voltage, the reflection coefficient is
- An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak
- A string of five resistors connected in series is connected across a 6 V battery. Zero voltage is measured...
- To Charge a 120 V battery from a 600 V DC source using a DC chopper, The average battery current should...
- The emf induced in a coil is 1 volt when current in it changes from 0 to 100 mA in time 10mS. Its inductance...
- A supply of 24 V DC is applied across a circuit which consist of three resistors connected in parallel R1= 1.2KΩ, R2= 560 Ω, R3= 2.1Ω and a fourth resistor of 7.8 Ω connected in series with the parallel group. Determine the current, voltage and power across each resistor
- A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current
- when voltage drops what happens to current?
- A single phase transformer is designed to operate from 50 Hz, 1100 V supply and to have an output voltage
- A ramp voltage V(t)=100 V is applied to an RC differentiating circuit with R=5 kΩ and C=4 μF. The maximum...
- In a battery, the difference between the no-load voltage and the measured voltage output is called ________
- Ripple in output current of a step-down chopper feeding RLE load is maximum, when duty cycle is equal to:
- When 7/0.029 V.I.R cable is carrying 20 A, a drop of 1 V occurs every 12 m. The voltage drop in a 100 m run of...
- When the voltage across a battery is measured using a D.C potentiometer, the reading shows 1.08 V. But
- For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is
- The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The
- For an 8 bit DAC, reference voltage is 10 V. If input to DAC starting from MSB is 10111100, output (in volts) is ...
- The power supply whose output voltage varies with variation in input voltage or output load current is known as
- "Maximum power output is obtained from a network when the load resistance...
- A dc voltmeter has a sensitivity of 1000 Ohm/V. When it measures half full scale in 100 V range, the current ...
- What is the value of Inductance of a coil that induces 20 V when the current through the coil changes from...
- If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be?
- The zero sequence current of a generator for line to ground fault is j 2.4 p.u. The current through the neutral
- A BJT’s voltage stand-off capability when the base current is zero
- A 120 Ah capacity battery can deliver a current of 8A for a period of
- If an energy meter disc makes 10 revolutions in 100 seconds when a load of 450W is connected to it, the...
- A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s.
- Consider the circuit in Fig. 2 with the following data: VBE=0.6V; Vz=6.6V; Re=2K ohm; Vcc=15V; assume IB <<IC. What is the role of R1 resistor? Calculate the current IC through the collector resistor (RC): what can be the variation range of the load resistance Re for the current Ic to remain constant.
- A series is given with one term missing. Select the correct alternative from the.given ones that will complete the series. FC, DA, BY, ZW, ? Options: 1) YU 2) XU 3) V 4) XV
- The terminal voltage of a DC shunt generator drops on load because of all of the following
- What happens to the angle between current and voltage, when a small capacitance is added in series with...
- When there is 12 mA of current through a 1.2 k ohms resistor, the voltage across the resistor is?
- What is the capacitance when a capacitor passes a current of 31.43 mA when supplied with 40 V AC with a
- The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc
- Recommended IiL (minimum input current when the input voltage represents logical zero) is minimum for ...
- What is the output voltage of a battery if 12 J of energy is expended in moving 1 C of charge?
- What is the output voltage of a battery if 6 J of energy is expended in moving 1 C of charge?
- What is the output voltage of a battery if 10 J of energy is expended in moving 1.25 C of charge?
- A 200 V dc motor takes a field current of 2 A to generate a back emf of 180 V. If the field winding resistance is
- The current in a 200 mH coil increases from 2 to 5 A in 0.1 Second. What is rate of change of current?
- A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.
- The output power of a filter is 100 mW, when the signal frequency is 6 kHz. When the frequency is increased...
- A digital voltmeter has a read-out range from 0 to 9999 counts. When full scale reading is 9.999 V, the
- An AC supply of 230 V is applied to half wave rectifier circuit. A transformer turns ratio is 20 : 1. Find i) Output DC voltage (ii) Peak Inverse Voltage (PIV)
- Unit to measure capacity of battery is