Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 31 to 40 out of 137 Questions
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31.
Which of the following statements are true with regard to resistivity?
(a) Resistance depends on the temperature
(b) Resistance does not depend on the temperature
(c) Resistivity depend on the length
(d) Resistivity depend on area of cross section
Answer:

Option (a)

32.
The reciprocal of resistivity is________
(a) Conductance
(b) Resistance
(c) Conductivity
(d) Impedance
Answer:

Option (c)

33.
Resistivity of a wire depends on
(a) length
(b) material
(c) cross section area
(d) none of the above
Answer:

Option (b)

34.
Which of the following is not the same as watt?
(a) joule/sec
(b) amperes/volt
(c) amperes x volts
(d) ( amperes )2 x ohm
Answer:

Option (b)

35.
One kilowatt hour of electrical energy is the same as
(a) 36 x 105 watts
(b) 36 x 105 ergs
(c) 36 x 105 joules
(d) 36 x 105 B.T.U.
Answer:

Option (c)

36.
A circuit contains two un-equal resistances in parallel
(a) current is same in both
(b) large current flows in larger resistor
(c) potential difference across each is same
(d) smaller resistance has smaller conductance
Answer:

Option (c)

37.
Conductance is expressed in terms of
(a) Ω/m
(b) m/Ω
(c) ℧/m
(d) ℧
Answer:

Option (d)

38.
Two resistances R1 and R2 give combined resistance of 4.5 ohms when in series and 1 ohm when in parallel. The resistances are
(a) 3 ohms and 6 ohms
(b) 3 ohms and 9 ohms
(c) 1.5 ohms and 3 ohms
(d) 1.5 ohms and 0.5 ohms
Answer:

Option (c)

39.
We have three resistances of values 2 Ω, 3 Ω and 6 Ω. Which of the following combination will give an effective resistance of 4 Ω?
(a) All the three resistances in parallel
(b) 2 Ω resistance in series with parallel combination of 3 Ω and 6 Ω resistance
(c) 3 Ω resistance in series with parallel combination of 2 Ω and 6 Ω resistance
(d) 6 Ω resistance in series with parallel combination of 2 Ω and 3 Ω resistance
Answer:

Option (b)

40.
The unit of electrical conductivity is
(a) mho/metre
(b) mho/(metre)2
(c) ohm/metre
(d) ohm/(metre)2
Answer:

Option (a)

Showing 31 to 40 out of 137 Questions
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