Physics Test 56

Result

Physics Test 56

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Weekly Quiz Competition

Question 1
4 / -1

From a solid sphere of mass M and radius R a cube of maximum possible volume is cut. Moment of inertia of cube about an axis passing through its centre and perpendicular to one of its faces is:

A
4MR²/ 9√3π

B
4MR²/ 3√3π

C
MR²/ 32√2π

D
MR²/ 16√2π
Question 2
4 / -1

On a hot summer night, the refractive index of air is smallest near the ground and increase with height from the ground. When a light beam is directed horizontally, the Huygens’ principle leads us to conclude that as its travels, the light beam:

A
bends downwards

B
bends upwards

C
becomes narrower

D
goes horizontally without any deflection
Question 3
4 / -1

A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are:

A
200 kHz, 2000 kHz

B
2000 kHz and 1995 kHz

C
2 MHz only

D
2005 kHz, and 1995 kHz