NTPC CBT-2 Physics Quiz - 70

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Question 1:

What should be the escape velocity for a object on earth ?

Question 2:

An electric circuit is consisting of a cell, an ammeter and a nichrome wire of length l. If the length of the wire is reduced to half (l/2), then the ammeter reading-

Question 3:

Ampere is the S.I unit of which of the following physical quantity ?

Question 4:

The shape of a rain drop is spherical due to –

Question 5:

A sound wave has a  frequency of 4 kHz and wavelength 30 cm. How long will it take to travel 2.4 km ?

Question 6:

Total internal reflection cannot take place in which of the following conditions?  

Question 7:

A bus starting from a bus-stand and moving with uniform acceleration attains a speed of 20 km/h in 10 minutes. What is its acceleration ?

Question 8:

Which of the following is true for the image formed by a plane mirror?

Question 9:

Elasticity is the ability of a body to resist a distorting influence and to return to its original size and shape when that influence or force is removed, which one of the following is more elastic?

Question 10:

In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is $0.26 \mathrm{G}$ and the dip angle is $60^{\circ}$. What is the magnetic field of the earth at this location?