HARD
12th ICSE
IMPORTANT
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Two charged conducting spheres of radii a and b are connected to each other by a wire. Find the ratio of electric fields at the surfaces of the spheres.

Important Questions on Capacitors and Dielectrics

MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 20
We can charge a balloon to a quite high potential by nibbing to our hairs but we do not feel electric shock even if we are standing naked feet on the ground. Why?
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 21
If we hold in hand the wires connected to the plates of a charged capacitor, we feel electric shock. The shock from a 2μF capacitor is more intense than that from a 0.02μF capacitor, both at the same potential. Why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 22
The plates of a parallel-plate capacitor connected to a battery acquire exactly equal (and opposite) charges? Why? Will it be true when the plates are of different sizes?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 23

When the key K of the adjacent circuit is pressed, the needle of the ammeter A is deflected but immediately returns to the original position. Why?

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EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 24
The plates of a charged capacitor are connected to a voltmeter. If the plates of the capacitor are separated further, what will be the effect on the reading of the voltmeter?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 25

A parallel-plate capacitor is charged by a battery which is then disconnected. Then, the distance between the plates is decreased. What are the changes in charge on the plates?

MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 25

A parallel-plate capacitor is charged by a battery which is then disconnected. Then, the distance between the plates is decreased. What are the changes in capacitance.

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 25

A parallel-plate capacitor is charged by a battery which is then disconnected. Then, the distance between the plates is decreased. What are the changes in PD between plates,