NEET Physics: Questions 1906 - 1908 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1906

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

The source producing sound and an observer both are moving along the direction of propagation of sound waves. If the respective velocities of sound, source and an observer are V, V s and V O, then the apparent frequency heard by the observer will be,

Choices

Choice (4) Response

a.

n(vv0)v+vs

b.

n(v+v0)vv0

c.

n(vv0)vvs

d.

n(v+v0)v+vs

Question number: 1907

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

Two satellites S 1 and S 2 revolve round a planet in the same direction in circular orbits. Their periods of revolutions are 1 hour and 6 hour respectively. The radius of S 1 is 1.5 ⨯ 10 5 km and the radius of S 2 is 4.95 ⨯ 10 5 km. The velocity of S 2 with respect to S 1 is 1.35π105kmhr . The angular velocity of S 2 as actually observed by an astronaut in S 1 is –

Choices

Choice (4) Response

a.

π2.55radhr

b.

π3radhr

c.

π6.10radhr

d.

2π7radhr

Question number: 1908

» Experimental Skills » Meter Bridge

MCQ▾

Question

In an experiment to determine an unknown resistance, a 100 cm long resistance wire is used. The unknown resistance is kept in the left gap and a known resistance is put into the right gap. The scale used to measure length has a least count 1 mm. The null point B is obtained at 40.0 cm from the left gap. Determine the percentage error in the computation of unknown resistance.

Choices

Choice (4) Response

a.

0.42%

b.

0.50%

c.

0.24%

d.

0.28%

f Page
Sign In