Description : In the circuit diagram shown in Figure E=18V , L=2H, `R_(1)=3Omega , R_(2)=6Omega`. Switch S is closed at t=0 Match the following:
Last Answer : In the circuit diagram shown in Figure E=18V , L=2H, `R_(1)=3Omega , R_(2)=6Omega`. Switch S is closed at t=0 Match the following:
Description : As the switch `S` is closed in the circuit shown in figure, current passed through it is.
Last Answer : As the switch `S` is closed in the circuit shown in figure, current passed through it is. A. `4.5A` B. `6.0A` C. `3.0A` D. zero
Description : In the circuit shown in figure switch S is closed at time t=0 Takin left to right current through the indcutor as apositive current, current through i
Last Answer : In the circuit shown in figure switch S is closed at time t=0 Takin left to right current through the ... inductor varies with time as A. B. C. D.
Description : In the circuit shown in figure switch S is closed at time t=0 At what time current through `3Omega` resistance and 1H inductor are equal?
Last Answer : In the circuit shown in figure switch S is closed at time t=0 At what time current through `3Omega` resistance and ... 5)/(3))` D. `Insqrt((8)/(3))`
Description : In the circuit shown in figure switch S is closed at time t=0 Current I from the battery at time t is given by
Last Answer : In the circuit shown in figure switch S is closed at time t=0 Current I from the battery at time t is given by A. ` ... 3(1-e^(-t//9)) D. `3-e^(-2t)`
Description : A coil of 500 turns is linked with a flux of 25 mwb, when carries a current of 12.5A. Calculate the value of self-inductance.
Last Answer : Ans: Self-Inductance: L = NΦ /I = 500 × 25 × 10-3 / 12.5 = 1 H
Description : The current in the circuit shown in figure - What will be the current in the circuit? a. 1/45A b. 1/10A c. 1/5A d. 5A
Last Answer : b. 1/10A
Description : The equivalent inductance of two coils with series opposing flux having inductances 7H and 2H with a mutual inductance of 1H. a) 10 b) 7 c) 11 d) 13
Last Answer : b) 7
Description : The equivalent inductances of two coils 2H and 5H in series aiding flux with mutual inductance of 3H is a) 10 b) 30 c) 1 d) 13
Last Answer : d) 13
Description : In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when the switch S is closed, is
Last Answer : In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when ... )^(2)` D. `8 CV _(0)^(2)`
Description : In the circuit diagram shown in figure match the following two columns when switch S is closed.
Last Answer : In the circuit diagram shown in figure match the following two columns when switch S is closed.
Description : In the circuit shown in figure switch S is closed at time t=0 Potential difference across `3Omega` resistance at time t is given by
Last Answer : In the circuit shown in figure switch S is closed at time t=0 Potential difference across `3Omega` resistance at time t ... 2t)` D. `18(1-e^(-t//9))`
Description : An open-circuit fault between the pressure switch and the 'annunciator module' shown in the illustration would cause the alarm circuit to react in the same manner as if ___________. EL-0094 A. 3.5 ... below switch setting C. 50 PSI were applied to the 'setpoint module' D. the pressure switch closed
Last Answer : Answer: B
Description : A circuit is connected as shown in the figure with the switch S open. When the switch is closed, the total amount of charge that flows from Y to X is
Last Answer : C
Description : A coil =of inductance `L=50muH` and resistance =`0.5Omega` is connected to a battery of emf=5A. A resistance of `10Omega` is connected parallel to the
Last Answer : A coil =of inductance `L=50muH` and resistance =`0.5Omega` is connected to a battery of emf=5A. A resistance ... is (0.02)x in mJ. Find valuie of x.
