Physics Academy : +2 Science

01/04/2022

21/12/2021

The modulation index in amplitude modulation is:
(a) Always zero
(b) Between 0 and 1
(c) Between 1 and ∞
(d) None of these

Answer
Answer: (c) Between 1 and ∞

21/12/2021

A microphone converts:
(a) sound signals into electrical signals
(b) electrical signals into sound signals
(c) both (a) and (b)
(d) Neither (a) nor (b)

Answer
Answer: (a) sound signals into electrical signals

21/12/2021

Broadcasting antenna are generally:
(a) Ommi directional type
(b) Vertical type
(c) Horizontal type
(d) None

Answer
Answer: (b) Vertical type

21/12/2021

The audio frequencies range from:
(a) 20 Hz to 20.000 kHz
(b) 20 Hz to 20 kHz
(c) 20 kHz to 20.000 kHz
(d) None of these

Answer
Answer: (b) 20 Hz to 20 kHz

21/12/2021

The term used “to collect the information about an object and a place without physical contact” is called :
(a) modulation
(b) communication
(c) amplification
(d) remote sensing

ANS: Remote sensing.

21/12/2021

Question 1.
Who undertook the first space walk and in which year?
(a) Leonov 1965
(b) Neil Armstrong, 1969
(c) Rakesh Sharma. 1998
(d) None of these

Answer
Answer: (a) Leonov 1965

01/07/2021

Which of the following remains constant if a body travels with constant acceleration?

Time
Velocity
Displacement
None of the above
Answer: (d) None of the above

01/07/2021

What can be said about the displacement of the body if it covers a distance of zero?

It is zero
It cannot be zero
It may or may not be zero
It is negative
Answer: (a) It is zero

30/06/2021

Below is the distance-time curve traced by the particle. What is the maximum instantaneous velocity of the particle around the point
(a) D

(b) B

(c) A

(d) C

Answer: (d) C

30/06/2021

What does the area under acceleration-time graph represent for any given time interval

(a) Final velocity

(b) Distance travelled

(c) Change in the velocity in that time interval

(d) Displacement of the particle

Answer: (c) Change in the velocity in that time interval