UNIT-1(introduction
to electrical engineering)
SECTION-I: Multiple choice questions
1. Ohm’s law is applicable to _________ [ d ]
(a) Semiconductors (b) Electrolytes (c) Arc Lamps
(d) None
2. Kirchhoff’s laws are valid for
__________ circuits. [ d ]
(a) Linear (b) Passive time invariant (c) Non
Linear (d) both Linear & Non Linear
3. The capacitance of a parallel plate capacitor is
not affected by _______ [ b ]
(a) Area of Plates (b) Thickness of plates
(c) Separation between plates (d) Nature of
Dielectric.
4. The relationship between Electrical energy (
E),Voltage( V) and Charge( Q) is [ c ]
1.
E=Q / V B) E=QV2 C) E=Q x V D) E=
V / Q2
5. The curve representing Ohm’s
law is _________ [ b ]
(a) Sine function (b) Linear (c) Parabola (d) Hyperbola
6.) Resistance of human body is
about _____Ω [ c ]
(a) 10 (b) 100 (c) 1K (d) Zero
7).The ratio of voltage and
current in a closed circuit is ________ [ a ]
(a) Remains Constant (b) Varies (c) Increases (d) Falls
8) Identify the passive element
among the following [C]
A.
Voltage source B. current source
C.inductor D. transistor
9).How much energy is stored by a
0.05μF capacitor with a voltage of 1000V? [ A]
A.0.025J B.0.05J C.5J D. 100J
10).Mesh Analysis is based on ……… [B ]
A.
KCL B.KVL C. Both D. None
11). The unit of quantity of
electricity is [ B]
(A) Ampere (B) Coloumb (C) Ohm (D) Electron Volt
12) Conductance is the reciprocal of [ c]
(A) Reactance (B) Impedance (C) Resistance (D)
capacitance
13)
Constant Voltage source is __________ [c ]
(a) Active & Bilateral (b) Passive & Bilateral
(c) Active & Unilateral (d) Passive &
Unilateral
14).The relationship between
voltage & current is same for two opposite directions of current in case of
__________ network. [ d]
(a) Active (b) Passive (c) Unilateral (d) Bilateral
15) An Ideal current source has
zero ____ [ a]
(a) Internal Conductance (b) Internal resistance (c) Voltage on No load
(d) Ripple.
16).
Kirchoff’s Laws are applicable to ________
circuits. [c ]
(a) AC (b) DC (c) AC & DC (d) Passive Networks only
17) The resistance of the conductor
depends on the [ d]
A) Cross section area B) Resistivity of the conductor
C) Length D) All the above
18) One Farad is equal to [c ]
A) 1 ohm B) 1 V/C C) 1 C/V D) None of the above
19) The unit of inductance is [ a]
A) Henry B) V sec / A C) Both D) Farad
20) If in a circuit, the voltage is
reduced to half and resistance is doubled, the current will be [c ]
a) 4 Times b) double c) quarter d) half
21) Kirchoff’s law is applicable to [ c]
a) Ac circuits only b) Dc circuits only c) Both d) passive
networks only
22) The construction for the validity
under ohm’s law is that: [a ]
A)Temperature should remain
constant B)Current should be proportional to voltage
C)Resistance must be wire would type D)All the above
23 .Kirchhoff’s current law is
applicable only to [d ]
a) Electric circuits b)
electronic circuits
c) Closed loops in a network d) Junctions in network
24. An electric
current is the __________ [b ]
a) Random movement of electrons
in a conductor
b) Movement of free electrons
predominately in one direction
c) Pressure difference between two poles d) the power that
causes drift of electrons
25) The charge Q flowing through a conductor carrying current of I
amperes for t seconds is equal to [ a]
(A)It sec. (B)I/t sec. (C)I/t
Amp./Sec. (D) None of these
26). The curve representing ohm’s law
is [b ]
(A)Sine function (B) linear (C) a parabola (D) a hyperbola
27). the unit of Inductance is
__________ [ b]
A) Ohms B) Henry C) Farads D) Watts
28). _____________ law states that
the sum of the currents entering into any node is equal to the sum of the
currents leaving that node [c ]
A)Kirchoff’s Voltage B) Faradays C) Kirchoff’s Current D) Electromagnetic
29). A linear resistor is one which
obeys [c]
(A) Ampere’s Law (B) Lenz’s Law (C)
Ohm’s Law (D) Kirchhoff’s Law
30). the specific resistance is measured in [ a]
(A)Ω-m (B) Ω/m (C)Ω/m (D) Ω/m 32
31). Constant voltage source is [ d]
(A) Active and bilateral (B) passive and bilateral
(C) Passive and unilateral (D)
active and unilateral
32). A pure inductor [d ]
a) dissipate energy b)stores
energy c) doesn’t dissipate energy d) both b,c
33). A capacitor C=5 microfarad.
Calculate stored energy in it if a d.c voltage of 100v is applied across it [ a]
a)0.025J b) 0.0025 J c) 0.25J d)
2.5 J
SECTION-II: Fill in the blanks
1.
The
condition for validity under ohm’s law is that constant
temperature
2.
Capacitance is the property of a circuit
element to oppose sudden
changes in voltage
3.
The best
conductor of electricity is
silver
4.
. the property of opposing the
flow of electrons is called as RESISTANCE………..
5.
Inductor
acts as short circuit to DC
6.
Ideal sources is nothing but sources …without…………… losses
7.
The examples for passive elements
are R,L,C
8.
_EMF______________ is the force that causes a current to flow.
9.
Unit of conductance is mho
10.
1 Volt = 1 Joule
per Coulomb
11. The algebraic
sign of an IR drop primarily depends upon the Direction
of flow current
12.The inductor
behaves at steady state as Short circuit
13.Kirchhoff’s
voltage law states that the algebraic sum of all branch voltages
around any closed path in a circuit is always zero at all instants of time.
14. The unit
of capacitance is Farad
14.Capacitance is a measure of
the ability of a capacitor to store an electric charge.
15.The energy
stored in a capacitor is −
16.The capacitor at
steady state behaves like a Open circuit
17.The property of
the material by virtue which it opposes any change in the magnitude or
direction of electric current passing through the conductor is Inductance
18.The voltage a
cross a resistance of ten ohms and 1A current is 10V
