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Mdcat-past-papers - UHS - Physics Quiz

Filters: Board: UHS | Subject: Physics |
161. 10V potential difference is applied across the plate of 1 μF capacitor what is the energy stored in capacitor



162. What is the charge stored on a 5μF capacitor applied to potential difference of 12V?



163. If the length, width and separation between the plates of a parallel plate capacitor is doubled then its capacitance becomes:



164. A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor of same capacity is connected in parallel to the first capacitor. Then energy stored in each capacitor is:



165. A capacitor of capacitance 'C' has a charge 'Q' and stored energy is 'w'. If the charge increases to '2Q'. The stored energy will be:



166. What do the substances whose resistance decreases with increase in temperature have?



167. To store the electric charge the ultra-capacitor use ....... effect.



168. A capacitor of capacitance 'C' has a charge 'Q' and stored energy is 'w'. If the charge is increased to '2Q'. The stored energy will be:



169. The SI unit of capacitance of a capacitor is:



170. Electric current is flowing through the circuit as shown in figure. What will be the direction of magnetic lines of force?



171. The value of magnetic flux is 10 Wb. When magnetic lines of force containing magnetic field strength of 1 T pass through a unit area of 10 m², then angle between magnetic field and unit area is:



172. If a conductor of length 7 m is placed in a magnetic field of strength 0.3 T carrying current 1 A, parallel to the field, what will be the force acting on it due to this magnetic field?



173. The horizontal component of Earth's magnetic flux density is 1.8 × 10⁻⁶ T. The current in a horizontal cable is 160 A. Calculate the maximum force per unit length.



174. If we change the magnetic flux linking a coil in a constant magnetic field, the rate of change of flux is:



175. Which surface has greater magnetic flux in same magnetic field, each has an area 1 m²?



176. The source of magnetic field is:



177. If 0.5 T field is applied over an area of 2 m² which lies at an angle of 60° with the field, then the resulting flux will be:



178. The magnitude of magnetic force will be maximum on a current-carrying conductor in uniform magnetic field if conductor is placed:



179. The formula Φ = B•A represents:



180. Which of the following statement is incorrect for any magnetic field lines?



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