Description : The illustrated circuit is a wheatstone bridge. If the meter 'G' reads 0 with the switch closed then ________. EL-0024 A. the current through R1 - R2 is equal to the current through R3 - Rx B. the voltage ... of E C. the resistance of Rx is equal to the resistance of R2 D. all the above are true
Last Answer : Answer: A
Description : The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0+, the current through the 1 micro farad capacitor is A) 0A B) 1A C) 1.25A D) 5A
Last Answer : The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0+, the current through the 1 micro farad capacitor is 1A
Description : The potentiak difference across a 2H inductor as a function of time is shown in the figure. At time t=0, current is zero. Current versus time graph ac
Last Answer : The potentiak difference across a 2H inductor as a function of time is shown in the figure. At time t=0, ... across the inductor will be A. B. C. D.
Description : In the system shown in the illustration, the station at section I is unable to signal any other station nor is any other station able to signal the station in section I. The station can, however, ring ... only a single station to respond to itself. D. The switch at component 'C' is stuck open.
Description : Six resistance are connected as shown in figure. If total current flowing is `0.5A`, then the potrential difference `V_(A)-V_(B)` is
Last Answer : Six resistance are connected as shown in figure. If total current flowing is `0.5A`, then the potrential difference `V_(A) ... V B. 6 V C. 2 V D. 4 V
Description : The 'safe switch' of the winch controller shown in the illustration is operated _______________. EL-0102 A. through the master switch handle B. when heater circuit current is high C. by contactor coil 'FR' D. manually by the winch operator
Last Answer : Answer: D
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 : A fuse will 'blow' if _____________. A. an electric motor is stopped suddenly by opening a switch B. the flow of current to the protection device is reversed C. the electrical current exceeds the rated value of the fuse D. unequal resistors are connected in parallel
Last Answer : Answer: C
Description : An uncharged capacity ER C=`100muF` with a resistor is connected with AC source as shown in the figure If R= is `50Omega` and switch S is closed at t=
Last Answer : An uncharged capacity ER C=`100muF` with a resistor is connected with AC source as shown in the figure If R ... `(v_(A)-V_9B)` is k volt. Calculate K
Description : In the figure shown `C_(1)=1F, C_(2)=2F and L=5H`. Initially `C_(1)` is charged 50V and `C_(2)` to 10V. Switch S is closed at time t=D. Suppose at som
Last Answer : In the figure shown `C_(1)=1F, C_(2)=2F and L=5H`. Initially `C_(1)` is charged 50V and `C_(2)` to 10V. ... will A. 10 J B. 15 J C. 25 J D. 40 J
Last Answer : In the figure shown `C_(1)=1F, C_(2)=2F and L=5H`. Initially `C_(1)` is charged 50V and `C_(2)` to 10V. ... (2) A` C. `20sqrt(3) A` D. `12sqrt(6) A`
Last Answer : In the figure shown `C_(1)=1F, C_(2)=2F and L=5H`. Initially `C_(1)` is charged 50V and `C_(2)` to 10V. ... ` B. `15sqrt(2) A` C. `10 A` D. `20 A`
Description : As shown in the illustration, the symbol is used in electrical drawings to designate a ____________. EL-0026 A. limit switch with one set of normally open contacts B. maintaining type ... type push button with a mechanical interlock D. normally closed contact held open mechanically by an interlock
Description : When the master switch for the winch shown in the illustration is in the 'off' position, and the line & safe switches are closed, which of the listed relays should be energized? EL-0102 A. 'DB' & '2T' B. 'DB' & '4M' C. 'FR-B.O.' & 'LV' D. '1M' & '1A'
Description : When the operating handle is in the 'off' position, which master switch contacts for the winch shown in the illustration are closed? EL-0102 A. 'MS-DB & OL' B. 'MS-3, 5, 6, 7, & 8' C. 'MS-LVa & OL' D. 'MS-3, 7 & Reset'
Description : When 'selector switch' 'SEL8' shown in the illustration is in the 'TEST' position, contacts '3,4' and '7,8' are respectively ____________. EL-0100 A. open; closed B. closed; open C. open; open D. closed; closed
Description : When 'selector switch' 'SEL8' shown in the illustration is in the 'OFF' position, contacts '3,4' and '7,8' are respectively ____________. EL-0100 A. open; closed B. closed; open C. open; open D. closed; closed
