Online MCQs Quiz on Electronics

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SSC-II (Class 10) Physics; Unit-13; Electronics

i. A positive electric charge

10 points

(a) attract other positive charge

(b) repels other positive charge

(d) repels a neutral charge

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ii. An object gains excess negative charge after being rubbed against another object, which becomes

10 points

(a) neutral

(b) negatively charged

(d) either a, b or c

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Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of the following statements is true about object A?

10 points

(a) remains uncharged

(b) becomes positively charged

(d) unpredictable

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iv. When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards It. What does this observation indicate?

10 points

(a) the rod and the paper are oppositely charged

(b) the rod acquires a positive charge

(d) the rod acquires a negative charge

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v. According to Coulomb's law, what happens to the attraction of two oppositely charged objects as their distance of separation increases?

10 points

(a) increase

(b) decrease

(d) cannot be determined

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vi. The Coulomb's law is valid for the charges which are:

10 points

(a) moving and point charges

(b) moving and non-point charges

(d) stationary and large size charges

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vii. A positive and a negative charge are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is

10 points

(a) 4 times smaller than before

(b) 4 times larger than before

(d) 16 time larger than before

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viii. Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is:

10 points

(a) 0.5 V

(b) 2 V

(d) 10 V

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ix. Two small charged spheres are separated by 2mm. Which of the following would produce the greatest attractive force?

10 points

(a) +1 q and +4 q

(b) -1 q and -4 q

(d) +2q and -2q

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x. Eclectic field lines

10 points

(a) always cross each other

(b) never cross each other

(d) cross each other in the region of weak field

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xi. Capacitance is defined is

10 points

(a) VC

(b) Q/V

(d) V/Q

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