11. ELECTRICITY MCQ’S-1

Who is associated with the name of the volt? Who is associated with the name of the volt?

1 Mark(s)

Alessandro Volta Alessandro Volta
Andre-Marie Ampere Andre-Marie Ampere
Georg Simon Ohm Georg Simon Ohm
James Joule James Joule

Which instrument measures electric current? Which instrument measures electric current?

1 Mark(s)

Ammeter Ammeter
Voltmeter Voltmeter
Rheostat Rheostat
Fuse Fuse

Approximately how many electrons have a total charge magnitude of one coulomb? Approximately how many electrons have a total charge magnitude of one coulomb?

1 Mark(s)

6 × 10⁶ electrons 6 × 10⁶ electrons
1.6 × 10⁻¹⁹ electrons 1.6 × 10⁻¹⁹ electrons
6 × 10¹² electrons 6 × 10¹² electrons
6 × 10¹⁸ electrons 6 × 10¹⁸ electrons

What is the relation between microampere and ampere? What is the relation between microampere and ampere?

1 Mark(s)

1 μA = 10⁻⁶ A 1 μA = 10⁻⁶ A
1 μA = 10⁻³ A 1 μA = 10⁻³ A
1 μA = 10⁶ A 1 μA = 10⁶ A
1 μA = 10³ A 1 μA = 10³ A

What is meant by electric current in a conductor? What is meant by electric current in a conductor?

1 Mark(s)

Flow of electric charge through the conductor
Storage of charge in the conductor Storage of charge in the conductor
Heating without charge flow Heating without charge flow
A collection of stationary atoms A collection of stationary atoms

What is the water-flow analogy for potential difference? What is the water-flow analogy for potential difference?

1 Mark(s)

Pressure difference between two ends of a tube
Temperature difference inside a tank Temperature difference inside a tank
Mass difference between two pipes Mass difference between two pipes
Colour difference between water streams Colour difference between water streams

What is the relation between milliampere and ampere? What is the relation between milliampere and ampere?

1 Mark(s)

1 mA = 10³ A 1 mA = 10³ A
1 mA = 10⁻⁶ A 1 mA = 10⁻⁶ A
1 mA = 10⁻³ A 1 mA = 10⁻³ A
1 mA = 10⁶ A 1 mA = 10⁶ A

What is the conventional direction of current relative to electron flow? What is the conventional direction of current relative to electron flow?

1 Mark(s)

The same as electron flow The same as electron flow
At right angles to electron flow At right angles to electron flow
It has no defined direction It has no defined direction
Opposite to electron flow Opposite to electron flow

A current of 0.5 A flows for 10 minutes. What charge passes? A current of 0.5 A flows for 10 minutes. What charge passes?

1 Mark(s)

300 C 300 C
30 C 30 C
3000 C 3000 C
0.05 C 0.05 C

What happens when a circuit is broken anywhere? What happens when a circuit is broken anywhere?

1 Mark(s)

The current doubles The current doubles
The bulb becomes brighter The bulb becomes brighter
The current stops and the bulb does not glow
The resistance becomes zero The resistance becomes zero

What is the SI unit of electric current? What is the SI unit of electric current?

1 Mark(s)

Ampere (A) Ampere (A)
Coulomb (C) Coulomb (C)
Volt (V) Volt (V)
Ohm (Ω) Ohm (Ω)

Which scientist gave the name associated with the SI unit ampere? Which scientist gave the name associated with the SI unit ampere?

1 Mark(s)

Andre-Marie Ampere Andre-Marie Ampere
Alessandro Volta Alessandro Volta
Georg Simon Ohm Georg Simon Ohm
James Joule James Joule

Which equation represents potential difference? Which equation represents potential difference?

1 Mark(s)

V = WQ V = WQ
V = W/Q V = W/Q
V = Q/W V = Q/W
V = W + Q V = W + Q

What does a cell expend to maintain current in a given circuit? What does a cell expend to maintain current in a given circuit?

1 Mark(s)

Its stored chemical energy Its stored chemical energy
Its copper content Its copper content
Its resistance Its resistance
Its magnetic field only Its magnetic field only

What is an electric circuit? What is an electric circuit?