Description : When 'selector switch' 'SEL8' shown in the illustration is in the 'ON' position, contacts '3,4' and '7,8' are respectively ______________. EL-0100 A. open; closed B. closed; open C. open; open D. closed; closed
Description : The 'reset' contacts of the master switch shown in the illustration are ______________. EL-0102 A. closed only when the master switch is 'off' B. closed only when the master switch selects a 'run' condition C. opened separately by the winch operator D. opened when line voltage drops 10%
Description : 'A-1', as shown in the illustration, is/are ____________. EL-0017 A. normally-closed overload relay contacts B. a double pole knife switch C. normally-open overload relay contacts D. a single pole knife switch
Description : The purpose of the 'heater resistors' for the winch circuit shown in the illustration is to _______________. EL-0102 A. limit the current in the heater circuit B. dispel moisture in the ' ... panel C. keep the winch brake housing below the dew point D. maintain winch motor operating temperature
Description : In order to prevent the winch shown in the illustration from turning while troubleshooting the controller circuit, _________________. EL-0102 A. set the dynamic brake by clamping contact 'DB' closed B. set the ... at 'B1' and 'B2' D. open the test link preventing current flow to the armature
Description : Inductance is the property of an electric circuit that _____________. A. opposes any change in the applied voltage B. opposes any change in the current flow through the circuit C. aids any changes in the applied voltage D. aids any changes in the current through the circuit
Description : Refering to the illustrated schematic diagram, which of the following statements is true when the motor is running in the forward direction? EL-0011 A. Normally-open contacts '4-5' are closed. B. Current ... switch. C. Normally-closed contacts 'R' are open. D. The blowout coils must be closed.
Description : Find the force due to a current element of length 2cm and flux density of 12 tesla. The current through the element will be 5A. a) 1 N b) 1.2 N c) 1.4 N d) 1.6 N
Last Answer : b) 1.2 N
Description : Find the force on a conductor of length 12m and magnetic flux density 20 units when a current of 0.5A is flowing through it. a) 60 b) 120 c) 180 d) 200
Last Answer : b) 120
Description : In given LR circuit the switch S is closed at time `t=0` then
Last Answer : In given LR circuit the switch S is closed at time `t=0` then A. The ratio of induced emfs in ... potential difference `V_(A)-V_(B)` will be constant
Description : If a single-phase induction motor fails to start, the problem may be _____________. A. an open in the main winding B. a shorted shunt field C. a closed centrifugal switch D. low circuit frequency
Description : If a single-phase induction motor fails to start, the problem may be _____________. A. an open in the run winding B. a shorted shunt field C. a closed centrifugal switch D. low circuit frequency
Description : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is
Last Answer : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is A. ... )l)/(2piR)(theta+sintheta)` D. None of these
Description : In the circuit shown in Fig. 4.67, the resistance of the ammeter A is negligible and that of thevoltmeter V is very high. When the switch S is open, t
Last Answer : In the circuit shown in Fig. 4.67, the resistance of the ammeter A is negligible and that of ... internal resistance of the cell (iii) value of R.
Description : As shown in the illustration, 'B' is a ____________. EL-0058 A. single-pole, double-throw switch B. double-pole, single-throw switch C. double-pole, double-throw switch D. circuit breaker
Description : The winch shown in the illustration will not operate in any speed in the lowering direction and at an abnormal speed in 'first point hoist'. The possible cause is that _______________. EL-0102 A. ... '1M' in the power circuit are badly corroded D. master switch contacts 'MS6' have weak springs
Description : The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist positions. Which of the listed faults ... '2M' in the power circuit may be badly corroded. D. Series relay 'FR' may be open.
Description : The heaters for the winch circuit shown in the illustration are powered from _____________. EL-0102 A. a separate source B. the winch main bus C. the master switch power circuit D. the contactor control circuit