[{"id":227223,"question":"Drift velocity of electrons is.","choices":[{"text":"10<sup>-1</sup> m/s","value":"A"},{"text":"10<sup>-2</sup> m/s","value":"B"},{"text":"10<sup>-3</sup> m/s","value":"C"},{"text":"10<sup>3</sup> m/s","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":227222,"question":"If 1 x 10<sup>7</sup> electrons passes through a conductor in 1.0 micro second , then the current is.","choices":[{"text":"2 A","value":"A"},{"text":"1.6 A","value":"B"},{"text":"2.6 x 10<sup>-6</sup> A","value":"C"},{"text":"1.6 x 10<sup>-6</sup> A","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":227221,"question":"A battery move a charge of 40 C around a circuit at constant rate in 20 Sec. The current will be.","choices":[{"text":"2 A","value":"A"},{"text":"0.5 A","value":"B"},{"text":"80 A","value":"C"},{"text":"800 A","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":227220,"question":"The potential difference between the head and tail of an electrical to","choices":[{"text":"600 Volt","value":"A"},{"text":"700 Volt","value":"B"},{"text":"800 Volt","value":"C"},{"text":"900 Volt","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":227219,"question":"Ampere second stands for the unit of.","choices":[{"text":"Charge","value":"A"},{"text":"emf","value":"B"},{"text":"energy","value":"C"},{"text":"Power","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":227218,"question":"A charged conductor has charge on its.","choices":[{"text":"Inner surface","value":"A"},{"text":"Outer surface","value":"B"},{"text":"Middle surface","value":"C"},{"text":"Surrounding space","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177718,"question":"Thermosouple is an arrangement of two different metals:","choices":[{"text":"Two convert heat energy into electrical energy","value":"A"},{"text":"To produce more heat","value":"B"},{"text":"To convert heat energy into chemical energy","value":"C"},{"text":"To convert electrical energy into heat energy","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":177717,"question":"The powers of two electric bulbs are 100w and 200w. Which are connected to power supply of 220 V. The ratio of resistance of their filament will be:","choices":[{"text":"1<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">:2</span>","value":"A"},{"text":"2<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">:1</span>","value":"B"},{"text":"1<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">:3</span>","value":"C"},{"text":"4<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">:3</span>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177716,"question":"The resistivity of two wires is<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ<sub>1</sub> and</span><span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ<sub>2</sub> which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:</span>","choices":[{"text":"(<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ<sub>1</sub> +</span><span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ<sub>2</sub></span>)","value":"A"},{"text":"1/<span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub>1</sub>+ 1/</span><span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub>2</sub></span>","value":"B"},{"text":"<span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub style=\"\">1</sub>+</span><span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub style=\"\">2</sub></span>/2","value":"C"},{"text":"<span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub>1/</sub></span><span style=\"font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);\">ρ<sub>2</sub></span>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":177715,"question":"A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:","choices":[{"text":"Doubled","value":"A"},{"text":"Halved","value":"B"},{"text":"Remain the same","value":"C"},{"text":"One fourth","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":177714,"question":"When a wire is stretched and its radius becomes r/2, then its resistance will be","choices":[{"text":"16 R","value":"A"},{"text":"4 R","value":"B"},{"text":"2R","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":177713,"question":"106 electrons are moving through a wire per second the current developed is:","choices":[{"text":"1.6 x 10-19 A","value":"A"},{"text":"1 A","value":"B"},{"text":"1.6 x 10-13A","value":"C"},{"text":"106 A","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":177710,"question":"Calculate current in 2 2R /4Ω resistor.","choices":[{"text":"1 A","value":"A"},{"text":"2R /4Ω","value":"B"},{"text":"R/3Ω","value":"C"},{"text":"2R /3Ω","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177709,"question":"Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?","choices":[{"text":"3 RΩ","value":"A"},{"text":"2R /4Ω","value":"B"},{"text":"R/3Ω","value":"C"},{"text":"2R /3Ω","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177708,"question":"Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:","choices":[{"text":"3Ω","value":"A"},{"text":"4Ω","value":"B"},{"text":"4.5Ω","value":"C"},{"text":"5Ω","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60168,"question":"The unit of resistance is:","choices":[{"text":"Ω","value":"A"},{"text":"Ωm","value":"B"},{"text":"Ω<sup>-1</sup>m<sup>-1</sup>","value":"C"},{"text":"Ωm<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60167,"question":"Semiconductor diodes are called:","choices":[{"text":"Ohmic","value":"A"},{"text":"non ohmic","value":"B"},{"text":"Both a &amp; b","value":"C"},{"text":"none of above","value":"D"},{"value":"E"}],"correctAnswer":2}]