Description : Is electron flow out from the positive or negative terminal of the voltage source?
Last Answer : Electrons flow from negative terminal of battery which is the area of higher density electrons to positive terminal of battery which is the area of lower density of electrons.
Description : In a simple series circuit, the entire source voltage will drop across ______________. A. the resistor next to the negative terminal B. a short circuit C. the resistor next to the positive terminal D. an open circuit
Last Answer : Answer: D
Description : If direction of current is from positive to negative, then it is called A. electronic current B. conventional current only C. positronic current D. protonic current
Last Answer : conventional current only
Description : The conventional current is due to the flow of a. atoms and molecules b. positive charges c. negative charges d. both b and c
Last Answer : b. positive charges
Description : Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.
Last Answer : Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.
Description : In cell, the current flows in outer circuit from a. Positive terminal to negative terminal and electrons from negative terminal to positive terminal b. Positive terminal to negative ... terminal d. Negative terminal to positive terminal and electrons from positive terminal to negative terminal
Last Answer : a. Positive terminal to negative terminal and electrons from negative terminal to positive terminal
Description : An open shunt field in a direct current machine may be located by connecting the field circuit to an external power source, equal to the rated field voltage or less, and tested with a voltmeter from ... C. any suitable ground to any available line lead D. any field pole to each field coil lead
Last Answer : Answer: A
Description : If the load requirement consists of both positive and negative voltages, what technique is used in the voltage divider to supply the loads from a single voltage source?
Last Answer : The ground (reference point) is placed in the proper point in the voltage divider so that positive and negative voltages are supplied
Description : Batteries 'A' and 'B' shown in the illustration are 6 volts each and batteries 'C' and 'D' are 24 volts each. If 'A' were connected in series-opposing to 'C' and 'B' was similarly ... the top terminal C. 30 volts, negative at the bottom terminal D. 30 volts, positive at the bottom terminal
Description : Batteries 'A' and 'B' shown in the illustration are 6 volts each and batteries 'C' and 'D' are 24 volts each. If 'A' and 'B' were reconnected to be in series-opposing to 'C' and 'D' ... at the top terminal C. 30 volts, negative at the bottom terminal D. 30 volts, positive at the bottom terminal
Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal
Last Answer : C. ground
Description : If the electricity represented by the wave form in 'B' were applied to the left side of the illustrated circuit, the output on the right side would be ____________. EL-0064 A. direct current with the ... lower lead D. clipped to a value equal to the square root of 3 times the input voltage value
Last Answer : Answer: C
Description : A lead-acid battery is considered fully charged when the ______________. A. electrolyte gasses freely B. battery charger ammeter indicates a positive reading C. terminal voltage reaches a constant value at a ... cells reaches the correct value and no longer increases over a period of 1 to 4 hours
Description : To neglect a current source, the terminal across the sources are: (1) Open circuited (2) Short-circuited (3) Replaced by some resistance (4) Replaced by capacitance
Last Answer : To neglect a current source, the terminal across the sources are: Open circuited.
Description : Direction of conventional current is A. direction of neutron flow B. direction of electron flow C. direction of flow of positive charge D. same as that of electric current
Last Answer : direction of flow of positive charge
Description : The internal rate of return is the discount rate for which the NPV is a) positive b) zero c) negative d) less than 1
Last Answer : b) zero
Description : A crow bar is a power supply circuit that provides A) Conventional current limiting B) Foldback current. limiting C) Temperature control D) Voltage limiting.
Last Answer : D) Voltage limiting.
Description : As shown in the illustration, the circuit has been on the line for several days when component 'E1' burns out. The operator receives an alarm, switches over 'B' to energize the standby ... than required for the circuit therefore limiting the current through the alarm relay which will not pick up
Description : Which of the following statements regarding cash flow patterns (for time periods 0, 1, 2, 3, and 4) is correct? A. The sequence of -Rs.100, Rs.50, Rs.40, Rs.60, and Rs.50 is a non-conventional cash ... -Rs.50, Rs.50, Rs.70, Rs.60, and -Rs.150 potentially has at most two internal rates of return.
Last Answer : B. The sequence of -Rs.100, Rs.600, -Rs.1,100, Rs.600, and Rs.20 potentially has a maximum of two internal rates of return.
Description : In the circuit shown in Fig. 4.63, the terminal voltage of the battery is 6.0 V. Find the current I through the `18 Omega` resistor.
Last Answer : In the circuit shown in Fig. 4.63, the terminal voltage of the battery is 6.0 V. Find the current I through the `18 Omega` resistor.
Description : The simplest method of controlling the terminal voltage of compound-wound DC generator is with a _____________. A. hand-operated field rheostat connected in series with the shunt field circuit B. ... in series with the load D. balance coil diverting neutral current through the shunt field
Description : Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission
Last Answer : (a) Increase of short-circuit current of the system
Description : A dc shunt generator has a speed of 800 rpm when delivering 20 A to the load at the terminal voltage of 220V. If the same machine is run as a motor it takes a line current of 20A from 220V supply. The speed of ... . (B) more than 800 rpm. (C) less than 800 rpm. (D) both higher or lower than 800 rpm.
Last Answer : (C) less than 800 rpm.
