These multiple choice questions MCQ like ‘An Ampere Is A Unit Of Electrical ____’, test your understanding of the Science Chapter. The concepts being tested are about Flow of electrons in a conductor, electric current, potential, resistance, voltage, Ohm’s Law, Heat generated by electric current, resistances in series and parallel combinations, etc.

## An Ampere Is A Unit Of Electrical Current

01.

__________ is a flow of electrons in a conductor or amount of charge flowing through

a particular cross-sectional area in unit time

02.

True or False: Free Electrons move Randomly in all directions in a conductor with

no potential difference

03.

Name the following: A continuous path consisting of conducting wires and other resistances

between terminals pf a battery, along which an electric current flows.

04.

Fill in the Blank: If one coulomb (C) of charge is passing through any cross-section

of a conductor in one second (s), then the amount of current flowing through it

is ______________

05.

True or False: Electric Potential is the electric level at a particular point. The

current will flow, if there is potential difference

06.

The_________ between two points in an electric field is defined as the amount of

work done in moving a unit positive charge from one point to another.

(a) Charge

(b) Potential Difference

(c) Resistance

(d) Capacitance

07.

True or False: (1 J) = (1 V) x (1 C)

08.

The potential difference between two points is said to be_____, if 1 Joule of work

is done in moving 1 Coulomb of electric charge from one point to another

(a) 1 milliVolt

(b) 1 megaVolt

(c) 1 kiloVolt

(d) 1 Volt

09.

Name the following: Electric Discharge which moves from Sky (about 10,000,000 Volts)

to Ground at Zero Potential

10.

True or False: The direction of electric current is considered opposite to the directions

of electron flow

11.

Charge of an electron (e) = _____ C

(a) 1.6 x 10^{-11}

(b) 3.2 x 10^{-19}

(c) 1.9 x 10^{-16}

(d) 1.6 x 10^{-19}

12.

The property of the conductor due to which it opposes flow of current is called

_____

(a) Resistance

(b) Impedance

(c) Inductance

(d) Capacitance

13.

1 Volt = ________

(a) 1 milliVolt

(b) 1000 milliVolt

(c) 0.1 kiloVolt

(d) 1 microVolt

14.

Ohm’s Law can mathematically be stated as: (Symbols have their usual meanings)

(a) C = I x A

(b) A = I x V

(c) R = I x C

(d) V = I x R

15.

Fill in the Blank: ________________ of a conductor is defined as the resistance

of a conductor of unit length and unit cross-sectional area

16.

Name the following: A diagram which indicates how different components in a circuit

have been connected by using the electrical symbols for the components.

17.

If 2 Ampere current flows through the conductor when 15 Volt potential difference

is applied across it, the its resistance is ____ Ohm

(a) 30

(b) 5

(c) 7.5

(d) 1

18.

True or False: Resistivity depends on the geometry of the conductor metal

19.

1 Ampere = ________

(a) 100 milliAmp

(b) 1000 milliAmp

(c) 0.01 kiloAmp

(d) 100 microAmp

20.

True or False: SI unit of Resistivity is ohm-metre (O-m)

21.

Effective Resistance of resistors in Parallel is ________ of all resistors

(a) Less than Maximum

(b) Less than Least

(c) More than Maximum

(d) More than Least

22.

The quantity of heat (H) generated in a conductor of Resistance (R), when a current

(I) flows through it for the time (t), depends on

(a) Current (I)

(b) Resistance of conductor (R)

(c) Time for which current flows (t)

(d) All of the above

23.

Name the following: A piece of wire, made of alloy of low melting point (like lead

& tin), which if current exceed the rated value (1A, 2A, 3A, 4A, 5A or 10A), the

temperature melts the wire and circuit is broken

24.

True or False: For resistors in Parallel, total voltage drop across all resistors

is equal to sum of voltage drops across each resistors

25.

True or False: Resistivity of iron is more than that of Silver

26.

Resistivity of Ebonite is ______ (O-m)

(a) 10^{-8}to 10^{-6}

(b) 10^{3}to 10^{5}

(c) 10^{7}to 10^{8}

(d) 10^{15}to 10^{17}

27.

Effective Resistance of resistors in Series is ________ of all resistors

(a) Less than Maximum

(b) Less than Minimum

(c) More than Maximum

(d) More than Minimum

28.

Find Odd one out: Bulb Filament

Fuse in electric circuit

Electric Iron

Speaker

29.

Fill in the Blank: ___________ is defined as the rate at which electrical energy

is consumed

30.

True or False: For resistors in Parallel, sum of reciprocals of all resistances

is equal to reciprocal of Effective resistance

### Answers to An Ampere Is A Unit Of Electrical _____

01. Electric Current

02. True

03. Circuit

04. 1 Ampere (A)

05. True

06. (b) Potential Difference

07. True

08. (d) 1 Volt

09. Lightening

10. True

11. (d) 1.6 x 10^{-19}

12. (a) Resistance

13. (b) 1000 milliVolt

14. (d) V = I x R

15. Resistivity

16. Circuit Diagram

17. (c) 7.5

18. False { Resistivity is the characteristic property of a material }

19. (b) 1000 milliAmp

20. True

21. (b) Less than Least

22. (d) All of the above

23. Fuse

24. False { This is true for Series }

25. True

26. (d) 10^{15}to 10^{17}

27. (c) More than Maximum

28. Speaker { Rest all are appliances based on heating effect of electric current}

29. Electric Power

30. True

These multiple choice questions like An Ampere Is A Unit Of Electrical _____, helps a student to deeply grasp the basic concepts. It answers many questions like, how heat is generated on current flow; how resistances restricts the current; how effective resistance can be manipulated by changing the configuration of individual resistances, etc. So please try to attempt these An Ampere Is A Unit Of Electrical.

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