Physics-Capacitor

Test Preparation on Physics-Capacitor

1.

The plates of a parallel plate capacitor are charged with surface densitiess1 ands2 (s1=s2=s)respectively. The electric field at points:

1inside the region between the plates will be zero
2above the upper plate and below the lower plate will be zero
3everywhere in space will be zero
4inside the region between the plates will be uniform and non zero

2.

In an isolated parallel plate capacitor of capacitance C, the four surfaces have charges Q1, Q2, Q3, and Q4, as shown in the figure. The potential difference between the plates is:

1a
2b
3c
4d

3.

Two very large thin conduction plates having same cross sectional area are placed as shown in figure. They are carrying charges Q and 3Q respectively. The variation of electric field as a function at x (for x = 0 to x = 3d) will be best represented by

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1a
2b
3c
4d

4.

Consider the situation shown in figure. The capacitor A has a charge q on it whereas B is uncharged. The charge appearing on the capacitor B a long time after the switch closed, is

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1Zero
2q/2
3q
42q

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