Description : A suspension insulator string has three units with ground capacitance of 0.2 C and self capacitance of C. Its string efficiency is (a) 75% (b) 78% (c) 80% (d) 85%

Description : A suspension type insulator has three units with self-capacitance C and ground capacitance of 0.2 C having a string efficiency of (a) 80% (b) 82% (c)78% (d) 76%

**Answer** : A suspension type insulator has three units with self-capacitance C and ground capacitance of 0.2 C having a string efficiency of 78%

Description : A suspension type insulator has 2 units with self capacitance C and ground capacitance of 0.2 C. Each unit can withstand for a maximum voltage of 11 kV. Its string efficiency is (A) 78% (B) 82% (C) 80% (D) 84%

**Answer** : Inductance and capacitance in the electrostatic system of units has the dimensions of length.

Description : Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

**Answer** : Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF

Description : With the help of which bridge are the capacitance and dielectric loss of a capacitor generally measured ?

**Answer** : With the help of Schering bridge are the capacitance and dielectric loss of a capacitor generally measured.

Description : What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz #powerfactor

Description : What is capacitance?

**Answer** : Capacitance is the capacity of element to store electric charge in it. The unit of capacitance is Farad.

Description : What is capacitance? State its unit.

**Answer** : Capacitance: The capacity of a capacitor to store electric charge is known as its capacitance. The capacitance of a capacitor is defined as the ratio of the charge Q stored on its either plates to the ... the plates. The capacitance is expressed as, C = Q/V The unit of capacitance is farad.

Description : What happens to the capacitance if mica is inserted between the plates of an air capacitor? A) The capacitance increases B) The capacitance decreases C) The capacitance remains the same D) The capacitance becomes zero

**Answer** : What happens to the capacitance if mica is inserted between the plates of an air capacitor? A) The capacitance increases B) The capacitance decreases C) The capacitance remains the same D) The capacitance becomes zero

Description : What is the capacitance when a capacitor passes a current of 31.43 mA when supplied with 40 V AC with a frequency of 1000 Hz? A) 0.125 F B) 0.125 μF C) 1257.2 μF D) None of these

**Answer** : What is the capacitance when a capacitor passes a current of 31.43 mA when supplied with 40 V AC with a frequency of 1000 Hz? A) 0.125 F B) 0.125 μF C) 1257.2 μF D) None of these

Description : What happens to the angle between current and voltage, when a small capacitance is added in series with a highly inductive circuit? (A) Increases (B) Remains same as earlier angle (C) Decreases (D) Becomes indeterminant

Description : What is the reciprocal of capacitance?

**Answer** : The reciprocal of capacitance is called elastance, and its unit is the reciprocal farad, also called the daraf.

Description : what will be the capacitance if three capacitors connected in parallel each having value of 0.5 micro Farad ?

**Answer** : the total capacitace when connected in parallel Tc=total capacitor c1=c2=c3=0.5uf Tc=c1+c2+c3 Tc=1.5uf

Description : A two farad and a four farad capacitor are connected in parallel. What single capacitance is "equivalent" to this combination?

**Answer** : ANSWER: 6 FARADS

Description : If a three farad capacitor and a six farad capacitor are connected in parallel, what is their equivalent capacitance?

**Answer** : ANSWER: 9 FARADS

Description : A two farad and a four farad capacitor are connected in series. What single capacitance is "equivalent" to this combination?

**Answer** : ANSWER: 4/3 FARADS

Description : What is the choice of size and number of generator units in interconnected power system?

**Answer** : Choice of Size and Number of Generating Units: 1. The size/rating and number of generating units in such way that they approximately match with the load curve as closely as possible. 2. In ... , if power plant is connected to grid system then generating unit of higher capacity can be installed.

Description : In the United States, the units of measure for the potential biological risk associated with exposure to ionizing radiation are the rem and millirem. What comparable units are used in the metric system?

**Answer** : ANSWER: SIEVERTS or MILLISIEVERTS

Description : What are the basic units from which human spare parts can be created? (1) Nerve cells (2) Stem cells (3) Heart cells (4) Kidney cells

**Answer** : Stem cells

Description : What are the SI derived units?

**Answer** : Electrical capacitance, electrical resistance, electrical inductance, force, energy, power, magnetic flux, electric charge, and electric potential difference and EMF. These are the nine SI derived units.

Description : What are the seven base units?

**Answer** : Length, mass, time, electric current, temperature, luminous intensity and amount of substance are the seven base units.

Description : effect of inductance and capacitance on performance of transmission line.

**Answer** : Following are the effect on performance of transmission line: 1. Due to inductance (L) voltage drop in transmission line produces. 2. Capacitor (C) draws charging current ... , transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.

Description : Energy stored in electrostatic field of capacitance formula

**Answer** : Energy stored in electrostatic field of capacitance formula

Description : Define each of following terms of operational amplifiers i) Slew rate ii) Input offset voltage iii) Voltage gain iv) Input capacitance

**Answer** : i) Slew rate:- Maximum rate of change of o/p voltage per unit of time. It is express in volt/µsec. ii) Input offset voltage:- The voltage that must be applied between two ... capacitance that can be measured at either be inverting or non-inverting terminal with other terminal connected to ground.

Description : With neat diagram, explain working of capacitance level measurement.

**Answer** : working : The capacitive level detector operates on the equation of parallel plate capacitor, i.e. C = ε A/d. It consist of an insulated capacitance probe (which is a metal electrode) ... in the capacitance is measured and is displayed on the indicator calibrated in terms of liquid level.

