# 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.     2.     3.  2W   4.  4W

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 |
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Root mean square speed of the molecules of ideal gas is v. If pressure is increased two times at constant temperature, then the rms speed will become

1.

Subtopic:  Types of Velocities |
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1 mol of gas occupies a volume of 200 mL at 100 mm pressure. What is the volume occupied by two moles of gas at 400 mm pressure and at same temperature?

1.  50 mL

Subtopic:  Ideal Gas Equation |
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A charged particle travels along a straight line with a speed v in a region where both electric foeld E and magnetic field B are present. If follows that

Subtopic:  Lorentz Force |
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What will be the wave velocity, if the radar gives 54 waves/min and wavelength of the given wave is 10 m?

1.  4 m/s

Subtopic:  Wave Motion |
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A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns in secondary coil. It is connected to a 220 V main supply and secondary feeds to a 100 kΩ resistance. The potential difference per turn is

1.  1.1 V

2.  25 V

3.  18 V

4.  11 V
Subtopic:  Transformer |