Flow of ELectricity
When connected into a circuit, the negative terminal of a cell, battery or power supply pushes _____ around in the wires.
A. protons
B. electrons
C. neutrons
D. atoms
B. electrons
When electric current is passed through the filament of bulb, it gives off
A. sound and heat
B. heat and magnetism
C. heat and light
D. light and sound
C. heat and light
The red terminal of ammeter must be connected to ... while the black terminal must be connected to ... of power supply or battery.
positive terminal , negative terminal
Which of these materials could not be used to make electric wires?
A. Cotton
B. Steel
C. Aluminium
D. Copper
A. Cotton
When the electron flow faster in a circuit, the current is...
A. smaller
B. same
C. greater
D. do not flow
C. greater
The flow of electrons in the circuit is called ____
A. current
B. circuit
C. component
D. light
A. current
Which of the statements below is not the reason why we use circuit diagram and circuit symbol?
A. There are different types of electrical components. Standard symbols make it simple
B. It is easier to draw the real component rather than to draw the symbol
C. Wires are drawn with straight lines, which is easy to interpret
D. Not everyone can draw electrical component distinctively
B. It is easier to draw the real component rather than to draw the symbol
Which is the correct option for the given statement A and statement B.
Statement A: The current flowing through each bulb is the same when connected in series
Statement B: The voltage drop across each bulb remains the same when connected in parallel.
Statement A and B both are correct
In insulators, the electrons are ............... to move. Insulators ........ electron flow.
A. not free, allow
B. free, inhibit
C. free, allow
D. not free, inhibit
D. not free, inhibit
Which of these components will decrease the current when added in series?
A. another identical cell
B. another identical lamp
C. another iddentical ammeter
D. anotther identical switch
B. another identical lamp
Opposite charges___, and like charges ___.
A. attract, push
B. repel, attract
C. attract, repel
D. repel, push
C. attract, repel
The open circuit is a circuit in which the flow of current is
A. continuous
B. steady
C. fast
D. zero
D. zero
The current which flows through each component of a series circuit is
A. same
B. different
C. greater
D. lower
A. same
Ahmed investigates the electrical conductivity of three metals, X, Y and Z as the wire of a circuit.
When the wire is made of metal X and Y, the bulb on the circuit is dimmer.
When the wire is made of metal Z, the bulb on the circuit is brighter.
Which metal is the best conductor?
Metal Z
Which component will increase the current when added correctly into a series circuit?
A. cell
B. lamp
C. buzzer
D. switch
A. cell
Electric current flows from
A. detect electric current
B. negative terminal to positive terminal
C. positive terminal to negative terminal
D. the flow rate of electric charges through a conductor
C. positive terminal to negative terminal
Why are symbols used for electronic components?
A. it makes it easier to draw the circuit diagrams
B. it is essential to draw the circuit diagrams
C. it helps to show the direction of flow of current in a circuit
D. it makes it hard to draw the circuit
A. it makes it easier to draw the circuit diagrams
How should you connect the ammeter in a circuit ?
A. in parallel with other electrical components
B. replace all the lamps in circuit with ammeter
C. anywhere in mix combination parallel and series with other components.
D. anywhere in series with other electrical components
D. anywhere in series with other electrical components
Why the brightness of the lamp is different on metal X and metal Y and Z?
A. Because metal X is an insulator.
B. Because of the electrical current through metal Z bigger than in metal X and Y.
C. Because metal X is cheaper than metal Y and Z.
D. Because metal X and Y has a lower resistance than metal Z.
B. Because of the electrical current through metal Z bigger than in metal X and Y.
The bulb glows only when ................. flows through it.
A. light
B. current
C. resistance
D. ampere
B. current