BASIC ELECTRICAL CIRCUITS

1. Department of Electrical & Electronics Engineering
Name of the Student: Roll Number:
1) For the circuit shown the total resistance is
a) 5Ω b) 10Ω
c) 15Ω d) 20 Ω
2) The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
a) 10 V b) 100V c) 15V d) 20 V
3) 3 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of
the circuit.
a) 10,000W b) 400W c) 1,000W d) 1,111W
4) Meter M1 will measure the
a) Current through R1
b) Supply Current
c) Voltage drop across R1 and R2
d) Voltage drop across R1
5) A poor conductor of electricity is
a) Glass b) Copper c) Aluminium d) Silver
6) Instrument E measures
a) Supply voltage b) Current through a resistor
c) Supply current d) Voltage across a resistor
7) Instrument 4 is measuring
a) the voltage across the resistor
b) the supply current
c) the current through the resistor
d) the supply voltage
8) To measure the voltage across a load the meter must be connected
a) In parallel with the load b) before the load
c) In parallel with the supply d) In series with the load
9) Two resistors of 20 ohms and 40 ohms are connected in series across a 120V D.C. Supply,
the current flowing in the circuit will be
a) 2 A b) 20 A c) 5 A d) 0.5 A
10) When the current through a conductor increases
a) The temperature increases b) The temperature decreases
c) The temperature remains same d) None of the above

2. 11) When an electric current flows through a conductor it
a) Cools down and expands b) Heats up and expands
c) Cools down and contracts d) Heats up and contracts
12) Of the following materials which would be the BEST conductor of electricity?
a) Copper b) Nichrome c) Steel d) Aluminium
13) If four resistors each of 50 Ω are connected in parallel the overall resistance is
a) 12.5 Ω b) 25 Ω c) 100 Ω d) 200 Ω
14) Meter M2 will measure the
a) Supply current
b) Current through R1
c) Voltage drop across R2 and R3
d) Supply voltage
15) Which of the instrument numbers would measure voltage?
a) 1
b) 2
c) 3
d) None of the above
16) For the circuit shown the total current is
a) 10A
b) 0.1A
c) 20A
d) 1.1 A
17) In the diagram below if I1 and I2 are ammeter readings then
a) I1 will be equal to I2
b) I2 will be greater than I1
c) I1 will be greater than I2
d) I1 will be half I2
18) The resistance of an electrical conductor is
a) Proportional to the length and inversely proportional to the cross sectional area
b) Affected by the weather
c) Determined by the formula I = P x V
d) Inversely proportional to length and proportional to cross sectional area

3. 19) In the diagram below instrument B measures
a) The current through R1
b) The current through R3
c) The volt drop across R1 and R2
d) The volt drop across R1
20) What is the formula for two resistors in parallel?
a) R1 x R2/R1 + R2 b) R1 + R2/R1 - R2
c) R1 - R2/R1 x R2 d) R1 + R2/R1 x R2
21) To measure the current through a load the meter must be connected
a) In series with the load b) Across the load
c) In parallel with the supply d) In parallel with the load
22) 3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of
the circuit.
a) 6.66 KW b) 0.666 KW c) 0.333 KW d) 12 KW
23) The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
a) 10V b) 14V c) 20V d) 12V
24) Which of the following is a representation of an electric charge?
a) 2 amperes (A) b) 3000 micro coulombs(C)
c) 10 volts (V) d) 60 watts (W)
25) Which one of the following is an active element?
a) 10 V power supply b) 25 pF capacitor c) 15 kOhm resistor d) 10 mH inductor
26) Which one of the following could be used to represent the units of conductance (G)?
a) Mho b) Inverted Greek letter Omega c) Siemens d) All of these
27) Which one of the following equations could be used to calculate the power absorbed by a
resistor?
a) Power(p) = Voltage squared(v²) / Resistance(R) b) Power(p) = Voltage(v) x Current(i)
c) Power(p) = Current squared(i²) x Resistance(R) d) All of these
28) If three resistors, R1=50.0 kOhm, R2=50.0 kOhm and R3=25.0 kOhm, are placed in
parallel, what resistor (Re) could be used to represent an equivalent resistance?
a) 41.7 kOhm b) 25.0 kOhm c) 12.5 kOhm d) 125.0 kOhm
29) What law is used when evaluating a circuit using the Node Voltage method?
a) Law of Superposition b) Kirchhoff's Current Law
c) Kirchhoff's Voltage Law d) Volta’s Law
30) What is Source Transformation?

4. 31) What is star connection?
32) What is delta Connection?
33) This circuit is .....?
a) Open b) Closed
c) Parallel d) shows the flow of electricity
34) A circuit is the path that electricity follows.
a) True b) False
35) Which of the following can supply energy in an electric circuit?
a) a conductor b) light bulb c) a wire d) a battery
36) What is the current through R1 and R2 in the following diagram?
37) What is the relation between impedance and admittance?
38) What is the relation between reactance and susceptance?
39) What is Inductive Susceptance and mention the unit of it.
40) What is Capacitive reactance and mention the unit of it.
41) Define Graph?
42) Define Tree?
43) Define Ohm’s Law.
44) What is the unit of admittance?
45) Define Basic tieset.
46) Define Basic cutest.
47) What is incidence matrix?
48) What is reduced incidence matrix?
49) What is the relation between frequency Vs capacitive reactance?
50) Draw the graph between frequency Vs inductive reactance?