If W be the amount of heat produced in the process of charging an uncharged capacitor then the amount of energy stored in it is
(1) 2W
(2)
(3) W
(4) zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA metallic sphere of capacitance , charged to electric potential is connected by a metal wire to another metallic sphere of capacitance charged to electric potential . The amount of heat produced in connecting the wire during the process is:
1.
2.
3.
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
The electric potential at the surface of a charged solid sphere of insulator is 20V. The value of electric potential at its centre will be
1. 30V
2. 20V
3. 40V
4. Zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe capacitance of a parallel plate capacitor is C. If a dielectric slab of thickness equal to one-fourth of the plate separation and dielectric constant K is inserted between the plates, then new capacitance become
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe electric potential at a point at distance 'r' from a short dipole is proportional to
(1)
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA hollow charged metal spherical shell has radius R. If the potential difference between its surface and a point at a distance 3R from the center is V, then the value of electric field intensity at a point at distance 4R from the center is
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCapacitors are connected in series across a source of emf 20KV. The potential difference across will be
(1) 5 KV
(2) 15 KV
(3) 10 KV
(4) 20 KV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe equivalent capacitance between A and B is as the given figure:
(1)
(2)
(3)
(4) None of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo metallic spheres of radii 2cm and 3cm are given charges 6mC and 4mC respectively. The final charge on the smaller sphere will be if they are connected by a conducting wire
(1) 4mC
(2) 6mC
(3) 5mC
(4) 10mC
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen a proton at rest is accelerated by a potential difference V, its speed is found to be v. The speed of an \(\alpha-\textit{particle}\) when accelerated by the same potential difference from rest will be:
1. v
2.
3.
4. 2v
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology