MCQ
61. Rth নির্ণয়ের সময় সার্কিটে কনস্ট্যান্ট কারেন্ট সোর্সকে-
অপর ভোল্টেজ সোর্সের সাথে প্যারালেলে ব্যবহার করা হয়
সমতুল্য ভোল্টেজ সোর্সে রূপান্তরিত করা হয়
'শর্টস্' দ্বারা প্রতিস্থাপন করা হয়
'ওপেনস্' দ্বারা প্রতিস্থাপন করা হয়
62. KCL is the conversion of-
voltage
current
energy
charge
63. If the length and cross section of a piece of conductor are both doubled what will be its resistance (initial resistance R)?
4R
2R
R
1 /4 R
64. If de supply of 10V is fed to a differentiating circuits then output will be --
20V
0V
10V
none of the above
65. Two 10k Ω, 5W resistors in parallel have equivalent resistances of a 5ΚΩ and power rating of-
2.5W
5W
10W
25W
66. 3V, 1Ω-এর একইরূপ দুটি ব্যাটারি একইরূপ পোলারিটিতে প্যারালেলে সংযোগ করা হলো। এ সমবায়ের নর্টন সমতুল্য সার্কিট হবে-
6Α, 1Ω
6Α, 0.5Ω
3Α, 0.5Ω
3Α, 1Ω
67. The ratio of the resistance of a 100W, 220V lamp to that of a 100W 110V lamp will be nearly-
4
2
1/4
1/2
68. Four resistance of values 4, 8, 10 and 40 ohms respectively are joinedd in parallel. The equivalent resistance is ---
2.5Ω
2.0Ω
1.75Ω
2.25Ω
69. A wire's resistance is 12 ohm. If it is divided into two parts and the parts are then connected in a parallel combination, what will be resistance?
3Ω
12Ω
24Ω
6Ω
70. The r.m.s value of sinusoidal 100V peak to peak is-volt.
100/√2
50
50/√2
100
71. A constant voltage is applied across the ends of a conductor. The heat produced is to--- length.
directly proportional
equal
inversely proportional
square
72. Four capacitors each of 40µF are connected in parallel, the equivalent capacitance will be-
160µF
40µF
10µF
5µF
73. The power factor of a purely resistive circuit is---
Unity
Lagging
Zero
Leading
74. How much current flowing through a 100 ohmu resistor resulting 10 volt voltage drop?
0.1A
0.01A
10A
1000A
75. Kirchhoff's current law is applicable to only-
junctions
closed loop
electronic circuit
electrical circuit
76. In a paralle ac circuit, power loss in due to--
conductance alone
susceptance alone
both conductance and susceptance
none of the above
77. Kirchhoff's second law is based on law of conservation of-
charge
energy
momentum
mass
78. Lamps used for house lighting are connected in-
series
mixed grouping
parallel
crossed
79. Two bulbs used at 25W, 110V and 100W, 110V are connected two series to a 230V supply. What will happend?
two bulb will burn out
two bulb will glow out
one bulb will glow out
one bulb will burn out
80. Ohm's Law is---
P = VI
V = IR
I^2R
P=V/R