Physics Test 1

Result

Physics Test 1

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Weekly Quiz Competition

Question 1
4 / -1

This question has Statement I and Statement II Of the four choices given the statements, choose the one that describes the two statements. ,

Statement I Davisson-Germer experiment established the wave nature of electrons. ,

Statement II If electrons have wave nature, they can interfere and show diffraction.

A
Statement I is false, Statement II is true

B
Statement I is true, Statement II is false

C
Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I

D
Statement I is true, Statement II is true; Statement II is not the correct explanation of Statement I
Question 2
4 / -1

A radar has a power of 1 kW and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth = 6.4 × 10⁶ m)is

A
80 Km

B
16 Km

C
40 Km

D
64 Km
Question 3
4 / -1

This question has Statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two statements. ,

If two springs S₁ and S₂ of force constants kx and k₁, respectively are stretched by the same force, it is found that more work is done on spring S₁ than on spring S₂. ,

Statement I If stretched by the same amount, work done on will be more than that on S₂. ,

Statement II k₁ < k2

A
Statement I is false, Statement II is true

B
Statement I is true, Statement II is false

C
Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I

D
Statement I is true, Statement II is true: Statement II is not the correct explanation of Statement I
Question 4
4 / -1

A coil is suspended in a uniform magnetic field with the plane of the coil parallel to the magnetic lines of force. When a current is passed through the coil, it starts oscillating; it is very difficult to stop. But if an aluminium plate is placed near to the coil, it stops. This is due to

A
development of air current when the plate is placed

B
induction of electrical charge on the plate

C
shielding of magnetic lines of force as aluminium is a paramagnetic material

D
electromagnetic induction in the aluminium plate giving rise to electromagnetic damping