Physics class tests for PUC, ISc, XII in the CBSE, ICSE (CISCE), State boards.

 

Class test — I

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Subject: Physics                                          

Test: Class test — I

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Question 1

Whats the unit of capacitance?

Question 2

What is the amount of work done on an equipotential surface?

Question 3

Between an -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)  (b)  (c) .

Question 5

Electric field intensity  for a spherical metallic conductor is

(a)  (b)  (c) .

Question 6

For a Van de Graaff generator

(a) Outer sphere is at higher potential?

(b) Inner sphere is at higher potential?

Question 7

Cyclotron frequency

(a) is proportional to energy E (b) depends on magnetic field (B)

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  in the H-atom in terms of speed-of-light c is

(a) (b) (c)  (d)

Question 10

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

(a)  (b) (c)  (d) .

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Class test — II. 

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Subject: Physics                                          

Test: Class test — 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 .

Question 5

If dielectric material of dielectric constant K is introduced in a space, which is reduced ?

Question 6

Half life of Ra is , of N is , where . 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

What is the energy of radiation between H-atom levels, ?

Question 9

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