Physics NEET Test Series

The dimensional formula of refractive index is:

• [LT–1]

• [LT–2]

• [MLT–2]

• dimensionless

Which of the following is a self-adjusting force?

• Static friction

• Limiting static friction

• Kinetic friction

• Both (1) and (2)

If the magnitude of kinetic energy of a satellite is E, the binding energy of the satellite would be:

• – E

• E

• 2E

• –2E

A and B are two wires of equal lengths, the radius of A is twice that of B and B is stretched by half the tensile load of A. The normal stress on B is: (Young’s modulus of both wires are equal)

• same as that on A.

• 2 times that on A.

• 3 times that on A.

• 9 times that on A.

To increase the temperature of 1 kg ice from –10°C to –6°C, the heat required is x. The amount of heat needed to raise the temperature of 1 kg water by 4°C is:

• x

• 4x

• 8x

• 2x

The number of significant figures in 02.002 is:

• 2

• 5

• 4

• 3

A cyclist comes to skidding stop in 6 m. During this process the force on cycle due to road is 160 N and is opposing the motion. How much work does road do on cycle?

• –720 J

• –960 J

• 960 J

• 720 J

An object of mass m is projected from earth’s surface at an angle of 30° from horizontal with escape velocity (ve). The kinetic energy of the object in outer space would be:

• 1/8 mv^2

• 1/16 mv^2

• zero

• 1/4 mv^2

A perfectly inelastic collision has coefficient of restitution e. The value of e^2 + 2e is:

• 3

• 5/4

• 0

• 7/9

Two identical bodies A and B at temperature 4000 K and 400 K respectively are kept in air at room temperature. Which of the following options is correct?

• B cools at faster rate than A

• A cools at faster rate than B

• A and B both cool at same rate

• No relation can be established about cooling rate.