IB Physics Topics B.5, D.2 and D.3

Front

What is the electric field due to a negatively charged conducting sphere?

Back

The electric field lines point towards the sphere, indicating that it attracts positive charges and repels negative charges.

Front

What direction does the current flow in a wire that creates a magnetic field around itself?

Back

The current flows in the opposite direction to the magnetic field lines.

Front

How does the strength of magnetism change with distance between magnets?

Back

The force of magnetism is stronger when magnets are closer together.

Front

What is the significance of an ammeter's internal resistance in a circuit?

Back

An ammeter with negligible internal resistance ensures accurate current readings without affecting the circuit.

Front

How do you calculate the current through a resistor using Ohm's Law?

Back

Current (I) = Voltage (V) / Resistance (R).

Front

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

Back

Current is directly proportional to voltage; as voltage increases, current increases.

Front

What happens to the electric field inside a conductor in electrostatic equilibrium?

Back

The electric field inside a conductor is zero.

Front

What is the right-hand rule in electromagnetism?

Back

The right-hand rule helps determine the direction of the magnetic field around a current-carrying wire.

Front

What is the formula for calculating the force between two magnetic poles?

Back

Force (F) = (magnetic pole strength 1 * magnetic pole strength 2) / (distance between poles)^2.

Front

What is the principle of superposition in electric fields?

Back

The total electric field is the vector sum of individual electric fields from multiple charges.