Electricity Summative

Front

What happens to two electrically neutral metal spheres when a negatively charged rod is brought near them?

Back

One sphere becomes positively charged and the other becomes negatively charged due to induction.

Front

What is the unit of electric current?

Back

Ampere (A) is the unit of electric current.

Front

What is a parallel circuit?

Back

A parallel circuit is a type of electrical circuit where the components are connected across common points or junctions, providing multiple paths for current.

Front

How do you calculate resistance using Ohm's Law?

Back

Resistance (R) can be calculated using the formula R = V/I, where V is voltage and I is current.

Front

What is the formula to calculate voltage?

Back

Voltage (V) can be calculated using the formula V = I × R, where I is current and R is resistance.

Front

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

Back

Ohm's Law states that V = I × R, indicating that voltage is directly proportional to the product of current and resistance.

Front

What is the potential difference across a resistor?

Back

The potential difference (voltage) across a resistor is the amount of energy per unit charge required to move charge through the resistor.

Front

What is the effect of increasing resistance in a circuit?

Back

Increasing resistance in a circuit decreases the current, assuming voltage remains constant.

Front

What is the total current in a parallel circuit?

Back

In a parallel circuit, the total current is the sum of the currents through each parallel branch.

Front

What is the significance of a 12-volt battery in a circuit?

Back

A 12-volt battery provides a potential difference of 12 volts, which drives the current through the circuit.