A bar magnet is divided into two pieces, which of the following statement is correct?
Răspuns
(A)
two new magnets are created
3
Consider the wave equation y = 5mm sin [1cm\(^{-1}\)x - 60s\(^{-1}\)t]. The wave number is?
Răspuns
(C)
1.0cm\(^{-1}\)
4
An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?
Răspuns
(A)
15 cm
5
A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?
Răspuns
(B)
there is no relative motion
6
Tyres are treaded to?
Răspuns
(B)
increase friction
7
A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration
Răspuns
(C)
0.80 ms\(^{-2}\)
8
The relationship between the coefficient of linear expansion \(\alpha\) and volumetric expansion (\(\gamma\)) is-----------------
Răspuns
(C)
3\(\alpha\)
9
Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?
Răspuns
(C)
local action
10
A cell whose internal resistance is 0.55\(\Omega\) delivers a current of 4 A to an external resistor. The lost voltage of the cell is?
Răspuns
(B)
2.20 V
11
Which of the following liquid is a poor conductor of electricity?
Răspuns
(A)
Distilled water
12
An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?
Răspuns
(B)
2 days
13
The secondary pigments consist of?
Răspuns
(C)
magenta, yellow, and cyan
14
A person standing waist-deep in a swimming pool appears to have short legs because of light?
Răspuns
(B)
refraction
15
A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound
Răspuns
(C)
343.2 ms\(^{-1}\)
16
When the plate area of a capacitor increases?
Răspuns
(D)
the capacitance increases
17
A magnet relay is a device used for?
Răspuns
(B)
controlling another circuit carrying larger current
18
According to kinetic molecular model in gases,
Răspuns
(C)
the molecules are very far apart and occupy all the spaces made available to them
19
A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?
Răspuns
(A)
2400 J
20
For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?
Răspuns
(A)
X
21
The vapour pressure?
Răspuns
(A)
increases non-linearly with measuring temperature
22
The potential energy in an elastic string of force constant k, which has an extension X is?
Răspuns
(C)
½KX\(^{2}\)
23
A reservoir is filled with liquid of density 2000 kgm\(^{-1}\). Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm\(^{-2}\) (g = 10 ms\(^{-2}\))
Răspuns
(D)
0.455 m
24
Water is not a good thermometric liquid because it?
Răspuns
(D)
wets glass
25
Which of these is a second-class lever?
Răspuns
(D)
wheelbarrow
26
In the formation of sea breeze, wind blows from?
Răspuns
(D)
sea to land
27
Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?
Răspuns
(A)
coupling device
28
In order to view the sun, the most suitable instrument to use is?
Răspuns
(A)
helioscope
29
The eclipse of the moon occurs when?
Răspuns
(C)
the earth comes exactly between the moon and the sun
30
The gravitational pull on the moon is \(\frac{1}{6}\) that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?
Răspuns
(D)
36.0 N
31
The amount of energy required to change a kilogram of ice block into water without a change in temperature is?
Răspuns
(A)
specific latent heat of fusion of ice
32
Which expression gives magnetic flux?
Răspuns
(C)
BA cos \(\theta\)
33
The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?
Răspuns
(D)
straight line
34
What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg\(^{-1}\))
Răspuns
(C)
6.72 x 10\(^{3}\)J
35
A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\) in 20 seconds. The power developed in the engine is?
