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Right answer is (B) Internet combustion vehicles

To ELABORATE: Full form of ICV is Internal combustion vehicle. It requires fuel for propulsion. It consists of a PISTON ATTACHED in a CYLINDER chamber.

The CORRECT option is (b) Electric VEHICLES

For EXPLANATION I would say: FULL form of EV is Electric Vehicles. It uses an electric motor for the machine propulsion. It does not CAUSE pollution as there is no tail-to-pipe emission.

The CORRECT option is (a) True

Best explanation: Diode is a unidirectional device. It starts CONDUCTION when CURRENT flows from cathode to anode of the diode. It is a bipolar device.

The correct choice is (c) .5 Hz

To EXPLAIN I would say: The FUNDAMENTAL time period of the sine wave is 2π. The time period of i(t) is L.C.M {2,2,2}=2 SEC. The frequency of the waveform is 1/2=.5 Hz. The time period is independent of PHASE SHIFTING and time-shifting.

The correct OPTION is (c) 0 W

For EXPLANATION: The capacitor is a linear element. It only absorbs reactive power and STORES it in the FORM of oscillating energy. The voltage and current are 90° in phase in case of the capacitor so the angle between V & I is 90°. P = VIcos90° = 0 W.

The CORRECT option is (a) True

For explanation I would say: A battery is a COMBINATION of CELLS connected in parallel and series. It converts chemical ENERGY into electrical energy.

Correct answer is (a) ALESSANDRO Volta

Best EXPLANATION: A battery converts the CHEMICAL energy into electrical energy. Alessandro Volta invented the battery in 1800. He was an ITALIAN scientist.

The correct answer is (c) Benjamin Franklin

To elaborate: Benjamin Franklin was the FIRST who COINED the TERM battery. BATTERIES were the main source of electrical energy before the invention of generators.

Right answer is (a) 545.5 V

To elaborate: The line voltage in the CASE of STAR connection is 1.73 times of phase voltage. It LEADS the phase voltage by an angle of 30°. VL-L=1.73×315=545.5 V.

Correct choice is (c) T ∝ Ia

Easiest explanation: The VALUE of FLUX remains CONSTANT in Ferromagnetic motor. The torque in the Ferromagnetic motor is directly proportional to the armature current.

The correct choice is (a) True

Explanation: The Permanent MAGNETIC moving coil INSTRUMENT measures the AVERAGE value of the signal. It is not suitable for AC MEASUREMENT as pointer FLUCTUATES in case of AC measurement.

The correct ANSWER is (c) 1832

The explanation: The first electric CAR was developed by Robert ANDERSON in 1832. It was the first crude electric VEHICLE. Electric CARS are the future of the automobile industry.

Correct option is (a) .95

For explanation I WOULD SAY: De-rating FACTOR is used to measure the reliability of a string. The value of the De-rating factor is 1-(string EFFICIENCY)=1-.05=.95.

Right choice is (c) -9 V

For explanation I would say: Peak-Peak voltage is equal to the DIFFERENCE between the MAXIMUM and minimum voltage. It is MATHEMATICALLY REPRESENTED as Vp-p=Vmax-Vmin=0-9=-9 V.

The correct option is (b) Bharat Heavy Electrical Limited

To explain: Full form of BHEL is Bharat Heavy Electrical Limited. It is a Government of INDIA ENTERPRISE FOUNDED in 1964. It is a publicly listed company.

The correct OPTION is (d) .5-.7

The BEST I can explain: At light loads, the CURRENT drawn is largely a magnetizing current due to the air gap and hence the POWER factor is low. The power factor of a WRIM generally is .5-.7.

Correct choice is (d) William G. Cobb

For explanation I WOULD SAY: The first SOLAR car was invented by William G. Cobb in 1955. It was a 15-inch vehicle. It was MADE by General Motors.

Correct answer is (b) 1954

Easy explanation: The first solar cell was MADE by Gerald PEARSON in 1954 in BELL laboratories. It was a lithium-silicon photovoltaic cell.

