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Mdcat-past-papers - NUMS - Physics Quiz

Filters: Board: NUMS | Subject: Physics |
141. Magnetic flux is maximum when angle between magnetic field and vector area is:



142. The domestic electric supply in Pakistan is:



143. An aircraft of wingspan 50m flies horizontally at an area where the vertical component of earth's magnetic field is 2×10⁻⁵T. In order to produce an emf of 1 volt between the aircraft's wingtips its speed should be:



144. In Fleming's right hand rule, the second finger indicates:



145. The device which increases or decreases the emf is called:



146. The induced current will flow in such a direction that it opposes the cause producing it. The statement belongs to:



147. Transformer works on the principle of:



148. In Fleming's right rule, the thumb indicates:



149. The Lenz's law is also statement of law of conservation of:



150. An AC current generator is a device that converts:



151. A transformer used on a 220V line delivers 22A at 1800V. What current is drawn from the line (assume 100% efficiency)?



152. For rectification transformer used is:



153. The device which converts AC into DC current:



154. A device that converts AC into DC is called:



155. The conversion of alternating current into direct current is called:



156. In full wave rectification, ------- diodes are used:



157. 32g of radioactive element decays and remains 2g after 60 days. Its half-life is:



158. 32g of a radioactive element decays and remains 2g after 60 days. What is the half-life of the radioactive element?



159. 189F=188O +X+Y+Q



160. What are the particles emitted in a nuclear reaction in which nuclei are bombarded by protons, the ⁴Be nuclei are produced:



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