Physics Test 180

Result

Physics Test 180

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

A thief is running away on a straight road on a jeep moving with a speed of 9 m/s. A police man chases him on a motor cycle moving at a speed of 10 m/s. If the instantaneous separation of jeep from the motor cycle is 100 m, how long will it take for the police man to catch the thief?

A
1 second

B
19 second

C
90 second

D
100 second

Solution
Question 3
4 / -1

Six vectors have the magnitudes and directions indicated in the figure. Which of the following statements is true?

A

B

C

D

Solution
Question 4
4 / -1

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle θ should be

A
0°

B
30°

C
45°

D
60°

Solution

The tension in both strings will be same due to symmetry.
Question 5
4 / -1

When a rubber-band is stretched by a distance x, it exerts restoring force of magnitude F = ax + bx² where a and b are constants. The work done in stretching the unstretched rubber-band by L is:

A

B

C

D

Solution
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

A body is projected up with a velocity equal to 3/4th of the escape velocity from the surface of the earth. The height it reaches from the centre of the earth is (Radius of the earth = R)

A
10R / 9

B

C
9R / 8

D
10R / 3

Solution
Question 8
4 / -1

Choose the wrong statement.

A
The bulk modulus for solids is much larger than for liquids.

B
Gases are least compressible.

C
The incompressibility of the solids is due to the tight coupling between neighbouring atoms.

D
The reciprocal of the bulk modulus is called compressibility

Solution

Solids are least compressible whereas gases are highly compressible.
Question 9
4 / -1

Wax is coated on the inner wall of a capillary tube and the tube is then dipped in water. Then, compared to the unwaxed capillary, the angle of contact q and the height h upto which water rises change. These changes are :

A
q increases and h also increases

B
q decreases and h also decreases

C
q increases and h decreases

D
q decreases and h increases

Solution
Question 10
4 / -1

A

B

C

D

Solution