0% Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 12345678910 Physics Class- 12 This Quiz Contains a Set of 10 Questions. Passing cut-off is 60%. To Start the Quiz... Click on the Start Button. All the Best. 1 / 10 A pair of adjacent coils has a mutual inductance of 1.5H. If the current in one coil changes from 0 A to 20 A in 0.5 sec. what is the flux linkage in Weber with the other coil? 40 50 30 20 2 / 10 A current loop placed in a non-uniform magnetic field experiences: a net force but not torque a torque but no net force neither a net force nor a torque a net force and a torque both 3 / 10 The resistance and resistivity of a given wire are R and ρ respectively. If its length and radius both are doubled, then the new resistance and resistivity will be: 2R and 2ρ respectively R/2 and ρ/2 respectively 2R and ρ respectively R/2 and ρ respectively 4 / 10 A positively charged particle is released from the rest in a uniform electric field. The electric potential energy of the charge will: remains same increase decrease become zero 5 / 10 Which of the following statements is true? Energy is created when a transformer steps up the voltage A transformer is designed to convert an AC voltage to DC voltage Step–up transformer increases the power for transmission Step–down transformer decreases the AC voltage 6 / 10 A 10 m long wire of uniform cross-section and 20 ohms resistance is used in a potentiometer. The wire is connected in series with a battery of 5 V along with an external resistance of 480 ohms. If an unknown emf E is balanced at 6.0 m length of the wire, then the value of unknown emf is- 1.2 V 1.02 V 0.2 V 0.12 V 7 / 10 The graph given below shows constant acceleration: i ii iii iv 8 / 10 The current sensitivity of a moving coil galvanometer increases with the decrease in: number of turns magnetic field area of the coil none of these 9 / 10 In a coil of resistance 100 ohms, a current is induced by changing the magnetic flux through it. The variation of current with time is as shown in the figure given below. The magnitude of change in flux through the coil is: 200 Wb 275 Wb 225 Wb 250 Wb 10 / 10 An electron is moving along the positive x-axis in a magnetic field which is parallel to the positive y-axis. In what direction will the magnetic force be acting on the electron? Along -x axis Along -z axis Along +z axis Along -y axis Your score is 0% Restart quiz
