ELectricity ----- ARYan - I

What does an ammeter measure?

• Voltage across a component.
• Electric charge stored in a capacitor.
• Rate of flow of electric charge in a circuit.
• Energy consumed by a resistor.

Which type of current periodically changes its direction?

• Conventional current (d.c.)
• Static current
• Alternating current (a.c.)
• Electromagnetic current

What is needed for an electric current to flow?

• A complete circuit and a battery or power supply.
• A closed switch and a resistor.
• A conductor and an insulator.
• An open circuit and a capacitor.

What is the SI unit of electric current?

• Amperes (A)
• Volts (V)
• Ohms (Ω)
• Watts (W)

How is electric current measured?

• By a voltmeter.
• By an ammeter.
• By a resistor.
• By an oscilloscope.

What is the role of conduction electrons in metals?

• They provide insulation.
• They generate light.
• They carry electric current.
• They block current flow.

What is electric current?

• Flow of electrons.
• Flow of protons.
• Movement of energy.
• Flow of charge.

How did the changes in Kerala impact village planning and development?

• Reduced emphasis on water supply schemes.
• Shifted focus from education to agriculture.
• Enabled proper planning for various needs including water, food, and education.
• Decreased attention on health centers.

Does anything get used up going around a circuit? What do batteries and cells have that gets used up?

• Electric charge.
• Voltage.
• Energy.
• Current.

Why can birds stand on power lines without being electrocuted?

• Birds are insulators.
• Birds are not grounded.
• Birds have a higher resistance.
• Birds have rubber feet.