Physics - Online Test
Q1. In pure translational motion of a rigid body
Answer : Option C
Explaination / Solution:
In translational motion when the body moves along a straight line or more exactly when every point of the body travels on paralell lines, thus at any instant of time every particle of the body has the same velocity.
Q2. When a bar magnet is pushed towards the coil connected in series with a galvanometer, the pointer in the galvanometer G
Answer : Option B
Explaination / Solution:
When bar is in motion then flux will changed hence current will be induced.
Q3. In which case is electron emission from a metal not known?
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. The word Science originates from the Latin verb Scientia meaning
Answer : Option B
Explaination / Solution:
The phrase "scientia potentia est" (or "scientia est potentia" or also "scientia potestas est") is a Latin aphorism meaning "knowledge is power"
Q5. A
transverse wave moves from a medium A to a medium B. In medium A, the velocity
of the transverse wave is 500 ms-1 and the wavelength is 5 m. The
frequency and the wavelength of the wave in medium B when its velocity is 600
ms-1, respectively are
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. A wire of resistance 2 ohms
per meter is bent to form a circle of radius 1m. The equivalent resistance
between its two diametrically opposite points, A and B as shown in the figure
is
Answer : Option B
Explaination / Solution:
Q7. The scalar product of two vectors A and B in terms of the magnitudes and angle is
Answer : Option A
Explaination / Solution:
The scalar product of two vectors can be constructed by taking the component of one vector in the direction of the other and multiplying it times the magnitude of the other vector. This can be expressed in the form
Q8. In a hydrogen atom, the electron revolving in the fourth orbit, has angular momentum equal to
Answer : Option D
Explaination / Solution:
Angular
momentum L = n h
For
n = 4, L = 4h = 4h /2 π
=2h/ π
Q9. If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. The three elements of a generalized communication system are
Answer : Option A
Explaination / Solution:
In communication the Transmitter helps in transmitting the signal through communication channel which acts as a physical path that connects transmitter to a receiver.And the receiver receives the transmitted signal and converts those signals in their original form.
