Choose the correct answer. Each question carries 3 marks.
1) (𝑥2𝑦3)2 =.....................
A) 𝑥4𝑦5 B) 𝑥4𝑦6 C) 𝑥4𝑦3 D) 𝑥2𝑦6
7) Formula of instantaneous value of current is.........
A) i = Iav sin 2wt B) i = Im sin 2wt C) i = Im 2sin wt D) i = Im sin wt
8) Peak factor of AC is..........
A) 1 B) 1.73 C) 0 D) 1.41
9) RMS value of AC is 12mA. What will be its average value?
A) 12.1mA B) 10.8mA C) 11.9mA D) 7.6mA
10) Three resistors of 5 ohm, 10 ohm and 15 ohm are connected in parallel across a 120V
source. Calculate the total current through the circuit.
A) 18.8A B) 34A C) 44A D) 12.5A
11) Bigger unit of resistance is........
A) giga ohm B) terra ohm C) mega ohm D) micro ohm
12) Calculate the effective resistance in a circuit when three resistors of 20, 15 and 30 ohm
are connected in series?
A) 50 ohm B) 65 ohm C) 35 ohm D) 45 ohm
13) The property of a material to regain its original shape after the removal of the external
load is...........
A) Plasticity B) Elastic body C) Elasticity D) Elastic body
14) Unit of stress in MKS system is..........
A) dynes/cm2 B) N/cm2 C) N/m2 D) dynes/cm2
15) A metal wire is 2.5mm diameter and 2m long. A force of 12N is applied to it and it
stretches 0.3mm. Assume the metal is elastic. Determine the Young's modulus of the wire.
A) 1.5 x 104 N/mm2 B) 1.6 x 104 N/mm2 C) 1.7 x 104 N/mm2 D) 1.8 x 104 N/mm2
16) The process of adding controlled impurities to an intrinsic semiconductor is............
A) Banding B) Insulating C) Doping D) Di-electric
17) Which of the following is not a type of conductor?
A) Bare B) Insulated C) horse-shoe D) stranded
18) The instrument used to measure insulation resistance is........
A) Ammeter B) Voltmeter C) Megger D) CRO
19) ................ is an example for intrinsic semiconductor.
A) Boron B) Germanium C) Phosphorus D) Aluminium
20) Unit of magnetic flux in SI system is..........
A) Maxwell B) Weber C) tesla D) gauss
21) The property of a magnetic circuit which opposes the establishment of magnetic flux in it
is called...........
A) Permeability B) Non-hydroscopic C) Reluctance D) mmf
22) The type of magnet used in relays, solenoid etc. is..............
A) Bar magnet B) Ring magnet C) Horse-shoe magnetD) Electromagnet
23).............. is the device used to measure atmospheric pressure.
A) Manometer B) Barometer C) SphygmomanometerD) Pressure gauge
24) 1 bar = .................Pa
A) 103 Pa B) 104 Pa C) 105 Pa D) 106 Pa
25) Which of the following is not a manometer?
A) Differential B) Diaphram C) Inverted D) Closed tube
1) (𝑥2𝑦3)2 =.....................
A) 𝑥4𝑦5 B) 𝑥4𝑦6 C) 𝑥4𝑦3 D) 𝑥2𝑦6
7) Formula of instantaneous value of current is.........
A) i = Iav sin 2wt B) i = Im sin 2wt C) i = Im 2sin wt D) i = Im sin wt
8) Peak factor of AC is..........
A) 1 B) 1.73 C) 0 D) 1.41
9) RMS value of AC is 12mA. What will be its average value?
A) 12.1mA B) 10.8mA C) 11.9mA D) 7.6mA
10) Three resistors of 5 ohm, 10 ohm and 15 ohm are connected in parallel across a 120V
source. Calculate the total current through the circuit.
A) 18.8A B) 34A C) 44A D) 12.5A
11) Bigger unit of resistance is........
A) giga ohm B) terra ohm C) mega ohm D) micro ohm
12) Calculate the effective resistance in a circuit when three resistors of 20, 15 and 30 ohm
are connected in series?
A) 50 ohm B) 65 ohm C) 35 ohm D) 45 ohm
13) The property of a material to regain its original shape after the removal of the external
load is...........
A) Plasticity B) Elastic body C) Elasticity D) Elastic body
14) Unit of stress in MKS system is..........
A) dynes/cm2 B) N/cm2 C) N/m2 D) dynes/cm2
15) A metal wire is 2.5mm diameter and 2m long. A force of 12N is applied to it and it
stretches 0.3mm. Assume the metal is elastic. Determine the Young's modulus of the wire.
A) 1.5 x 104 N/mm2 B) 1.6 x 104 N/mm2 C) 1.7 x 104 N/mm2 D) 1.8 x 104 N/mm2
16) The process of adding controlled impurities to an intrinsic semiconductor is............
A) Banding B) Insulating C) Doping D) Di-electric
17) Which of the following is not a type of conductor?
A) Bare B) Insulated C) horse-shoe D) stranded
18) The instrument used to measure insulation resistance is........
A) Ammeter B) Voltmeter C) Megger D) CRO
19) ................ is an example for intrinsic semiconductor.
A) Boron B) Germanium C) Phosphorus D) Aluminium
20) Unit of magnetic flux in SI system is..........
A) Maxwell B) Weber C) tesla D) gauss
21) The property of a magnetic circuit which opposes the establishment of magnetic flux in it
is called...........
A) Permeability B) Non-hydroscopic C) Reluctance D) mmf
22) The type of magnet used in relays, solenoid etc. is..............
A) Bar magnet B) Ring magnet C) Horse-shoe magnetD) Electromagnet
23).............. is the device used to measure atmospheric pressure.
A) Manometer B) Barometer C) SphygmomanometerD) Pressure gauge
24) 1 bar = .................Pa
A) 103 Pa B) 104 Pa C) 105 Pa D) 106 Pa
25) Which of the following is not a manometer?
A) Differential B) Diaphram C) Inverted D) Closed tube
No comments:
Post a Comment