Physics - Mock Test 25

Question 241

Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?

A) -3.75 diopters B) -11.25 diopters C) 3.75 diopters D) 11.25 diopters

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Question 242

Sound wane in air are ?

A) Transverse B) Longitudinal C) Electromagnetic D) Polarised

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Question 243

Which one of the following quantities does not have the unit?

A) Stress B) force C) Strain D) Pressure

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Question 244

Which one of the following is an scalar quantity?

A) Force B) Pressure C) Velocity D) Acceleration

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Question 245

The sunlight from sun to Earth reaches in ?

A) 5 minutes B) 6 minutes C) 8 minutes D) 10 minutes

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Question 246

The unit of pressure is ?

A) Kg / cm2 B) Kg / cm C) Kg / mm D) Nm

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Question 247

The critical speed of an artificial satellite is?

A) 8 Kms-1 B) 8.1 Kms-1 C) 7.9 Kms-1 D) 8 ms-1

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Question 248

A hoop and disc have same mass and radius. Their rotational K.E are related by an equation?

A) K.Ehoop = K.Edisc B) K.Ehoop = 2K.Edisc C) K.Ehoop = 1/2K.Edisc D) K.Ehoop = 4K.Edisc

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Question 249

The rotational K.E of hoop is equal to the?

A) its translational K.E B) half than its translational K.E C) double than its translational K.E D) four times than its translational K.E

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Question 250

Torque acting on a body determines?

A) acceleration B) linear acceleration C) angular acceleration D) direction of motion of the body

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