In designing, a beam for its use to support a lead. The depression at centre is proportional to (where, Yis Young’s modulus)   1.  Y2 2.  Y 3.   4.

Subtopic:  Elasticity |
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A balloon is filled at 27 °C and 1 atm pressure by 500 m3. He, At -3 °C and 0.5 atm pressure, the volume of He will be

1.  700 m3

Subtopic:  Ideal Gas Equation |
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The particle of mass 50 kg is at rest. The work done to accelerates it by 20 m/s in 10 s is

1.  103 J

Subtopic:  Concept of Work |
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The moment of inertia of a circular loop of radius R, at a distance of R/2 around a rotating axis parallel to horizontal diameter of loop is

1.  MR2

Subtopic:  Moment of Inertia |
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The ratio of radius of two bubbles is 2: 1. What is the ratio excess pressure inside them?

1.  1: 2

Subtopic:  Surface Tension |
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In the capacitor of capacitance C, charge Q and energy W is stored. If charge is increases upto 2Q, the energy stored will be

1.

Subtopic:  Energy stored in Capacitor |
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The unit of thermal conductivity is

1.  Wm-1K-1

Subtopic:  Conduction |
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Photon and electron are given same energy (10‑20J). Wavelength associated with photon and electron are λp and λe, the correct statement will be

Subtopic:  De-broglie Wavelength |
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The half life of radioactive elements is 600 yr the fraction of sample that would remain after 3000 yr is

1.  1/2

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A particle moves along with x-axis. The position x os particles with respect to time t from origin given by x = b0 + b1t + b2t2. The acceletration of particle is

1.  b0

Subtopic:  Acceleration |