1 Mark(s)

A broken path containing a cell A broken path containing a cell
A continuous and closed path for electric current
A wire carrying no charge A wire carrying no charge
Only a collection of resistors Only a collection of resistors

Which particles constitute the flow of charges in metallic wires? Which particles constitute the flow of charges in metallic wires?

1 Mark(s)

Protons Protons
Electrons Electrons
Neutrons Neutrons
Positive ions only Positive ions only

What is the magnitude of the charge of one electron given in the chapter? What is the magnitude of the charge of one electron given in the chapter?

1 Mark(s)

1.6 × 10⁻¹⁹ C 1.6 × 10⁻¹⁹ C
1.6 × 10¹⁹ C 1.6 × 10¹⁹ C
6 × 10⁻¹⁸ C 6 × 10⁻¹⁸ C
9.8 × 10⁻¹⁹ C 9.8 × 10⁻¹⁹ C

One volt is equivalent to what? One volt is equivalent to what?

1 Mark(s)

One coulomb per joule One coulomb per joule
One joule per coulomb One joule per coulomb
One ampere per second One ampere per second
One ohm per volt One ohm per volt

One ampere corresponds to the flow of how much charge per second? One ampere corresponds to the flow of how much charge per second?

1 Mark(s)

One volt per second One volt per second
One joule per second One joule per second
One ohm per second One ohm per second
One coulomb per second One coulomb per second

In the schematic circuit described in the chapter, conventional current flows from which terminal of the cell? In the schematic circuit described in the chapter, conventional current flows from which terminal of the cell?

1 Mark(s)

Negative terminal to positive terminal Negative terminal to positive terminal
Positive terminal to negative terminal Positive terminal to negative terminal
Both terminals simultaneously Both terminals simultaneously
Only through the negative terminal Only through the negative terminal

What produces potential difference across the terminals of a cell? What produces potential difference across the terminals of a cell?

1 Mark(s)

The ammeter The ammeter
The connecting wire The connecting wire
The bulb filament The bulb filament
Chemical action within the cell Chemical action within the cell

How is an ammeter connected to measure current through a circuit element? How is an ammeter connected to measure current through a circuit element?

1 Mark(s)

In parallel In parallel
Across an open switch only Across an open switch only
Outside the circuit Outside the circuit
In series In series

What is the SI unit of potential difference? What is the SI unit of potential difference?

1 Mark(s)

Volt (V) Volt (V)
Ampere (A) Ampere (A)
Coulomb (C) Coulomb (C)
Ohm (Ω) Ohm (Ω)

Potential difference between two points is defined as what? Potential difference between two points is defined as what?

1 Mark(s)

Charge moved per unit time Charge moved per unit time
Work done to move a unit charge from one point to the other
Resistance multiplied by length Resistance multiplied by length
Current per unit area Current per unit area

What makes charges flow in a conducting metallic wire? What makes charges flow in a conducting metallic wire?

1 Mark(s)

Gravity acting on electrons Gravity acting on electrons
The wire's colour The wire's colour
A potential difference along the conductor
Only the presence of atoms Only the presence of atoms

What does a switch do in a simple torch circuit? What does a switch do in a simple torch circuit?

1 Mark(s)

Makes or breaks the conducting link Makes or breaks the conducting link
Measures current Measures current
Measures resistance Measures resistance
Stores electrical energy Stores electrical energy

If charge Q crosses a conductor in time t, which expression gives current? If charge Q crosses a conductor in time t, which expression gives current?

1 Mark(s)

I = Q/t I = Q/t
I = Qt I = Qt
I = t/Q I = t/Q
I = Q + t I = Q + t

Which device provides the flow of charges in a torch circuit? Which device provides the flow of charges in a torch circuit?

1 Mark(s)

An ammeter An ammeter
A cell or battery A cell or battery
A voltmeter A voltmeter
A fuse A fuse

Electric current is the rate of flow of what quantity? Electric current is the rate of flow of what quantity?

1 Mark(s)

Electrical resistance Electrical resistance
Electrical power Electrical power
Potential difference Potential difference
Electric charge Electric charge

Can a cell have potential difference across its terminals when no current is drawn? Can a cell have potential difference across its terminals when no current is drawn?

1 Mark(s)

No No
Only when a bulb glows Only when a bulb glows
Only when an ammeter is connected Only when an ammeter is connected
Yes Yes

11. ELECTRICITY MCQ’S-1 : Question 1 of 30