Choose the correct answer. Each question carries 3 marks.
1) (𝑥2𝑦3)2
=.....................
A)
𝑥4𝑦5
B)
𝑥4𝑦6 C)
𝑥4𝑦3
D)
𝑥2𝑦6
2) 
=…………..
=…………..
A)
𝑥−2𝑦−2 B)
𝑥−2𝑦−6 C)
𝑥−6𝑦−2 D)
𝑥−6𝑦−6
3)
(2𝑥24𝑦2)2 =.............
A)
64𝑥2𝑦2
B)
8𝑥4𝑦4
C)
64𝑥4𝑦4 D)
6𝑥𝑦4
4) Solve t2
- 2t + 1 = 0
A) 1 B) -1 C) 1, -1 D)
0
5) Solve x2
= x + 20
A) -5, 4 B) 5, -4 C) 5, 4 D) -5, -4
6) A resistor of 10 Ω, an inductor of 0.3H and a capacitor of 100
µF are connected in series across a 230V, 50 Hz mains. Calculate the total
current.
A) 4.6A B)
3.2A C)
4.2A D) 3.6A
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) If 24
cells of 1.5V emf each are connected in series, calculate the total emf.
A) 25.5V B) 16V C) 36V D) 22.5V
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 Ω, 10 Ω and 15 Ω 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) Calculate
the total capacitance if 20µF, 30µF and 40µF capacitors are connected in
parallel.
A) 9.2 µF B) 90 µF C) 53.85 µF D) 0.108 µF
12) Convert
12kW into HP (British System)
A) 16.08 HP B) 8.9 HP C) 16.31 HP D) 8.826
HP
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) Aluminum
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 magnet D)
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)
The process of heating hardened steel to a suitable temperature is
called.........
A) Annealing B) Hardening C) Normalizing D) Tempering
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