Physics Test 12

Total Questions: 21

1 - Earth gravitational force of attraction vanishes at

A ) 6400km
B ) Infinity ✅
C ) 42300km
D ) 1000km

2 - Value of increase with the____

A ) Increase in mass of the body
B ) Increase in altitude
C ) Decrease in altitude ✅
D ) None of these

6 - The orbit speed of a low orbit satellite is ____.

A ) Zero
B ) 8ms-¹
C ) 800ms-¹
D ) 8000ms-¹ ✅

7 - The value of 'g' increase with the

A ) Increase in mass of body
B ) Increase in altitude
C ) Decrease in altitude ✅
D ) Increase in weight of body

8 - At altitude h. The value of 'g' can be determined

A ) GNe/ (R+h)² ✅
B ) GR/( Me +h)²
C ) GR/ (Me - h)²
D ) GNe/ ( R-h)²

10 - The distance of moon from Earth is nearly

A ) 380,000km ✅
B ) Infinity
C ) 42300km
D ) 1000km

11 - Formula to determine the value of gravitational acceleration is

A ) GNe/(R+h)² ✅
B ) G( R+h)/Me
C ) Me( R+h)/ G
D ) G/ Me(R+h)²

12 - Earth's gravitational force of attraction vanishes at

A ) 380,000km
B ) Infinity ✅
C ) 42300km
D ) 1000km

13 - A force which is inversely proportional to square of the distance between the centre of bodies is

A ) Frictional force
B ) Centrifugal force
C ) Centripetal force
D ) Gravitational force ✅

14 - The value of gravitational field strength near the surface of earth is

A ) 20NKg-¹
B ) 10NKg -¹ ✅
C ) 5 NKg-¹
D ) 30 Nkg-¹

16 - Value of gravitational acceleration at 1000km above the surface of moon is

A ) 3.7 ms-²
B ) 7.3ms-²
C ) 37.3 ms-²
D ) 9.8ms-²

17 - The value of gravitational acceleration 'g' on the surface of moon is

A ) 3.7ms-²
B ) 9.8ms-²
C ) 1.62ms-² ✅
D ) 10ms-²

18 - The moon completes its one revolution around the earth in

A ) 25.3days
B ) 27.3days ✅
C ) 29.3days
D ) 31.3days

19 - The orbital speed of a low orbit satellite is

A ) Zero
B ) 8ms-¹
C ) 800ms-¹
D ) 8000ms-¹ ✅

20 - The value of 'g' at Jupiter is

A ) 1.62ms-²
B ) 9.8ms-²
C ) 10ms-²
D ) 25.94ms-² ✅

21 - The value of universal constant of gravitational is

A ) 6.673 x 10-¹¹ nmkg-²
B ) 6.673 x 10-¹¹ Nm²kg-² ✅
C ) 6.673 x 10-¹¹ Nm-¹ kg²
D ) 6.673× 10-¹¹ Nm-²kg²