[amp_mcq option1=”Coulomb/meter” option2=”Coulomb/meter2″ option3=”Coulomb/meter3″ option4=”Coulomb/meter4″ correct=”option3″]
Electrostatics
2. capacitors are used for audio frequency and radio frequency coupling and tuning.
[amp_mcq option1=”Air” option2=”Mica” option3=”Plastic film” option4=”Ceramic” correct=”option4″]
Detailed Solutioncapacitors are used for audio frequency and radio frequency coupling and tuning.
3. A capacitor consists of two
[amp_mcq option1=”Ceramic plates and one mica disc” option2=”Insulators separated by a dielectric” option3=”Silver-coated insulators” option4=”Conductors separated by an insulator” correct=”option4″]
4. at a point is equal to the negative potential gradient at that point.
[amp_mcq option1=”Electric intensity” option2=”Electric flux” option3=”Magnetic flux” option4=”Magnetic flux density” correct=”option1″]
Detailed Solutionat a point is equal to the negative potential gradient at that point.
5. A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 103 N, is known as
[amp_mcq option1=”milli-coulomb” option2=”micro-coulomb” option3=”pico-coulomb” option4=”coulomb” correct=”option4″]
6. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
[amp_mcq option1=”50 joules” option2=”150 joules” option3=”200 joules” option4=”250 joules” correct=”option3″]
7. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is
[amp_mcq option1=”100 kV/m” option2=”10 kV/m” option3=”5 kV/m” option4=”2 kV/m” correct=”option1″]
8. The minimum value of potential gradient in a cable occurs in
[amp_mcq option1=”insulation” option2=”conductor” option3=”outer sheath” option4=”uniformly all over” correct=”option1″]
Detailed SolutionThe minimum value of potential gradient in a cable occurs in
9. The breakdown voltage for paper capacitors is usually
[amp_mcq option1=”20 to 60 volts” option2=”200 to 1600 volts” option3=”2000 to 3000 volts” option4=”more than 10000 volts” correct=”option2″]
Detailed SolutionThe breakdown voltage for paper capacitors is usually
10. A paper capacitor is usually available in the form of
[amp_mcq option1=”tubes” option2=”rolled foil” option3=”disc” option4=”meshed plates” correct=”option1″]
Detailed SolutionA paper capacitor is usually available in the form of