hamburger menu
All Coursesall course arrow
adda247
reward-icon
adda247
    arrow
    arrow
    arrow
    The radar used by police to check over-speeding vehicles, works on the principles of
    Question

    The radar used by police to check over-speeding vehicles, works on the principles of

    A.

    Induction effect

    B.

    Raman effect

    C.

    Doppler effect

    D.

    Coulomb effect

    Correct option is C

    The radar used by police to check over-speeding vehicles operates on the Doppler effect. This principle involves the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source. When a vehicle approaches or moves away from the radar, the frequency of the reflected radar waves changes. By measuring this frequency shift, the radar device can calculate the speed of the vehicle.

    test-prime-package

    Access ‘State Judiciary PCS J’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    354k+ students have already unlocked exclusive benefits with Test Prime!
    test-prime-package

    Access ‘State Judiciary PCS J’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    354k+ students have already unlocked exclusive benefits with Test Prime!
    Our Plans
    Monthsup-arrow