ECAT Physics Chapter 12 Electrostatics Online Test With Answers

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ECAT Physics Chapter 12 Electrostatics Online Test

Sr. # Questions Answers Choice
1 Heating effect caused by an electric circuit is written H = I<sup>2</sup>Rt H = I<sup>2</sup>R H = IR<sup>2</sup>t H = IR<sup>2</sup>
2 Electric generators which convert mechanical energy into solar energy thermal energy kinetic energy electrical energy
3 Solar cell converts sunlight directly into potential energy thermal energy mechanical energy electrical energy
4 If a 40 watt light bulb burns for 2 hours. how much heat is generated 288 x 10<sup>3</sup>J 288 x 10<sup>8</sup>J 288 x 10<sup>5</sup>J 288 x 10<sup>6</sup>J
5 The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of power current resistance temperature
6 The speed of randomly moving electrons depends upon pressure volume temperature mass
7 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of negative charges positive charges protons electrons
8 The charge carriers in gases are electrons ions protons ions and electrons
9 The charge carriers in electrolyte are positive and negative protons electrons ions none of these
10 The relation between charge 'Q' and current 'I' is given by Q = I/t Q = It Q = I<sup>2</sup>t Q = I<sup>2</sup>/t
11 Which of the following represents an electric current? C<sup>-1</sup> CS<sup>-1</sup> J.S<sup>-1</sup> dynes<sup>-1</sup>
12 The SI unit of current is watt coulomb volt ampere
13 One coulomb per second is equal to One volt One ampere One hom One henry
14 The charge per unit time through any cross-section of a conductor is called capacitance electric power current potential difference
15 Free electrons are tightly bound fixed loosely bound tightly fixed
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