Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 40

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Weekly Quiz Competition

Question 1
4 / -1

An electron of charge \'e\' coulomb passes through a potential difference of V volts. Its energy in \'joules\' will be

A
V /e

B
eV

C
e /V

D
V

Solution
Question 2
4 / -1

In Millikan\'s oil drop experiment, an oil drop of mass 16 × 10^–6 kg is balanced by an electric field of 10⁶ V/m. The charge in coulomb on the drop, assuming g = 10 m/s² is

A
6.2 × 10^–11

B
16 × 10^–9

C
16 × 10^–11

D
16 ×10^–13

Solution
Question 3
4 / -1

Which is not true will respect to the cathode rays?

A
A stream of electrons

B
Charged particles

C
Move with speed same as that of light

D
Can be deflected by magnetic fields

Solution
Question 4
4 / -1

In Thomsons experiment of finding e/m for electrons, beam of electron is replaced by that of muons (particles with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case is satisfied if

A
B is increased 208 times

B
E is increased 208 times

C
B is increased 14.4 times

D
None of the above

Solution
Question 5
4 / -1

The colour of the positive column in a gas discharge tube depends on

A
The type of glass used to construct the tube

B
The gas in the tube

C
The applied voltage

D
The material of the cathode
Question 6
4 / -1

Cathode rays are produced when the pressure is of the order of

A
2 cm of Hg

B
0.1 cm of Hg

C
0.01 mm of Hg

D
1 µm of Hg
Question 7
4 / -1

Which of the following have highest specific charge?

A
Positron

B
Proton

C
He

D
None of these
Question 8
4 / -1

In a Thomson set-up for the determination of e/m, electrons accelerated by 2.5 kV enter the region of crossed electric and magnetic fields of strengths 3.6 × 10⁴ Vm^–1 and 1.2 × 10^–3 T respectively and go through undeflected. The measured value of elm of the electron is equal to

A
1.0 × 10¹¹C – kg^–1

B
1.76 × 10¹¹C – kg^–1

C
1.80 × 10¹¹C – kg^–1

D
1.85 × 10¹¹C – kg^–1

Solution
Question 9
4 / -1

The ratio of specific charge of an α-particle to that of a proton is

A
2 : 1

B
1 : 1

C
1 : 2

D
1 : 3

Solution
Question 10
4 / -1

In an electron gun, the electrons are accelerated by the potential V. If e is the charge and m is the mass of an electron, then the maximum velocity of these electrons will be

A

B

C

D

Solution