Second Year Physics Chapter 15 Online MCQ Test for 2nd Year Physics Chapter 15 Electromagnetic Induction Preparation

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.#	Question	Answer
1	When a conductor moves across a magnetic field an emf is set up this emf is called.	A. Variable emf B. Constant emf C. Back emf D. Induced emf
2	Mutual induction has a practical role in the performance of the.	A. Radio choke B. Transformers C. A.C. Generator D. D.C. Generator
3	A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.	A. 0.1 J B. 10 J C. 100 J D. 1000 J
4
5	The magnitude of back emf:	A. Increases with sped of motor B. Decreases with speed of motor C. Remains same  D. None of above
6	The winding of the electromagnet in motor are usually called.	A. Magnetic coils B. Field coils C. Electric coils D. electric o electric coils
7	Energy density of an inductor is:	A. UM=1/2μ∘/B2 B. Um = 2μ∘/B C. UM = 1/2B2/μ∘ D. Um = 2B2/μ∘
8	The device in the circuit that consume electrical energy are known as.	A. Dissipaters B. Generator C. Load D. Motors
9	Step up transfer has a transformation ratio of 3:2. What is the voltage in secondary , If voltage in primary is 30 V?	A. 45 V B. 15 V C. 90 V D. 300 V
10	The self induction emf is some times called.	A. Motional emf B. Constant emf C. Back emf D. Variable emf