Physics 1102 Exam 1 Review Flashcards

A comprehensive review of key concepts and questions for Physics 1102 Exam 1 covering chapters 15 to 17.

What characterizes electrical conductors?

Electric charges move freely.

What happens to capacitance when a capacitor is switched from a 6.0V battery to a 12.0V battery?

It stays the same.

By how much does the electric field strength change when voltage is doubled?

Two times.

What is the magnitude of the electric force when one charge is reduced to one-third and distance is doubled?

F/12.

How does electric flux change when the surface area is expanded by a factor of three?

The flux would not change.

What is the direction of the electric field with equipotential surfaces?

It is out of the page (+x-axis).

What happens to a dipole when a positive test charge is brought near?

The dipole will rotate in a clockwise direction.

How is current ranked in different sections of a wire of varying cross-section?

I1 = I2 = I3.

Which situation involves the least current?

A wire that has 1.5 C passing a given point in 1.5 min.

How does the resistance of a thinner wire compare to a thicker wire?

It is 4 times that of the thicker wire.

How long can a car battery deliver current for a 60.0 Watts light bulb?

2.5 hours.

What motion does a proton released from rest at zero potential exhibit?

Moves toward P with increasing speed.

What is the net force direction on a charge at the top?

None of these.

Which statement is true about capacitors in parallel?

The potential difference across each capacitor is the same.

What is the ratio q1/q2 if the electric potential is zero at point A, which is a distance L/4 from q1?

-1/3.

What is the electric field strength between parallel plates separated by 11 cm?

Calculate, given a potential difference of 425 V at 9.4 cm.

Rank electric field strengths from largest to smallest at points a to d.

E_b > E_a > E_d > E_c.

How to calculate the equivalent capacitance of two capacitors C1 and C2?

Use C1 = 10.60 μF and C2 = 4.60 μF.

What is the direction of the electric field if a proton slows down without deflecting?

Up.

What about the direction of the electric field if an electron slows down?

Down.

What type of particle speeds without deflecting in the electric field pointing from A to B?

Na+ ion.

What is the sign of the charge in the plate with a small ball suspended above it?

Negative.

What is the net electric field from multiple charges arranged in a circle?

Calculate at the origin O.

At what temperature does aluminum wire's resistance increase by 50% from 22.2 °C?

139.6 °C.

How much initial kinetic energy is required for a proton to approach an alpha particle?

4.19 × 10^{-13} J.

What is the magnitude of the net electric field at the origin from four equal charges?

283 N/C.

What is the energy stored in a capacitor with plates of area 0.100 m² at 8.50 V?

1.49e-08 J.

What is the magnitude of the electric field in the capacitor after inserting a dielectric?

890 V/m.

What is the capacitance after inserting a dielectric with κ = 4.44?

1.83 nF.