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Physics · PYQ NEET UG 2023
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Physics · PYQ NEET UG 2023
A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity \( 4\text{ m s}^{-1} \). The ball strikes the water surface after \( 4\text{ s} \). The height of bridge above water surface is (Take \( g = 10\text{ m s}^{-2} \)) :
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A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is :
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In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of \( 2.0 \times 10^{10}\text{ Hz} \) and amplitude \( 48\text{ V m}^{-1} \). Then the amplitude of oscillating magnetic field is : (Speed of light in free space \( = 3 \times 10^8\text{ m s}^{-1} \))
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The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to \( (\frac{1}{16})^{\text{th}} \) of its initial value?
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The magnetic energy stored in an inductor of inductance \( 4 \, \mu\text{H} \) carrying a current of \( 2 \, \text{A} \) is :
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In hydrogen spectrum, the shortest wavelength in the Balmer series is \( \lambda \). The shortest wavelength in the Bracket series is :
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The venturi-meter works on :
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A \( 12\text{ V} \), \( 60\text{ W} \) lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of \( 220\text{ V} \). Assuming the transformer to be ideal, what is the current in the primary winding?
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The potential energy of a long spring when stretched by \( 2\text{ cm} \) is \( U \). If the spring is stretched by \( 8\text{ cm} \), potential energy stored in it will be :
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A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
Read answer →Physics · PYQ NEET UG 2023
For the following logic circuit, the truth table is:
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If the galvanometer \( G \) does not show any deflection in the circuit shown, the value of \( R \) is given by :
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The net magnetic flux through any closed surface is :
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Resistance of a carbon resistor determined from colour codes is \( (22000 \pm 5\%) \, \Omega \). The colour of third band must be :
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The magnitude and direction of the current in the following circuit is
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The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are :
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The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is :
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For Young's double slit experiment, two statements are given below: Statement I : If screen is moved away from the plane of slits, angular separation of the fringes remains constant. Statement II : If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases. In the light of the above statements, choose the correct answer from the options given below:
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The net impedance of circuit (as shown in figure) will be :
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The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are \( 2.14\text{ eV} \), \( 2.30\text{ eV} \) and \( 2.75\text{ eV} \) respectively. If incident electromagnetic radiation has an incident energy of \( 2.20\text{ eV} \), which of these photosensitive surfaces may emit photoelectrons?
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An electric dipole is placed at an angle of \( 30^\circ \) with an electric field of intensity \( 2 \times 10^5\text{ N C}^{-1} \). It experiences a torque equal to \( 4\text{ N m} \). Calculate the magnitude of charge on the dipole, if the dipole length is \( 2\text{ cm} \).
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A very long conducting wire is bent in a semi-circular shape from A to B as shown in figure. The magnetic field at point P for steady current configuration is given by :
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