Physical Science Final Exam

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) of the conductor. It can be expressed as V = I × R.

Front

How do you calculate power in a circuit?

Back

Power (P) in a circuit can be calculated using the formula P = W/t, where W is the work done (in joules) and t is the time (in seconds). It can also be calculated using P = V × I, where V is voltage and I is current.

Front

What is the unit of electrical resistance?

Back

The unit of electrical resistance is the ohm (Ω).

Front

What is the relationship between current, voltage, and resistance in a circuit?

Back

The relationship is defined by Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.

Front

What type of bond forms between a metal and a non-metal?

Back

An ionic bond forms between a metal and a non-metal, where electrons are transferred from the metal to the non-metal.

Front

What is the formula for calculating the tension in a string connected to masses?

Back

The tension in a string can be calculated using Newton's second law: T = m × a, where T is tension, m is the mass being pulled, and a is the acceleration.

Front

What is a magnetic domain?

Back

A magnetic domain is a region within a magnetic material where the magnetic moments of atoms are aligned in the same direction.

Front

What is the difference between a magnetic and a non-magnetic material?

Back

Magnetic materials have aligned magnetic domains, while non-magnetic materials have randomly oriented domains or no domains at all.

Front

How do you determine the 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 voltage in a circuit?

Back

Voltage (V) can be calculated using Ohm's Law: V = I × R, where I is current and R is resistance.