5I - Power - Physics

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

What is the formula for calculating power in an electrical circuit?

Back

Power (P) in an electrical circuit can be calculated using the formula P = V × I, where P is power in watts, V is voltage in volts, and I is current in amperes.

Front

What happens to current when resistance increases while voltage remains constant?

Back

The current decreases when resistance increases while voltage remains constant, according to Ohm's Law.

Front

What is the unit of electrical resistance?

Back

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

Front

How do you calculate 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

How do you calculate the 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 + ...

Front

What is the relationship between voltage, current, and resistance?

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 is the effect of increasing voltage on current in a circuit with constant resistance?

Back

If voltage increases while resistance remains constant, the current will also increase, according to Ohm's Law.

Front

What is a series circuit?

Back

A series circuit is a type of electrical circuit in which components are connected end-to-end, so that the current flows through each component sequentially.

Front

What is a parallel circuit?

Back

A parallel circuit is a type of electrical circuit in which components are connected across the same voltage source, allowing current to flow through multiple paths.