# Physics Class tests for Junior college (PUC/ISc/XII/CBSE/ICSE)

SUB: PHYSICS                                              Test: Class test I

CLASS: ISC-II, PUC-II

Question 1

Whats the unit of capacitance?

Question 2

What is the amount of work done on an equi-potential surface?

Question 3

Between an a-particle and a proton which has more energy in a 100-Volt region?

Question 4

Which is correct for a series combination of capacitance?

(a) C = C1+C2 (b) C = 1/C1 + 1/C2 (c) 1/C = 1/C1 + 1/C2

Question 5

Electric field intensity E for a spherical metallic conductor is

(a) s/e0 (b) 2s/e0 (c) 2qs/e0

Question 6

For a Van-de-Graf Generator

(a) Outer sphere is at higher potential

(b) Inner sphere is at higher potential

Question 7

(a) Cyclotron frequency is proportional to energy (b) depends on magnetic field

Question 8

Angular Momentum L is an integral multiple of which constant?

(a) Fine structure constant

(b) Rydberg Constant

(c) Universal Gas Constant

(d) Planck’s Constant

Question 9

Ground state speed of e in the H-atom in terms of speed-of-light c is

(a) c/137 (b) c.137 (c) a.c/137 (d) c/10

Question 10

Whats the energy of H-atom according to Niels Bohr?

(a) -13.61/n2 eV (b) +13.61/n2 eV (c) -13.61/n eV (d) -13.61 eV

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SUB: PHYSICS                                                                                              Test: Class test II

CLASS: ISC-II, PUC-II

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Question 1

Which property of the charge is valid?

(a) Charge is a Vector quantity

(b) Conservation of quantity of charge

(c) flux of charge outside a Gaussian surface is conserved.

Question 2

Which is the drawback of Rutherford’s model?

(a) Atomic instability due to radiative energy loss.

(b) Line spectrum of H-atom is inexplicable.

(c) Can’t explain H-atom.

Question 3

Which are drawbacks of Bohr’s theory?

(a) Can’t explain Balmer series (b) Can’t explain atomic stability (c) Can’t explain N-spectrum.

Question 4

Write out the relation between e, er, e0.

Question 5

If dielectric material of dielectric constant K is introduced in a space, which is reduced E, V or Q?

Question 6

Half life of Ra is x hrs of N is y hrs where x < y. If we start with 1000 of each which is available in less quantity after an hour?

Question 7

Which is used in a nuclear reactor as a moderator material and why?

Question 8

Energy of radiation b/w H-atom levels, n=2, n = 3?

Question 9

Write the charge (in units of electron’s charge e) and mass (in units of amu = u) of proton, e, a, 12C6 .