Front

What is voltage?

Back

Voltage is the electric potential difference between two points in a circuit, measured in volts (V). It represents the energy per unit charge available to move electrons.

Front

What happens to the charge of an object when it is grounded?

Back

When an object is grounded, it allows excess charge to flow to the ground, resulting in a net charge of zero.

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current, measured in ohms (Ω). It determines how much current will flow for a given voltage.

Front

What is a conductor?

Back

A conductor is a material that allows electrons to flow through it easily, such as metals like copper and aluminum.

Front

What is an insulator?

Back

An insulator is a material that resists the flow of electric current, such as rubber, glass, or plastic.

Front

What is a semiconductor?

Back

A semiconductor is a material that has conductivity between that of a conductor and an insulator, often used in electronic devices.

Front

What is the angle of incidence?

Back

The angle of incidence is the angle between the incoming ray and the normal (a line perpendicular to the surface) at the point of incidence.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It is expressed as V = I × R.

Front

What is the formula for calculating total resistance in a series circuit?

Back

In a series circuit, the total resistance (R_total) is the sum of all individual resistances: R_total = R1 + R2 + R3 + ...

Front

What is the formula for calculating total resistance in a parallel circuit?

Back

In a parallel circuit, the total resistance (R_total) can be calculated using the formula: 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...