[{"id":170484,"question":"The colour of live wire is:
","choices":[{"text":"Black or blue
","value":"A"},{"text":"Green or yellow
","value":"B"},{"text":"White or grey
","value":"C"},{"text":"Red or brown
","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":170483,"question":"The current which does not change its direction is called:
","choices":[{"text":"A.C
","value":"A"},{"text":"D.C
","value":"B"},{"text":"Conventional
","value":"C"},{"text":"Transient current
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":170481,"question":"The A.C used in Pakistan has frequency:
","choices":[{"text":"60 Hz
","value":"A"},{"text":"30 Hz
","value":"B"},{"text":"50 Hz
","value":"C"},{"text":"130 Hz
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170480,"question":"The unit of electric power is:
","choices":[{"text":"Volt
","value":"A"},{"text":"Watt
","value":"B"},{"text":"Joule
","value":"C"},{"text":"Coulomb
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170478,"question":"Joule’s law is W=
","choices":[{"text":"IR/t
","value":"A"},{"text":"IRt2
","value":"B"},{"text":"IR2t
","value":"C"},{"text":"I2Rt
","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":170477,"question":"How Galvanometer is connected in circuit to detect current:
","choices":[{"text":"In series
","value":"A"},{"text":"In parallel
","value":"B"},{"text":"Fixed
","value":"C"},{"text":"Variable
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":170476,"question":"Which instrument is used to detect current:
","choices":[{"text":"Galvanometer
","value":"A"},{"text":"Voltmeter
","value":"B"},{"text":"Ammeter
","value":"C"},{"text":"Electroscope
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":170472,"question":"What type of graph is in between V and I, if metal obeys\r\nohm’s law:
","choices":[{"text":"Curved
","value":"A"},{"text":"Parabola
","value":"B"},{"text":"Straight line
","value":"C"},{"text":"None of these
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170471,"question":"According to ohm’s law V= :
","choices":[{"text":"I2R
","value":"A"},{"text":"IR2
","value":"B"},{"text":"IR
","value":"C"},{"text":"I/R
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170469,"question":"The combined resistance of two identical resistors,\r\nconnected in series is 8Ω. Their combined resistance in a parallel arrangement\r\nwill be:
","choices":[{"text":"2 Ω
","value":"A"},{"text":"4 Ω
","value":"B"},{"text":"8 Ω
","value":"C"},{"text":"12 Ω
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":170468,"question":"What is the power rating of a lamp connector to a 12 V\r\nsource when it carries 2.5 A:
","choices":[{"text":"4.8W
","value":"A"},{"text":"14.5W
","value":"B"},{"text":"30W
","value":"C"},{"text":"60W
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170466,"question":"If we double both the current and the voltage in a circuit\r\nwhile keeping its resistance constant, the power:
","choices":[{"text":"Remains unchanged
","value":"A"},{"text":"Halves
","value":"B"},{"text":"Doubles
","value":"C"},{"text":"Four time
","value":"D"},{"value":"E"}],"correctAnswer":4}]