[amp_mcq option1=”200″ option2=”100″ option3=”3 to 8″ option4=”1 to 2″ correct=”option3″]
Electrostatics
32. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is
[amp_mcq option1=”0.56 x 1015 m/s2″ option2=”1.5 x 1015 m/s2″ option3=”1.6 x 1015 m/s2″ option4=”1.76 x 1015 m/s2″ correct=”option3″]
33. Which of the following capacitors can be used for temperature compensation ?
[amp_mcq option1=”Air capacitor” option2=”Ceramic capacitor” option3=”Paper capacitor” option4=”None of the above” correct=”option2″]
Detailed SolutionWhich of the following capacitors can be used for temperature compensation ?
34. capacitors are used in transistor circuits.
[amp_mcq option1=”Ceramic” option2=”Paper” option3=”Air” option4=”Electrolytic” correct=”option1″]
Detailed Solutioncapacitors are used in transistor circuits.
35. A capacitance of 100 uF is connected in series with a resistance of 8000 ohm. The time constant of the circuit is
[amp_mcq option1=”0.2 s” option2=”0.4 s” option3=”0.6 s” option4=”0.8 s” correct=”option3″]
36. A capacitance is a circuit component that opposes the change in circuit
[amp_mcq option1=”current” option2=”voltage” option3=”impedance” option4=”none of the above” correct=”option1″]
Detailed SolutionA capacitance is a circuit component that opposes the change in circuit
37. Dielectric strength of mica is
[amp_mcq option1=”10 to 20 kV/mm” option2=”30 to 50 kV/mm” option3=”50 to 200 kV/mm” option4=”300 to 500 kV/mm” correct=”option3″]
38. A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be
[amp_mcq option1=”5 times smaller than before” option2=”5 times greater than before” option3=”10 times greater than before” option4=”25 times larger than before” correct=”option3″]
39. An electrolytic capacitor can be used for
[amp_mcq option1=”D.C. only” option2=”A” option3=”only B. AC. only C. both” option4=”none of the above” correct=”option3″]
40. Capacitance increases with
[amp_mcq option1=”increase in plate area and decrease in distance between the plates” option2=”increase in plate area and distance between the plates” option3=”decrease in plate area and value of applied voltage” option4=”reduction in plate area and distance between the plates” correct=”option1″]