DC Circuit - MCQTrip

Test your knowledge of DC Circuits, including, Ohm’s law, resistance, voltage, current, charges, units of measurements, electric networks, power, etc. with this online MCQ quiz by MCQ Trip. See how well you understand the basics of AC and DC machines and challenge yourself to get the highest score. Twenty (20) MCQ questions from our test bank will be randomly shown for every attempt. Passing mark for this test is 70%.

Objectives: To provide an online quiz to test knowledge of DC circuits and to provide an opportunity to learn more about the basics of DC circuits

Welcome to your DC Circuits MCQ practice assessment.

Which of the following material has nearly zero temperature coefficient of resistance

Porcelain

Manganin

Copper

Carbon

In a circuit a 33 ohms resistor carries a current of 2 A. The voltage across the resistor is

33 V

66 v

80 V

132 V

The resistance of wire varies inversely as

temperature

area of cross section

length

resistivity

Which of the following materials has a negative temperature coefficient of resistance?

Carbon

Brass

Aluminum

Copper

The curve representing ohm's law is

parabolic

linear

cyclic

constant

A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is

6.4 A, 9.6 A

4.6 A, 9.6 A

4.6 A, 6.9 A

6.4 A, 6.9 A

The substances which have a large number of free electrons and offer a low resistance are called

insulators

inductors

conductors

semi-conductors

The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?

18 ohms

48 ohms

36 ohms

64 ohms

With rise in temperature the resistance of pure metals

first increases and then decreases

remains constant

decreases

increases

You have to replace 1500 ohms resistor in radio. You have no 1500 ohms resistor but have several 1000 ohms ones which you would connect

two in parallel

three in parallel

two in parallel and one in series

three in series

Specific resistance of a material is

Inversely proportional to the both area of cross section and length of material

Directly proportional to the area of cross section and inversely proportional to the length of material

Directly proportional to the both area of cross section and length of material

Inversely proportional to the area of cross section and directly proportional to the length of material

Electrical appliances are not connected in series because

Appliances have different current ratings

Resistances are different

Power loss is more

Series circuit is complicated

Insulating materials have the function of

storing very high currents

conducting very large currents

preventing an open circuit between the voltage source and the load

) preventing a short circuit between conducting wires

The property of a conductor due to which it passes current is called

reluctance

resistance

conductance

inductance

A DC circuit has ___________ as a load

Resistance

Capacitance and Inductance

Capacitance

Inductance

According to Kirchoff’s voltage law,

Algebraic sum of e.m.f’s plus algebraic sum of voltage drops is equal to zero

Algebraic sum all the voltage drops in the circuit is zero

The algebraic sum of all the e.m.f’s in the circuit is zero

The algebraic sum of all the e.m.f’s in the circuit is infinity

A resistance having rating 10 ohms, 10 W is likely to be a

variable resistor

wire wound resistor

metallic resistor

carbon resistor

One coulomb of charge is equal to the charge of

1.095 x 10 exp–19 electrons

6.025 x 10 exp–19 electrons

1.625 x 10 exp–31 electrons

6.242 x 10 exp 18 electrons

Two resistors are said to be connected in series when

sum of IR drops equals the applied e.m.f.

total current equals the sum of branch currents

same current passes in turn through both

both carry the same value of current

The purpose of load in an electric circuit is to

Utilize electrical energy

Decrease the circuit current

Increase electrical energy

Increase the circuit current