PGT Physics Mock Test - UP Jharkhand Haryana PGT Physics Online Mock Test || UP PGT Physics Online Mock Test

1. Which of the following parameters is the same for hydrogen-like atoms and ions in ground States:

1. Radius of the orbit
2. Speed of the electron
3. Energy of the atom
4. Orbital angular momentum of electron

2. A coil of inductance 0.5 H is connected to an alternating EMF of frequency 50 Hz, its reactance is:

1. 25 Ω
2. 125 Ω
3. 157 Ω
4. 250 Ω

3. The magnetic susceptibility of an ideal diamagnetic material is:

1. 0
2. -1
3. 1
4. 10

4. Wattless current means

1. The average power consumed in a cycle is zero
2. EMF is zero
3. Current is zero
4. The phase difference between the current and potential difference is 0

5. Electromagnetic waves are produced by:

1. Accelerating charge
2. Moving charge
3. Static charge
4. None of these

6. The possible values of j for an electron in l = 2 state are:

1. 1/2, 3/2
2. 1, 3
3. 5/3, 3/2
4. 1, 2

7. The nuclear radius of an element X (A = 216) is 7.731 Fermi. The radius of nucleus of Y (A = 8) it is:

1. 22.193
2. 7.731
3. 2.577
4. 2.86

8. Match column-I with column- II and select the correct option:

A. neutron      1. lepton

B. muon        2. fractional charge

C. Pi - particles      3. baryon

D. quark       4. meson

1. 3 1 4 2
2. 4 1 2 3
3. 3 1 4 2
4. 1 3 2 4

9. The upper limit of wavelength in fund series of hydrogenatom spectrum is:

1. 7.12 µm
2. 9.12 µm
3. 8.12 µm
4. 5.12 µm

10. What is the numerical value of bohr magneton:

1. 9.27 × 10^(−25) amp.m^2
2. 9.27 × 10^(24) amp.m^2
3. 9.27 × 10^(−24) amp.m^2
4. 9.27 × 10^(−24) amp.m^(-2)

11. Which of the following transitions given photon of maximum energy:

1. n = 2 to n= 1
2. 1. n = 2 to n= 3
3. 1. n = 4 to n= 1
4. 1. n = 3 to n= 1

12. The total energy of electron in hydrogen atom in ground state is -13.6 eV. The kinetic energy of this electron is:

1. -13.6 eV
2. 3.6 eV
3. 13.6 eV
4. -6.8 eV

13. Proton and Alpha particle are accelerated through the same potential. The ratio of the wavelength associated with the proton and that associated with the Alpha particle is:

1. 2.83
2. 4
3. 2
4. 0.53

14. The energy content of a photon of wavelength 1000 Å, is (in unit of 10^(-19) J):

1. 1.98
2. 2.0
3. 2.5
4. 1

15. The de Broglie wavelength of a Photon and an Alpha particle are equal. The the ratio of their velocities is:

1. 1:4
2. 4:1
3. 1:2
4. 2:1

16. An electron when accelerated by a potential difference of V has a wavelength λ. If electron is accelerated by a potential difference of 4V, then its de Broglie wavelength:

1. λ
2. λ/2
3. λ
4. λ

17. The semiconductor which comes in the category of direct band gap semiconductor is:

1. GaAs
2. Si
3. Ge
4. Si-Ge Combination

18. In a transistor the current amplification factor is 0.9. The transistor is connected in common base configuration. The change in collector current when ways current changes by 4 mA:

1. 4 mA
2. 8 mA
3. 16 mA
4. 36 mA

19. for a transistor β= 50 and base current is 25 μA, The emitter current will be:

1. 2.82 mA
2. 8 mA
3. 1.275 mA
4. 8.75 mA

20. A half wave rectifier is used to supply 100 V DC load 800 Ω. The diode has a plate resistance of 200 Ω. Efficiency of rectification will be:

1. 32.5 %
2. 41.8 %
3. 41.2 %
4. 41.1 %

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