Physics Test

Question 1
5 / -1

The communication system needed for a given signal depends on which of the following?

A
Band of frequencies

B
Length of the channel

C
Size of the transmitter

D
Size of the collector

Question 2
5 / -1

The difference in mass of a nucleus and its constituent nucleons is called the ____________.

A
Packing fraction

B
Mass defect

C
Binding energy

D
Binding energy per nucleon

Question 3
5 / -1

The shortest wavelength in the Lyman series of the hydrogen spectrum is 912 Å. The shortest wavelength present in Paschen series of spectral lines will be:

A
8208 Å

B
6566 Å

C
3648 Å

D
14592 Å

Question 4
5 / -1

The ratio maximum wavelength to minimum wavelength in Lyman series is:

A
4/3

B
3/4

C
1/3

D
1/4

Question 5
5 / -1

If a light ray travels from denser to rarer medium. Which of the following statement/s are correct?

(A) Energy increases

(B) Frequency remain same

(C) Phase changes by 90°

(D) Velocity increases

(E) Wavelength decreases

Choose the correct answer from the options given below :

A
(B) only

B
(B) and (D) only

C
(A) and (C) only

D
(E) only

Question 6
5 / -1

When a forward bias is applied to a p-n junction diode, then:

A
The majority carrier current becomes zero

B
The potential barrier is raised

C
The junction resistance increases

D
The width of depletion layer reduces

Question 7
5 / -1

While looking at an image formed by a convex lens one half of the lens is covered with a black paper. What will be its effect on the image formed?

A
Half of the image will be visible

B
Intensity of the image will be diminished

C
Image will be inverted now

D
One can see image of smaller size

Question 8
5 / -1

Shown in the figure are two plane mirrors XY and YZ (XY ⊥ YZ) joined at their edge. Also shown is a light ray falling on one of the mirrors and reflected back parallel to its original path as a result of this arrangement. The two mirrors are now rotated by an angle θ to their new position X'YZ', as shown. As a result the new reflected ray is at an angle α from the original reflected ray. Then :

A
α = 0

B
α = θ

C
α = 2θ

D
α = 4θ

Question 9
5 / -1

In Rutherford's gold foil experiment, thin sheets of gold foil was bombarded with _________ to understand the nuclear model of atom.

A
alpha particles

B
beta particles

C
gamma particles

D
x rays

Question 10
5 / -1

An electron beam with cross-section area 1.0 mm² has 6 × 10¹⁶ electrons (q = 1.6 × 10^-19 C) passing per second perpendicular to any section. The current density (ampere per metre2) in the beam is:

A
9.6 × 10²

B
9.6 × 10^-3

C
9.6

D
9.6 × 10³

Submit Test

Physics Test - ...

Question 1

Band of frequencies

Length of the channel

Size of the transmitter

Size of the collector

Question 2

Packing fraction

Mass defect

Binding energy

Binding energy per nucleon

Question 3

8208 Å

6566 Å

3648 Å

14592 Å

Question 4

4/3

3/4

1/3

1/4

Question 5

(B) only

(B) and (D) only

(A) and (C) only

(E) only

Question 6

The majority carrier current becomes zero

The potential barrier is raised

The junction resistance increases

The width of depletion layer reduces

Question 7

Half of the image will be visible

Intensity of the image will be diminished

Image will be inverted now

One can see image of smaller size

Question 8

α = 0

α = θ

α = 2θ

α = 4θ

Question 9

alpha particles

beta particles

gamma particles

x rays

Question 10

9.6 × 102

9.6 × 10-3

9.6

9.6 × 103

User

Question Analysis

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

9.6 × 10²

9.6 × 10^-3

9.6 × 10³