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


Class test — I

Subject: 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 equipotential surface?

Question 3

Between an \alpha-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 = C_1+C_2 (b) C = \frac{1}{C_1} + \frac{1}{C_2} (c) \frac{1}{C} = \frac{1}{C_1} + \frac{1}{C_2}.

Question 5

Electric field intensity (E =|\vec{E}|) for a spherical metallic conductor is

(a) \frac{\sigma}{\epsilon_0} (b) \frac{2\sigma}{\epsilon_0} (c) \frac{2q\sigma}{\epsilon_0}.

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 (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 e^{-} in the H-atom in terms of speed-of-light c is

(a) \frac{c}{137} (b) c\times 137 (c) \frac{\alpha\times c}{137} (d) \frac{c}{10}

Question 10

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

(a) -\frac{13.61}{n^2}\hspace{2pt}eV (b) +\frac{13.61}{n^2}\hspace{2pt}eV (c) -\frac{13.61}{n}\hspace{2pt}eV (d) -13.61 \hspace{2pt} eV.


Class test — II. 

Subject: Physics                                          

Test: Class test — II

Class: ISC — II, PUC — II

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 \epsilon, \epsilon_0, \epsilon_r.

Question 5

If dielectric material of dielectric constant K is introduced in a space, which is reduced E, V \hspace{2pt}or\hspace{2pt}Q?

Question 6

Half life of Ra is x \hspace{2pt} hrs, of N is y \hspace{2pt}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

What is the energy of radiation between 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 (p) electron (e), \alpha -{particle} and ^{12}C_6.

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