[{"id":170253,"question":"An object is placed at the Centre of curvature of a concave\r\nmirror. The image produced by the mirror is located:
","choices":[{"text":"Out beyond the centre of curvature
","value":"A"},{"text":"At the centre of curvature
","value":"B"},{"text":"Between the centre of curvature and the focal point
","value":"C"},{"text":"At the focal point
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170252,"question":"A converging mirror with a radius of 20cm creates a real\r\nimage 30 cm from the mirror. What is the object distance:
","choices":[{"text":"5.0 cm
","value":"A"},{"text":"7.5 cm
","value":"B"},{"text":"15 cm
","value":"C"},{"text":"20 cm
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170251,"question":"Which of the following quantities is not change during\r\nrefraction of light:
","choices":[{"text":"Its direction
","value":"A"},{"text":"Its speed
","value":"B"},{"text":"Its frequency
","value":"C"},{"text":"Its wavelength
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170249,"question":"Example of mechanical waves is:
","choices":[{"text":"Radio waves
","value":"A"},{"text":"X-rays
","value":"B"},{"text":"Light waves
","value":"C"},{"text":"Sound waves
","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":170248,"question":"The characteristics of sound by which we can distinguish\r\nbetween two sounds of same loudness and pitch is called.
","choices":[{"text":"Intensity
","value":"A"},{"text":"Quality
","value":"B"},{"text":"Loudness
","value":"C"},{"text":"Pitch
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170247,"question":"We can distinguish between the notes of a piano and flute\r\ndue to ………… of sound.
","choices":[{"text":"Loudness
","value":"A"},{"text":"Pitch
","value":"B"},{"text":"Quality
","value":"C"},{"text":"Intensity
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170245,"question":"The speed of sound in a liquid is …………..than that in gases:
","choices":[{"text":"Ten times
","value":"A"},{"text":"Fifteen times
","value":"B"},{"text":"Five times
","value":"C"},{"text":"Two times
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170244,"question":"The sensation of sound persists in our brain for:
","choices":[{"text":"0.1 sec
","value":"A"},{"text":"0.01 sec
","value":"B"},{"text":"1 sec
","value":"C"},{"text":"10 sec
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166337,"question":"The equivalent resistance of a parallel combination is","choices":[{"text":"equal to sum of all resistance","value":"A"},{"text":"is greater than the largest resistance of combination","value":"B"},{"text":"is smaller than the smallest resistance of combination","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166336,"question":"When resistance are connected in series the current passing through them is .","choices":[{"text":"Different","value":"A"},{"text":"Zero","value":"B"},{"text":"The same","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166335,"question":"The property of substance, which opposes the flow of current through it is called.","choices":[{"text":"Resistance","value":"A"},{"text":"Reactance","value":"B"},{"text":"Resistivity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166334,"question":"As the temperature of a conductor rises, its resistance.","choices":[{"text":"Increase","value":"A"},{"text":"Decrease","value":"B"},{"text":"Does not change","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1}]