ohms law and circuits

Front

What unit is used to measure voltage?

Back

Volts

Front

What is the formula to calculate current (I) in a circuit?

Back

I = P/V, where P is power in watts and V is voltage in volts.

Front

What is the total resistance in a series circuit?

Back

The total resistance (Rt) is the sum of all individual resistances: Rt = R1 + R2 + R3 + ...

Front

If a circuit has a total resistance of 25.7 ohms, what does this indicate about the flow of current?

Back

A lower resistance allows more current to flow for a given voltage according to Ohm's Law.

Front

What is Ohm's Law?

Back

Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance.

Front

What happens to the current in a series circuit if one component fails?

Back

If one component fails, the current stops flowing through the entire circuit.

Front

What is the total resistance of the following resistors in series: R1 = 27 ohms, R2 = 33 ohms, R3 = 51 ohms, R4 = 1.2 kohms, R5 = 240 ohms?

Back

The total resistance is 1551 ohms.

Front

What is the current drawn by a 1000 W electric bulb connected to a 220 V source?

Back

The current drawn is 4.55 A.

Front

What is the difference between series and parallel circuits?

Back

In series circuits, components are connected end-to-end, while in parallel circuits, components are connected across common points.

Front

What is the effect of increasing resistance on current in a circuit?

Back

Increasing resistance decreases the current for a given voltage according to Ohm's Law.