Physics concepts Electricity 1

What is the device called that is connected in series with a component to measure the current that flows through it?

• Ammeter

• Voltmeter

• Resistor

• Capacitor

What is the unit of current?

• Ampere (Amp)

• Volt (V)

• Ohm (Ω)

• Watt (W)

A (a)   is a material that allows electrical charge to flow easily

What is the unit of charge?

• Coulomb

• Newton

• Joule

• Watt

The sum of the currents entering a junction must always equal the sum of the currents leaving it, due to the conservation of charge.

• True

• False

A component that only allows current to flow through in the forward direction, with very large resistances in the reverse direction.

• Diode

• Resistor

• Capacitor

• Inductor

Fill in the blank: The green and yellow striped safety wire connected to metal casings, preventing an appliance from becoming live, is called the _________.

• Earth Wire

• Live Wire

• Neutral Wire

• Fuse Wire

The rate of flow of electrical charge is called _________.

• Electric Current

• Electric Potential

• Magnetic Field

• Resistance

What causes electrical heating in a metal?

• collisions between electrons and ions

• collisions between protons and ions

• the metal melting

• nobody knows, it just happens

What are the negatively charged particles that flow when a metal conducts electricity?

• Electrons

• Protons

• Neutrons

• Ions