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Objective Questions
GS
GS Set-1
Physics
Dual Nature of Radiation
39

Dual Nature of Radiation MCQ with Answers

39) If the voltage across the electrodes of a cathode ray tube is 500 volts then energy gained by the electrons is

7??10^?17?J

9??10^?17?J

8??10^?17?J

6??10^?17?J

Answer is:

8??10^?17?J

Explanation:

Use E=eV

Dual Nature of Radiation MCQ with Answers

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Related Dual Nature of Radiation MCQ with Answers

40) Which of the following is correct about photoelectric cell?

converts light energy into heat energy

converts electric into light energy

converts light energy into sound energy

converts light energy into electric energy

Answer is:

converts light energy into electric energy

Explanation:

a device using a photoelectric effect to generate current.

41) If a beam goes undeflected in Thomson's experiment, then speed of the electron is

5??10⁶?m/s

6??10⁶?m/s

5.5??10⁶?m/s

6.5??10⁶?m/s

Answer is:

5??10⁶?m/s

Explanation:

Use BeV=eE

42) When an electron enters a magnetic field of 0.01 T with a speed of?10⁷ms^?1?it describes a circle of radius 6 mm there. Then specific charge of the electron is given by

1.87??10¹¹Ckg^?1

1.77??10¹¹Ckg^?1

1.67??10¹¹Ckg^?1

1.57??10¹¹Ckg^?1

Answer is:

1.67??10¹¹Ckg^?1

Explanation:

Use BeV=eE

43) If an electron moving with a speed of 2.5?10⁷ms^?1?is deflected by an electric field of 1.6 k V?m^?1?perpendicular to its circular path, then e/m for the electron will be

1.85??10¹¹Ckg^?1

1.7??10¹¹Ckg^?1

1.8??10¹¹Ckg^?1

1.9??10¹¹Ckg^?1

Answer is:

1.7??10¹¹Ckg^?1

Explanation:

Use BeV=eE

Dual Nature of Radiation MCQ with Answers

For more MCQ's Click Here

39) If the voltage across the electrodes of a cathode ray tube is 500 volts then energy gained by the electrons is

8??10?17?J

Dual Nature of Radiation MCQ with Answers

Related Dual Nature of Radiation MCQ with Answers

40) Which of the following is correct about photoelectric cell?

converts light energy into electric energy

41) If a beam goes undeflected in Thomson's experiment, then speed of the electron is

5??106?m/s

42) When an electron enters a magnetic field of 0.01 T with a speed of?107ms?1?it describes a circle of radius 6 mm there. Then specific charge of the electron is given by

1.67??1011Ckg?1

43) If an electron moving with a speed of 2.5?107ms?1?is deflected by an electric field of 1.6 k V?m?1?perpendicular to its circular path, then e/m for the electron will be

1.7??1011Ckg?1

Dual Nature of Radiation MCQ with Answers

8??10^?17?J

5??10⁶?m/s

42) When an electron enters a magnetic field of 0.01 T with a speed of?10⁷ms^?1?it describes a circle of radius 6 mm there. Then specific charge of the electron is given by

1.67??10¹¹Ckg^?1

43) If an electron moving with a speed of 2.5?10⁷ms^?1?is deflected by an electric field of 1.6 k V?m^?1?perpendicular to its circular path, then e/m for the electron will be

1.7??10¹¹Ckg^?1