Test: Current And Voltage

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Description

This mock test of Test: Current And Voltage for UPSC helps you for every UPSC entrance exam. This contains 5 Multiple Choice Questions for UPSC Test: Current And Voltage (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Current And Voltage quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Test: Current And Voltage exercise for a better result in the exam. You can find other Test: Current And Voltage extra questions, long questions & short questions for UPSC on EduRev as well by searching above.

QUESTION: 1

A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it ?

A.
180 C
B.
182 C
C.
200 C
D.
300 C

Solution:

The correct option is A.
Current (I)= 0.20 A
Time(t)= 15 min

t= 15 × 60= 900 seconds
[1 minute= 60 seconds]

We know that,
I = Q/t

0.20 = Q/900
Q= 0.20 × 900
Q= 180 C
Hence, the amount of electric charge that flows through the circuit is 180 coulombs.

QUESTION: 2

Conventional direction of electric current is from

A.
Lower potential to higher potential
B.
Higher resistance to lower resistance
C.
Positive to negative terminal
D.
Negative to positive terminal

Solution:

The flow of electrons is termed electron current. Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative.

QUESTION: 3

The symbol used for representing Independent sources

A.
Diamond
B.
Square
C.
Circle
D.
Triangle

Solution:

Independent sources are represented by circle
Dependent sources are represented by Diamond.

QUESTION: 4

How much work is done, when 1 coulomb of charge moves against a potential difference of 1 volt ?

A.
1 joule
B.
2 joule
C.
0.5 joule
D.
1.5 joule

Solution:

Charge moved, Q = 1 C
Potential differnce, V = 1V
Therefore,
Work done, W = QV
= 1 C x 1 V
= 1 joule.

QUESTION: 5

The opposing capacity of materials against the current flow is

A.
Conductance
B.
Inductance
C.
Susceptance
D.
Resistance

Solution:

The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.

Resistance in a conductor can be defined as the opposition offered to the flow of electrons. For a conductor of uniform cross-sectional area resistance is directly proportional to the length of the conductor and inversely proportional to the cross-sectional area of the conductor.