$CATEGORY: Science - Khan Academy/13.Magnetic Effect of electric current/13.Magnetic Effect of electric current--Domestic Electric Circuits

//Multiple Choice

What happens in a circuit during an overload? {
    ~Resistance decreases
    =Excessive current flows
    ~Voltage drops to zero
    ~Circuit automatically stops
}

What device is commonly used to protect circuits from overload and short circuits? {
    ~Switch
    ~Bulb
    =Fuse
    ~Resistor
}

Short circuits are primarily caused by\: {
    =Low resistance path formation
    ~High voltage supply
    ~High resistance
    ~Absence of grounding
}

If a 5A fuse is used in a circuit and the current exceeds 5A, what will happen? {
    ~Nothing, the fuse will remain intact
    =The fuse will blow
    ~The fuse will increase its capacity
    ~None of the above
}

What is a common cause of electrical overload? {
    ~Low voltage
    ~High resistance
    =Too many devices connected
    ~Short circuit
}

What usually causes a short circuit? {
    ~High resistance
    =Low resistance path formation
    ~Low current flow
    ~Too many devices in a circuit
}

Which device is commonly used to protect a circuit from too much current? {
    ~Capacitor
    ~Resistor
    =Fuse
    ~Battery
}

If the voltage in a circuit increases above the rated value, it can cause\: {
    ~Decrease in current
    =Overload
    ~Low resistance
}

What happens to the current when there is low resistance in a circuit? {
    ~Current decreases
    ~Current stops flowing
    =Current increases
    ~Current remains the same
}

//True or False

Overloading occurs when too many appliances are connected to a single circuit. {T}

Short circuits typically have high resistance, causing low current flow. {F}

A fuse is used to allow continuous current flow, even during a fault. {F}

Overloading and short circuits can both cause a fire hazard in domestic circuits. {T}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Overload -> High current flow
=Short Circuit -> Low resistance path
=Fuse -> Protection from overload
=Ground wire -> Earthing
}


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