200
100
3 to 8
1 to 2
Answer is Right!
Answer is Wrong!
Electrostatics
82. 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
0.56 x 1015 m/s2
1.5 x 1015 m/s2
1.6 x 1015 m/s2
1.76 x 1015 m/s2
Answer is Right!
Answer is Wrong!
83. Which of the following capacitors can be used for temperature compensation ?
Air capacitor
Ceramic capacitor
Paper capacitor
None of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionWhich of the following capacitors can be used for temperature compensation ?
84. capacitors are used in transistor circuits.
Ceramic
Paper
Air
Electrolytic
Answer is Right!
Answer is Wrong!
Detailed Solutioncapacitors are used in transistor circuits.
85. A capacitance of 100 uF is connected in series with a resistance of 8000 ohm. The time constant of the circuit is
0.2 s
0.4 s
0.6 s
0.8 s
Answer is Right!
Answer is Wrong!
86. A capacitance is a circuit component that opposes the change in circuit
current
voltage
impedance
none of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionA capacitance is a circuit component that opposes the change in circuit
87. Dielectric strength of mica is
10 to 20 kV/mm
30 to 50 kV/mm
50 to 200 kV/mm
300 to 500 kV/mm
Answer is Right!
Answer is Wrong!
88. 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
5 times smaller than before
5 times greater than before
10 times greater than before
25 times larger than before
Answer is Right!
Answer is Wrong!
89. An electrolytic capacitor can be used for
D.C. only
A
only B. AC. only C. both
none of the above
Answer is Right!
Answer is Wrong!
90. Capacitance increases with
increase in plate area and decrease in distance between the plates
increase in plate area and distance between the plates
decrease in plate area and value of applied voltage
reduction in plate area and distance between the plates
Answer is Right!
Answer is Wrong!