Class 10th Ncert Physics Syllabus Model,One Sheet Boat Example,Innovative Yacht Builders St George Vi - Step 2
29.12.2020, adminIf any student of CBSE Board continuously practices last year question paper student will easily score high marks in tests. Fortunately earlier year question papers can assist the understudies with scoring great in the tests. Unraveling previous year question paper class 12 Physics is significant for understudies who will show up for Class 12 Board tests.
A circular loop of radius r, carrying a current I lies in y-z plane with its centre at the origin. The net magnetic flux through the loop is :. The ratio of the de-Broglie wavelengths associated with them, will be. As a result, current I flows in the circuit. A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table.
The magnetic field developed at a distance of 10 cm due north on the table is :. Unpolarised light of intensity I o is incident on two crossed polaroids. The work done in moving a charge particle between two points in Ncert Solutions Class 10th Physics Chapter Light Jacket an uniform electric field, does not depend on the path followed by the particle. Magnetic declination is the angle between the magnetic meridian and the geographic meridian at a place on the earth.
How will the displacement current be affected with the decrease in frequency of the source? An astronomical telescope may be a refracting type or a reflecting type. Which of the two produces image of better quality? Justify your answer. Any one. Can a slab of p-type semi-conductor be physically joined to another n-type semiconductor slab to form p-n junction? In a p-n junction diode the forward bias resistance is low as compared Class 10th Ncert Physics Book You to the reverse bias resistance.
Give reason. The forward current is large due to majority charge carriers which are very large in number. Hence resistance in forward bias is low. Alternatively: Depletion region decreases or barrier potential decreases. A wire of length L o has a resistance R o. It is gradually stretched till its length becomes 2 L o. When L, C and R are connected in series with the same source,. Light of same wavelength is incident on three photo-sensitive surfaces A, B and C.
The following observations are recorded. If the frequency of light incident on the cathode of a photo-cell is increased, how will the following be affected? Briefly explain how a potential barrier is set up across a p-n junction as a result of diffusion and drift of the charge carriers. Diffusion current is set up across the junction due to the concentration difference of the majority charge carriers on the two sides of the junction.
This diffusion develops an electric field from n- side to p- side across the junction which creates a drift current in the opposite direction. When diffusion and drift current become equal in magnitude the potential difference across the junction is the barrier potential. A hollow conducting sphere of inner radius r 1 and outer radius r 2 has a charge Q on its surface. A point charge �q is also placed at the centre of the sphere. Two primary cells of emf E 1 and E 2 are joined together in a series with i same polarity and ii opposite polarity.
The combination is connected to the potentiometer circuit in each case. The balancing length of the wire in the two cases are found to be cm and cm, respectively.
Find the values of emf of the two cells. The current in one coil is changed uniformly from zero to 0. Find the :. Explain with the help of a diagram, the working of a step-down transformer. Why is a laminated iron core used in a transformer? Two objects P and Q when placed at different positions in front of a concave mirror of focal length 20 cm, form real images of equal size. Size of object P is three times size of object Q.
If the distance of P is 50 cm from the mirror, find the distance of Q from the mirror. Obtain the expression for the magnetic field at an external point lying on its axis. The coil lies in Class 10th Physics Chapter 2 Ncert Solutions Pdf X-Y plane with its centre at the origin. Find the magnitude and direction of the magnetic dipole moment of the coil.
Hence, define 1 A current. A force F is applied at right angles to the axis of the magnet, 10 cm from the pivot. It is observed that an external magnetic field of 0. Facebook Twitter whatsapp Linkdin Copyright ncerthelp. Follow Us On Facebook. Please Share this webpage on facebook, whatsapp, linkdin and twitter.
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