The correct option is (a) Gerald Pearson

To elaborate: The first SOLAR CELL was MADE by Gerald Pearson in 1954 in Bell laboratories. It was a lithium-silicon photovoltaic cell.

Correct option is (a) Saur Sujala Yojana

The best explanation: Full form of SSS is Saur Sujala Yojana. It is an initiative by the GOVERNMENT of India to encourage PEOPLE to use SOLAR ENERGY as an energy SOURCE.

The correct choice is (a) INTERNAL Combustion Engine

Best explanation: Full form of ICE is International Combustion Engine. It CONSISTS of pistons inside the closed chamber in order to drive the MACHINE.

Right choice is (d) 1

Easiest explanation: Fill factor is the RATIO of the MAXIMUM obtainable power to the PRODUCT of the open-circuit voltage and SHORT circuit current. F.F=Pmax÷(Voc×Isc)=5/5=1.

Right ANSWER is (c) T ∝ Ia

To elaborate: The value of FLUX remains constant in PERMANENT MAGNET DC motor. The torque in the PMMC motor is DIRECTLY proportional to the armature current.

Right CHOICE is (a) True

To elaborate: The OUTPUT of the SOLAR panel is DC. Inverters are used at the output TERMINALS of the solar panel in order to CONVERT DC into AC.

Correct choice is (B) False

To elaborate: There are TWO TYPES of Water PUMPS. Centrifugal and RECIPROCATING are the major types of water pumps.

The correct choice is (c) BHARAT Electronics LIMITED

Explanation: The full form of BEL is Bharat Electronics Limited. It is a GOVERNMENT of India enterprise founded in 1954. It is a publicly listed COMPANY.

The CORRECT choice is (a) Central Electronics Limited

Easy explanation: The full form of CEL is Central Electronics Limited. It is a Government of India enterprise FOUNDED in 1974. It is a publicly listed COMPANY.

Right CHOICE is (a) .5 Hz

The best explanation: The FUNDAMENTAL time period of the sine wave is 2π. The time period of i(t) is L.C.M {2,2}=2 sec. The frequency of the waveform is 1/2 = .5 Hz. The time period is INDEPENDENT of phase SHIFTING and time-shifting.

The CORRECT option is (c) 0 W

For explanation: The inductor is a linear element. It only absorbs reactive power and stores it in the FORM of OSCILLATING energy. The voltage and current are 90° in PHASE in case of the inductor so the angle between V & I is 90°. P = VIcos90° = 0 W.

The CORRECT answer is (b) .6-.8

The explanation: At light LOADS, the current drawn is largely a magnetizing current DUE to the air GAP and hence the power factor is low. The power factor of a SCIM generally is .6-.8.

Right answer is (b) 538.66 V

For explanation: The LINE voltage in CASE of star connection is 1.73 times of PHASE voltage. It leads the phase voltage by an angle of 30°. VL-L = 1.73×311 = 538.66 V.

Correct CHOICE is (a) True

The best I can explain: Permanent magnet DC MOTOR is more expensive than an Induction motor because of the MAGNETIC used in it. Magnets are made up of ferromagnetic material which results in high cost.

Correct option is (c) .20

Best explanation: Fill factor is the ratio of the MAXIMUM OBTAINABLE power to the product of the open-CIRCUIT voltage and SHORT circuit current. F.F=Pmax÷(Voc×Isc)=15/72=.20.

Right option is (b) FILL factor

For explanation I WOULD say: FF STANDS for Fill factor. It is the RATIO of the maximum obtainable power to the product of the open-circuit VOLTAGE and short circuit current.

The correct OPTION is (a) SOLAR array

The best I can explain: Series and parallel combination of the solar cell is KNOWN as Solar array. SHUNT diodes are used to avoid the CIRCULATING current.

The correct CHOICE is (a) True

The EXPLANATION is: There are three types of solar CELLS. SINGLE crystal, polycrystal, and amorphous silicon cells are the MAJOR types of solar cells.

Right answer is (a) Electrical energy

The EXPLANATION: A solar cell converts light energy into electrical energy. The light energy EXCITES the electron of the solar cell which further flows in the circuit and CONSTITUTES the ELECTRIC CURRENT.