A 'loudspeaker' receives

  • strong waves of sound
  • strong resistance from source
  • strong electrical signals
  • strong voltage

The higher the voltage, the more

  • force to each electron
  • power to each proton
  • energy to each proton
  • energy to each electron

If we add a fuse of 13A in a hair drier that requires a current of 2A, the current will cause

  • overheating only
  • melting of wires
  • glowing of wires
  • a lot of damage which may result in fire

Resistors are of

  • one kind
  • two kinds
  • three kinds
  • four kinds

The starting point of manufacturing a product which contains sodium or chlorine is

  • sodium chloride
  • sodium metal
  • chlorine gas
  • chlorine sodiumide

Wires are heated when they carry

  • electrons
  • protons
  • ions
  • photons

Variable resistors can be used to

  • dim the light
  • change the color of light
  • change the position of light
  • change the properties of light

If we have two values, consumed electrical energy can be found. First, the period of use of appliance and second, the

  • resistance of appliance
  • length of wire of appliance
  • power of the appliance
  • mass of the appliance

Metal ions move through the electrolyte to coat the object which is

  • nematode
  • posit rode
  • anode
  • cathode

'Electricity' can

  • facilitate us
  • make us lean
  • make us fat
  • relax us

Besides heat and light, electricity is also used in

  • decaying
  • vaporizing
  • crushing
  • decomposing

Compared to short thin wire of silver, the long but thin wire would have

  • more resistivity
  • less resistivity
  • equal resistivity
  • no resistivity

If two cells are connected in series, the bulb will glow more

  • brightly
  • dimly
  • sharply
  • colorfully

Electroplating is used for objects which are likely to

  • corrode
  • get dull
  • get weak
  • get corrosive

Neutral wire is a wire which has

  • voltage
  • current
  • no current or voltage
  • both current and voltage

The name of English scientist who invented first practical motor is

  • Isaac Newton
  • Thomas Silva Edison
  • William Sturgeon
  • Vander Waal

To measure the current, ammeter is connected in

  • parallel
  • series
  • both a and b
  • an electric circuit

The more appliances in a parallel circuit,

  • the less current in the circuit
  • the more current in the circuit
  • the less voltage in the circuit
  • the more voltage in the circuit

The presence of earth wire can reduce the danger of

  • overloading
  • overheating
  • fire
  • shock

If two bulbs are attached in parallel circuit, they would glow

  • brightly
  • dimly
  • equally
  • continuously

The electricity passes through

  • pipeline
  • electricity meter
  • power house
  • generator

One kilowatt is equal to

  • 10 watts
  • 100 watts
  • 1000 watts
  • 0.1 watts

Small magnets are used in

  • switches
  • plugs
  • electric bells
  • fuses

In most of the loudspeakers, electrical signals pass through a

  • magnet
  • wire coil
  • spring
  • resistor

'Electromagnet' can be made stronger by increasing

  • the current in coil
  • the voltage in coil
  • the resistance of coil
  • the thickness of coil

The filament bulb glows, when it reaches the temperature of

  • 1000 °C
  • 1100 °C
  • 1200 °C
  • 1300 °C

For the current to flow, each resistor in parallel circuit provides

  • alternate route
  • same route
  • parallel route
  • perpendicular route

To remove a steel splinter from a patient's eye, the surgeon may use

  • clips
  • electric current
  • coils
  • electromagnets

Each component of circuit is shown by a particular

  • alphabet
  • symbol
  • digit
  • script

Another example of a good electric conductor is

  • gold
  • copper
  • steel
  • plastic
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