MDCAT Physics mcq test with answers for chapter 10 (Electronics)

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MCAT Physics Chapter 10 Important MCQ's

Sr.#	Question	Answer
1	Electric current is defined as:	A. Flow of charges through conductor B. Rate of flow of charges through conductor C. Flow of electrons D. Flow of protons
2	When resistances are connected in Parallel, the effective resistance will be	A. Product of the reciprocals of the individual resistances B. Product of the individual resistances C. Sum of the reciprocals of the individual resistances D. Sum of the individual resistances
3	A steady current is flowing in a conductor of non-uniform cross-section. Thecharge passing through any cross-section per unit time is	A. Directly proportional to the area of cross-section B. Inversely proportional to the area of cross-section C. Proportional to square of the area of cross-section D. Independent of the area of cross-section
4	An electric room radiator, which operates at 50V has resistance of 50 Ω. Power of the radiator is approximately:	A. 100W B. 50W C. 450W D. 1000W
5	A charge is 90C passes through a wire in 1 hour and 15 minutes. Wat is the current in the wire?	A. 10mA B. 20mA C. 15mA D. 25mA
6	Resistance of 60 watt bulbs in 120V line is:	A. 20 ohms B. 240 ohms C. 0.15 ohms D. 180 ohms
7	A piece of Aluminium (Al) and a piece of Germanium (Ge) are cooled T1 K to T2 K. The resistance of:	A. Each of them increases B. Each of them decreases C. Al increases and Ge decreases D. Al decreases and that of Ge increases
8	The ‘emf ’ is always even when no current is drawn through the battery of the cell:	A. Zero B. Present C. Absent D. Maximum
9	A total charge of 100C flows through 12W bulb in a time of 50 second. Which is the potential difference across the bulb during this time?	A. 0.12V B. 6.0V C. 2.0V D. 24V
10	If a source of emf is traversed from positive to negative the potential change will be:	A. Positive B. Negative C. Zero D. Constant

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