Description : A three-phase synchronous motor has a terminal voltage of 460 V and a terminal current of 120 A at a power factor of 0.95 lagging, synchronous reactance of 1.68 ohm and the field current is 47 A. The field to armature mutual ... _____________. (a). 20mH (b). 16mH (c). 24mH (d). 22mH
Last Answer : 22
Description : What is the calculated voltage at the positive and negative terminals of the battery shown in the illustration if each cell has a voltage of 1.5 volts? EL-0034 A. 1.5 volts B. 3.0 volts C. 6.0 volts D. 12.0 volts
Description : An open occurring within the field rheostat of an AC generator can be detected by short circuiting its terminals and observing a ____________. A. negative deflection of the wattmeter pointer B. ... of the wattmeter pointer C. buildup of alternator voltage D. low, but constant alternator voltage
Description : In the illustration, the function generators will accept only a signal of a given polarity, if negative is used for ahead and positive for astern, moving the bridge reference in the direction ... cause a speed change until the output voltage exceeds the value of the lube oil pressure override
Description : What is the polarity of voltage at point 'Z' in the circuit shown in the illustration? EL-0085 A. It will always be positive. B. It will always be negative. C. It depends on the instantaneous polarity at point 'W'. D. It cannot be determined without a voltmeter.
Description : What you mean by positive sequence, negative sequence and zero sequence of voltage?
Last Answer : Positive phase sequence A system of vectors is said to have positive sequence if they are all of equal magnitude and are displaced by 120° with same time interval to arrive at fixed axis of reference ... in all the 3- phases. Such phase sequence is zero phase sequence.
Description : If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?
Last Answer : SET state.
Description : Differentiate between positive and negative feedback on the basis of . (i) overall phase shift (ii) voltage gain (iii) stability (iv) applications
Last Answer : Compare positive feedback and negative feedback on the basis of: (i) Gain (ii) Bandwidth (iii) Phase shift (iv) Stability
Description : What does the positive and negative symbols represent in energy source?
Last Answer : Relative charge. (And/or relative voltage.)
Description : Why the emf of a cell is always greater than its terminal voltage? Explain the same.
Last Answer : Every practical source offers some opposition to the current due to its internal parts or components. Such a resistance of internal parts of source is called internal resistance of source. When source delivers ... less than emf induced. So, emf of a cell is always greater than terminal voltage.
Description : What is internal voltage drop and terminal voltage?
Last Answer : It is not permissible to just connect the positive terminal to the negative terminal of a cell with a copper wire. It will overheat and get damaged. This happens because the electromotive force (emf) ... than the nominal voltage (emf) of the cell and this lower voltage is called terminal voltage.
Description : Is it true or false that electron flow and conventional current are in opposite directions?
Last Answer : It is true because historically our field theory is developed through positive charges that is according to electro magnetic theory,but actual current flow is due to electrons only which can move freely where as positive charges bind to nuclear forces and can't move
Description : Explain the difference between electron flow and conventional current.
Last Answer : A motion of positive charges, in the opposite direction from electron fl ow, is considered conventional current.
Description : What is the direction of the conventional current flow?
Last Answer : The conventional current flow in opposite direction of flow of electrons. The electrons flow from negative terminal of battery to positive terminal of battery. And conventional current flow from positive terminal of battery to negative terminal of battery.
Description : Write the procedure of converting a given current source into voltage source.
Last Answer : Conversion of current source into equivalent voltage source: Let IS be the practical current source magnitude and ZI be the internal parallel impedance. VS be the equivalent practical voltage source magnitude and ZV be the internal series impedance of the voltage source.
Description : A current controlled voltage source is equivalent to : (A) series voltage feed -back amplifier (B) shunt current feed -back amplifier (C) shunt voltage feed -back amplifier (D) series current feed -back amplifier
Last Answer : A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier
Description : A network that consists of at least a voltage source or current source is called A) Active network B) Ideal network C) Sourced network D) Outsourced network
Last Answer : A network that consists of at least a voltage source or current source is called Active network
Description : A series R-L circuit is suddenly connected to d.c. voltage source of V volts. The current in this series circuit, just after the switch is closed, is equal to (1) Zero (2) V/L (3) V/C (4) V.L/C
Last Answer : When is a series RLC circuit is over damped
Description : In which non-conventional source of energy is India referred to as a super power ? -SST 10th
Last Answer : India is referred to as a super power in wind power.
Description : What of the following is the non-conventional source of energy?
Last Answer : What of the following is the non-conventional source of energy? A. Coal B. Petroleum C. Electricity from nuclear power plants D. Solar radiations
Description : Which of the following is the non conventional source of energy
Last Answer : Which of the following is the non conventional source of energy A. Coal B. Petroleum C. Electricity from nuclear power pbnts D. Solar radiations
Description : Which one is not a non-conventional energy source? (1) Nuclear energy (2) Solar Energy (3) Wind energy (4) Tidal power
Last Answer : (1) Nuclear energy Physical Geography (Set: 08)
Description : Pick out the wrong statement. (A) Geothermal energy is a non-conventional source of energy (B) Mass is converted into energy in both nuclear fission & fusion reaction (C) Inhalation of mercury vapour is not harmful for human beings (D) Inhalation of arsenic causes cancer
Last Answer : (C) Inhalation of mercury vapour is not harmful for human beings
Description : Which of the following uses non-conventional Source of Energy? (1) Kerosene lamp (2) Wax candle (3) Solar lantern (4) Torch
Last Answer : (3) Solar lantern
Description : Which one of the following is not a non–conventional source of energy? (1) Solar Energy (2) Natural Gas (3) Wind Energy (4) Tidal Power
Last Answer : Natural Gas
Last Answer : Nuclear energy