Q.2 The spectrum of a star’s light is measured and the wavelength of one of the lines as the sodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm when observed in the laboratory. This means the star is
A) Moving away from the earth C) Stationary
A) Moving away from the earth C) Stationary
B) Moving towards the north D) Revolving around the planet
Q.3 What is the period of mass spring system during SHM if the ratio of mass to spring constant is ¼?
A) π C) 1/π
B) 2 π D) ½ π
A) π C) 1/π
B) 2 π D) ½ π
Q.6 When the length of a simple pendulum is doubled, find the ratio of the new frequency to the old frequency?
A) 1/4 C) √2
B) 1/2 D) 1/√2
A) 1/4 C) √2
B) 1/2 D) 1/√2
Q.10 Speed of sound through a gas is measured as 340 m/s at pressure P1 and temperature T1. What will be the speed of sound if pressure of gas is doubled but temperature is kept constant?
A) 342 m/s C) 170 m/s
B) 340 m/s D) 680 m/s
A) 342 m/s C) 170 m/s
B) 340 m/s D) 680 m/s
Q.13 Frequency of simple pendulum of length 9.8 m will be
A) 2 π Hertz C) 1/2π Hertz
B) π/2 Hertz D) π/4 Hertz
Q.14 A body performs simple harmonic motion with a period of 0.063 s. The maximum speed of 3.0 ms1. What are the values of the amplitude ‘xo (m)’ and angular frequency ‘ω (rads1)’?
A) xo = 0.03, ω = 100 C) xo = 5.3, ω = 16
B) xo = 0.19, ω = 16 D) xo = 3.3, ω = 100
A) 2 π Hertz C) 1/2π Hertz
B) π/2 Hertz D) π/4 Hertz
Q.14 A body performs simple harmonic motion with a period of 0.063 s. The maximum speed of 3.0 ms1. What are the values of the amplitude ‘xo (m)’ and angular frequency ‘ω (rads1)’?
A) xo = 0.03, ω = 100 C) xo = 5.3, ω = 16
B) xo = 0.19, ω = 16 D) xo = 3.3, ω = 100