Question

1. Identical capacitors A and B are fully charged by the same battery. Capacitor A is disconnected from the battery while capacitor B remains connected to it. Identical dielectric slabs are inserted between the plates of the capacitors. Which of the following is true?

A. The final capacitance of A is greater than that of B. B. The final charge is the same for both capacitors. C. The final stored energy is greater for B. D. The final voltage is the same for both capacitors.

2. A parallel plate capacitor (shown) is fully charged and remains connected to the battery. A conducting plate is inserted into the gap between the two plates, partially filling the gap. Which of the following is NOT true?

A: Capacitance increases.

B: Makes no difference where the conducting plate is located vertically between the plates

C: E-field in the gap between the capacitor plates is unchanged.

D: Charge on capacitor plates increases.

3. Refer to the circuit shown below.

a) Why is the following statement true? Statement: After the switch is closed, bulb A glows less brightly than before.

b) Why is the following statement false? Statement: In the situation shown, Vb - Va = 12V, the current is 2A to the right.

c) Why is the following statement true? Statement; The total stored energy of a conducting sphere of radius R, carrying charge Q, increases as R is decreased.

Answer 1

Robution: fo Ao gaeC 2 (2

2 final chanjes one 2-C 2-C es are wet &ame

Henie capai tante nurenes d -t NOT TRUE change anf