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Physics Test-17...

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  • Question 1
    4 / -1

    Unit of magnetic flux is:

  • Question 2
    4 / -1

    In a photoelectric experiment, with light of wavelength, \(\lambda\), the fastest electron has speed, \(v\). If, the exciting wavelength is changed to \(\frac{3 \lambda}{4}\), the speed of the fastest emitted electron will become:

  • Question 3
    4 / -1

    A steam engine delivers \(5.4 \times 10^{8} J\) of work per minute and services \(3.6 \times 10^{9} J\) of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

  • Question 4
    4 / -1

    A semiconductor in its purest form is known as ___________.

  • Question 5
    4 / -1

    A car, initially at rest travels \(20~ m\) in \(4~ sec\) along a straight line with constant acceleration. Find the acceleration of car?

  • Question 6
    4 / -1

    A stepdown transformer reduces the voltage of a transmission line from \(2200 \mathrm{~V}\) to \(220 \mathrm{~V}\). The power delivered by it is \(880 \mathrm{~W}\) and its efficiency is \(88 \%\). The input current is:

  • Question 7
    4 / -1

    If a person studies about a fluid which is at rest, what will you call his domain of study?

  • Question 8
    4 / -1

    2-Methyl-2-butene will be represented as:

  • Question 9
    4 / -1

    A screw gauge gives the following readings whenused to measure the diameter of a wire:

    Main scale reading = 0 mm

    Circular scale reading = 52 divisions

    Given that 1 mm on main scale corresponds to 100divisions on the circular scale. The diameter of thewire from the above data is:

  • Question 10
    4 / -1

    Which of these relations is wrong?

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