IB DP Physics Topic 5 Paper 1 2019

• A. Decreasing the charge on the particle

• B. Decreasing the separation of the plates

• C. Increasing the length of the plates

• D. Increasing the potential difference between the plates

A thin copper wire and a thick copper wire are connected in series to an electric cell. Which quantity will be greater in the thin wire?

• A. Current

• B. Number of free charge carriers per unit volume

• C. Net number of charge carriers crossing a section of a wire every second

• D. Drift speed of the charge carriers

• A. 1.0A

• B. 1.6A

• C. 2.0A

• D. 3.0A

When a wire with an electric current I is placed in a magnetic field of strength B it experiences a magnetic force F. What is the direction of F?

• A. In a direction determined by I only

• B. In a direction determined by B only

• C. In the plane containing I and B

• D. At 90° to the plane containing I and B

Two cells each of emf 9.0 V and internal resistance 3.0 Ω are connected in series. A 12.0 Ω resistor is connected in series to the cells. What is the current in the resistor?

• A. 0.50 A

• B. 0.75 A

• C. 1.0 A

• D. 1.5 A

Charge flows through a liquid. The charge flow is made up of positive and negative ions. In one second 0.10 C of negative ions flow in one direction and 0.10 C of positive ions flow in the opposite direction.

What is the magnitude of the electric current flowing through the liquid?

• A. 0 A

• B. 0.05 A

• C. 0.10 A

• D. 0.20 A

A particle with a charge ne is accelerated through a potential difference V.

What is the magnitude of the work done on the particle?

• A. eV

• B. neV

• C. nV/e

• D. eV/n

What is the unit of electrical potential difference expressed in fundamental SI units?

• A. kg m s-1 C-1

• B. kg m2 s-2 C-1

• C. kg m2 s-3 A-1

• D. kg m2 s-1 A

• A.

• B.

• C.

• D.

• A. 3.0 V

• B. 4.0 V

• C. 8.0 V

• D. 9.0 V