IGSCE_ Electricity

Multiple Choice

Name the component labelled A.

• closed switch

• fuse

• open switch

• resistor

Multiple Choice

Name the component labelled B.

• closed switch

• fuse

• open switch

• resistor

Multiple Choice

Name the component labelled C.

• battery

• earth

• electric cell

• variable resistor

Multiple Choice

Name the component labelled D.

• battery

• earth

• electric cell

• variable resistor

Multiple Choice

Name the component labelled E.

• ammeter

• fuse

• lamp

• resistor

Multiple Choice

Name the component labelled F.

• ammeter

• fuse

• lamp

• resistor

Multiple Choice

Name the component labelled F.

• ammeter

• fuse

• lamp

• resistor

Fill in the Blanks

Fill in the Blanks

Multiple Choice

Name the component labelled J.

• velocity-meter

• voltagemeter

• voltmeter

• variablemeter

Multiple Choice

Which shows the correct position of the electric cell?

Multiple Choice

what is this symbol for?

• diode

• toggle switch

• battery

• LED

Multiple Choice

Name this component:

• Ampere

• Switch

• Bulb

• Battery

Multiple Choice

_________ are used in drawing circuits instead of drawing pictures.

• Symbols

• Marks

Multiple Choice

The diagram shows current going into and out of a junction. Find the magnitude of the current $$I$$  .

• 4V

• 4A

• 6A

• 6V

Multiple Choice

This is an example of a _______ circuit

• open
• series
• parallel
• square

Multiple Choice

This is an example of a ______ circuit

• Series
• Parallel
• Open
• Dihexihedral

Multiple Choice

The potential difference across the 300 ohm resistor is

• 6 V

• 9 V

• 2 V

• 30 V

Multiple Choice

In parallel circuits potential difference across the whole circuit is equal to sum of potential difference across each component

• true

• False because in parallel circuit P.D across each component is equal to the P.D across the whole circuit

Multiple Choice

In a parallel circuit the current flowing into or out of the parallel branches is equal to the sum of the individual current in each of the parallel branches.

• false

• true

Multiple Choice

What happens to other bulbs if one of the bulbs blows?

• they will glow brighter

• they will stop working because the circuit will be broken

• they will explode

• they will keep glowing with the same brightness

Multiple Choice

What happens to other bulbs in the circuit, if one of the bulbs blows?

• they will glow brighter

• they will stop working because the circuit will be broken

• they will explode

• they will keep glowing with the same brightness

Multiple Choice

Which of the following is true?

• all bulbs are lit equally

• the two top bulbs are brighter

• the single lower bulb is brighter

• the single bulb does not light and the other two are dim

Multiple Choice

A₁, A_{2 and} A_{3 are the readings of the ammeters in the circuit. which of the following is true?}

• A₂ = A₃

• A₂ + A₃ = A₁

• A₁ + A₂ = A₃

• A₄ = A₂ - A₃

Multiple Choice

Two cells of equal emf and 4 bulbs of equal resistance are arranged in two circuits. Which of the following statements is true?

• Bulbs in Circuit X are brighter than circuit Y

• Bulbs in Circuit Y are brighter than circuit X

• bulbs in Both circuits have the same brightness

• Neither circuit will light the bulbs

Multiple Choice

Two cells of equal emf and 4 bulbs of equal resistance are arranged in two circuits. Which cell will used up faster?

• cell in circuit X

• Cell in circuit Y

Multiple Choice

Find the effective resistance

• 0.6 kilo ohms

• 1.7 kilo ohms

• 0.75 kilo ohms

• 1.3 kilo ohms

Multiple Choice

Find the effective resistance

• 3.1 ohms

• 7.5 ohms

• 0.13 ohms

• 7.6 ohms

Multiple Choice

Find the effective resistance

• 3.2 ohms

• 2.8 ohms

• 4.5 ohms

• 7 ohms

Multiple Choice

Find the effective resistance

• 14.8 ohms

• 10 ohms

• 5 ohms

• 7.4 ohms

Multiple Choice

The current going through the 45 ohm resistor is 

• 0.05 amps
• 0.2 amps
• 0.1 amps
• 5 amps

If the supply voltage is 9V, what is the value of emf?

Multiple Choice

What is a potential divider?

• A battery that stores electrical energy

• A device that increases current in a circuit

• A series of resistors used to divide voltage

• A type of fuse used for circuit protection

Multiple Choice

Why are potential dividers used in electronic circuits?

• To increase electrical power

• To adjust the resistance in a circuit

• To store electrical energy

• To adjust voltage from a power source

Multiple Choice

Which of the following devices might use a potential divider?

• Vacuum cleaner

• Stereo system

• Washing machine motor

• Circuit breaker

Multiple Choice

What is a variable potential divider used for?

• To reduce electrical noise

• To stabilize current flow

• To vary output voltage

• To store charge

Multiple Choice

How is a potential divider typically constructed?

• With one large capacitor

• With transistors in parallel

• With resistors in series

• With diodes in a loop

Open Ended

What do you think about conductor?

Poll

All metals are a conductor

• True

• False

Open Ended

What do you think about insulator?

Poll

Wool is an insulator

• True

• False