Description : State the effects of errors in dynamometer type wattmeter due to i) pc- inductance ii) pc- capacitance iii) mutual inductance iv) Connection.

**Answer** : Errors in wattmeter: i) pc - inductance: Pressure coil inductance causes wattmeter to read more power than actual . ii) pc-capacitance: The wattmeter reads less power. iii) ... iv) Connection: In uncompensated wattmeter , the reading of wattmeter includes the powerloss in coils.

Description : The capacitance of reverse biased P-N junction 1. Decreases with increasing the reverse bias 2. Increases with increasing the reverse bias 3. Depends only on reverse saturation current 4. Makes the P-N junction more effective at high frequencies

**Answer** : The capacitance of reverse biased P-N junction Decreases with increasing the reverse bias

Description : In a 3-insulator string voltage distribution system the ratio of capacitance between pin and earth to the self capacitance of each unit is 1/4. If the potential across the top unit is 8 kV, then the string voltage is (A) 22.5 kV (B) 24 kV (C) 26 kV (D) 32.5 kV

**Answer** : In a 3-insulator string voltage distribution system the ratio of capacitance between pin and earth to the self capacitance of each unit is 1/4. If the potential across the top unit is 8 kV, then the string voltage is 32.5 kV

Description : A series RLC circuit resonate at 200 Hz. If the capacitance is increased to four times, the circuit will be in resonance at (a) 100 Hz (b) 200 Hz (c) 400 Hz (d) 800 Hz

Description : A parallel combination of capacitance C and resistance R is connected in series with inductance L and small resistance r. Under what condition will the circuit be non-reactive? (A) C=LR (B) C=LR2 (C) C=L/R2 (D) C=L/R

Description : The capacitance of 0-1000V electrostatic voltmeter increases from 36-42 pF from zero to full scale deflection. It is required to extend the range of voltmeter to 10000 V by using an external series capacitor. What should be the value of ... ? (A) 0.8 pF (B) 1.00 pF (C) 6.644 pF (D) 4.667 pF

Description : The time constant of the capacitance circuit is defined as the time during which voltage?

**Answer** : The time constant of the capacitance circuit is defined as the time during which voltage rises to 63.2% of its final steady value.

Description : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value?

**Answer** : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value will increase the selectivity of the circuit.

**Answer** : Resistance: This could be defined as the opposition or retarding force to the flow of current in a circuit. It is measured in Ohms. Capacitance: The ability of a system of electrical conductors and insulators ... due to a rate of change of current in the circuit or coil. It's unit is Henry.

Description : The length of both sides of a square parallel plate capacitor are doubled. The capacitance is: w) halved x) the same y) doubled z) quadrupled

**Answer** : ANSWER: Z -- QUADRUPLED

Description : Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE? w) All three of the capacitors have the same potential difference between their plates. x ... y) The capacitance of the system depends on the voltage applied across the three capacitors.

**Answer** : ANSWER: X -- THE MAGNITUDE OF THE CHARGE IS THE SAME ON ALL OF THE CAPACITOR PLATES

Description : How will the total capacitance change, when two capacitors are connected in parallel?

**Answer** : The capacitance will increase if connected in parallel because it will be like you have increase surface area of a plate by connecting it to another.

Description : State different types of power in ac circuits. Write the expression and units for the same. Draw the power triangle.

**Answer** : i) Active Power (P):- The active power is defined as the average power Pavg taken by or consumed by the given circuit. ii) Reactive Power (Q):- The reactive power is defined as the product of ... values of voltage (v) and current (I) it is given by iv) Power Triangle:

Description : Define absolute pressure and gauge pressure. State the different units for pressure measurement.

**Answer** : Definition: Absolute pressure: Absolute pressure is defined as actual total pressure including atmospheric pressure actin On a surface. PAbsolute= PAtmospheric + PGauge Gauge pressure: Gauge pressure is defined ... mm of mercury column (blood pressure) inches of water Barmillibar (weather) Torr

Description : List the four different units of pressure.

**Answer** : Different units of pressure. 1) Measured in pascal(Pa). 2) Measured in pounds per square inch(psi) 3) Measured in kilogram per square of centimeter (Kg/cm2 ). 4) Measured in newton per square meter (N/m2 ). 5) Measured in terms of liquid columns. mmHg or mmWc

Description : The maximum demand of consumer is 2 kW and his daily energy consumption is 20 units. Its Load Factor is (1) 10.15% (2) 41.6 % (3) 50 % (4) 60%

**Answer** : Total maximum demand of energy in a day = 2kw*24= 48 units Consumer consumption is 20 units . Load factor = (number of units utilizing)/(total max. demand) = 20/48 = 41.6%

Description : Which of the following units is connected with discharge in a domestic water pump? A) Kg/SqCm B) RPM C) LPM D) N/m2

Description : Distances to stars are usually expressed in units called a. miles b. b. kilometers c. c. light-years d. astronomical units

**Answer** : c. c. light-years

Description : Why are distances in space often measured in light years? A. The light year is a commonly used unit of measure. B. Distances in space are so great that a large unit is needed. C. Scientists always use metric units like light years. D. Light years are easy to measure and understand.

Description : Strategic planning: (a) Addresses the organization's basic mission or business, issuing broad statements of purpose or direction that have a long lead time. (b) Involves managers in each unit of ... overall plans of the organization. (d) Determines the day-to-day operations within an organization.

**Answer** : (a) Addresses the organization's basic mission or business, issuing broad statements of purpose or direction that have a long lead time.

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